Toro 41188 Service Manual Download Page 346

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Page 10 − 6

Electrical Schematic

All relays and solenoids
are shown as de−energized.
All ground wires are black.

(machine serial number above 315000000)
page 2 of 2

Multi Pro 1750

NOTE: WHEN A CONDUCTOR CONTINUES ONTO THE VEHICLE SCHEMATIC
(SHOWN ON PREVIOUS PAGE), A REFERENCE NUMBER WILL BE IDENTIFIED.

SPRAY PRESSURE

(APPLICATION RATE)

SWITCH

121−0430 A

Summary of Contents for 41188

Page 1: ...Form No 15215SL Rev A Multi Pro 1750 Original Instructions EN...

Page 2: ...ent and all information contained herein is the sole property of The Toro Company and or its affiliated companies No intellectual property rights are granted by the delivery of this document or the di...

Page 3: ...lications To do this effectively we encourage user feedback Please comment on the completeness accuracy organization usability and readability of this manual by an e mail to servicemanuals toro com or...

Page 4: ...NOTES _...

Page 5: ...onal copies of the Operator s Manual and Parts Catalog are available on the internet at www Toro com The Toro Company reserves the right to change product specifications or this publication without no...

Page 6: ...Multi Pro 1750 This page is intentionally blank...

Page 7: ...System Quick Checks 5 28 Component Testing 5 30 Service and Repairs 5 65 Chapter 6 Spray System Specifications 6 2 General Information 6 2 Spray System Operation 6 3 Spray System Flow Diagrams 6 4 Tro...

Page 8: ...Multi Pro 1750 This page is intentionally blank...

Page 9: ...Pro 1750 Page 1 1 Safety Chapter 1 Safety Table of Contents SAFETY INSTRUCTIONS 2 Before Operating 2 While Operating 2 Maintenance and Service 3 JACKING INSTRUCTIONS 4 SAFETY AND INSTRUCTION DECALS 4...

Page 10: ...ensure machine is in safe operating condition 3 Assure interlock switches are adjusted correctly so engine cannot be started unless range selector is in NEUTRAL 4 Since gasoline is highly flammable h...

Page 11: ...excessive grease grass leaves and dirt Clean protective screen on machine frequently 10 If engine must be running to perform maintenance or an adjustment keep hands feet clothing and other parts of t...

Page 12: ...sts and jack stands for raising and sup porting the machine Jacking the Front End 1 Set parking brake and chock both rear tires to pre vent the machine from moving 2 Position jack securely under the f...

Page 13: ...rds Insert Operator s Manual and Parts Catalog for your Multi Pro 1750 at the end of this chapter Refer to Opera tor s Manual for recommended maintenance intervals Additionally insert Installation Ins...

Page 14: ...0 09375 Multi Pro 1750 Page 2 2 Product Records and Maintenance Equivalents and Conversions...

Page 15: ...and mating part then back off fastener 1 4 of a turn Measure the torque required to tighten the fastener until the lines match up Fastener Identification Figure 1 Grade 1 Grade 5 Grade 8 Inch Series B...

Page 16: ...58 5 3 8 24 UNF 17 2 18 2 24 3 35 3 47 4 50 4 68 5 7 16 14 UNC 27 3 27 3 37 4 50 5 68 7 70 7 95 9 7 16 20 UNF 29 3 29 3 39 4 55 5 75 7 77 7 104 9 1 2 13 UNC 30 3 48 7 65 9 75 8 102 11 105 10 142 14 1...

Page 17: ...N m M16 X 2 0 166 15 ft lb 225 20 N m 229 22 ft lb 310 30 N m M20 X 2 5 325 33 ft lb 440 45 N m 450 37 ft lb 610 50 N m NOTE Reduce torque values listed in the table above by 25 for lubricated fasten...

Page 18: ...n lb Wheel Bolts and Lug Nuts Thread Size Recommended Torque 7 16 20 UNF Grade 5 65 10 ft lb 88 14 N m 1 2 20 UNF Grade 5 80 10 ft lb 108 14 N m M12 X 1 25 Class 8 8 80 10 ft lb 108 14 N m M12 X 1 5 C...

Page 19: ...erator s Manual 3 SPECIAL TOOLS 4 TROUBLESHOOTING 5 Clutch 5 ADJUSTMENTS 7 Adjust Engine Speed 7 Adjust Choke Cable 8 Adjust Clutch Cable 9 SERVICE AND REPAIRS 10 Cooling System 10 Fuel System 12 Carb...

Page 20: ...n Ratio 9 0 1 Fuel Unleaded Regular Gasoline Minimum 87 Octane Fuel Tank Capacity 5 U S gal 18 9 liters Governor Mechanical Low Idle Speed no load 1350 to 1450 RPM High Idle Speed no load 3350 to 3450...

Page 21: ...many service shops Special tools are described in the Kohler Engine Service Manu al The use of some specialized test equipment is ex plained However the cost of the test equipment and the specialized...

Page 22: ...ngine Special Tools Order special tools from your Toro Distributor Clutch Alignment Tool Use clutch alignment tool to align clutch friction disk to engine flywheel before tightening pressure plate cap...

Page 23: ...nstallation of clutch cover assembly Damaged clutch disc Excessive wear of clutch disc facing Weak or broken clutch torsion spring Damaged or broken clutch pressure plate Bent or broken clutch diaphra...

Page 24: ...spring tip Damaged or distorted clutch disc Worn or rusted clutch disc spline Damaged pressure plate or flywheel Damaged release bearing Clutch chatters Worn or damaged clutch disc facing Oil adhered...

Page 25: ...rrect adjust high speed screw on control bracket Fig 2 A Loosen jam nut on high speed screw B Adjust high speed screw to obtain 3350 to 3450 RPM C Tighten lock nut Recheck high speed 6 Allow accelerat...

Page 26: ...ir filter from engine 4 Move choke control on control panel while watching choke plate in carburetor A Choke plate should be fully open when choke control is pushed in B Choke plate should be fully cl...

Page 27: ...Fig 4 4 Apply 4 lbs kg force against clutch pedal and adjust cable nuts Fig 4 until bottom edge of clutch pedal is 2 4 to 2 6 in 60 to 66 mm from floor plate Fig 5 5 Connect clutch return spring 6 Ma...

Page 28: ...blower housing will result in en gine overheating and engine damage 1 Park machine on a level surface stop spray pump stop engine and engage parking brake Remove key from ignition switch IMPORTANT Nev...

Page 29: ...Multi Pro 1750 Page 3 11 Kohler Gasoline Engine This page is intentionally blank Kohler Gasoline Engine...

Page 30: ...er to check valve 12 Vacuum check valve 13 Vapor hose check valve to engine 14 Carbon canister 15 Fresh air hose 16 Fresh air filter 17 Carbon canister mount 18 Fuel tank strap 2 19 Flat washer 2 20 C...

Page 31: ...n fuel tank flush tank out with clean solvent Make sure tank is free of contaminates and debris Fuel Tank Removal Fig 7 1 Park machine on a level surface stop spray pump stop engine and engage parking...

Page 32: ...check valve is marked with an arrow indicating the direction of flow to the en gine intake manifold to assure proper installation NOTE If there is restriction in the fresh air filter the car bon canis...

Page 33: ...Multi Pro 1750 Page 3 15 Kohler Gasoline Engine This page is intentionally blank Kohler Gasoline Engine...

Page 34: ...t washer 7 10 Flange nut 8 11 Muffler mount 12 Muffler Clamp 13 Muffler mount 14 R Clamp 15 Muffler 16 Heat shield 17 Flange head screw 6 18 Tailpipe 19 Muffler bracket 20 Exhaust support bracket 21 H...

Page 35: ...anifold from the engine 6 Remove and discard exhaust gaskets from engine Installation Fig 10 NOTE Make sure engine and exhaust manifold seal ing surfaces are free of debris or damage that may pre vent...

Page 36: ...ount tube 4 13 Hex head screw 4 14 Hydraulics enable valve 15 Hydraulic hose 16 Hex head screw 17 Flat washer 18 External tooth lock washer 19 Main wire harness ground 20 Battery negative cable FRONT...

Page 37: ...ft accelerator cable from the ball stud B Loosen one of the two cable jam nuts that se cures accelerator cable to control bracket C Remove accelerator cable from the engine speed control bracket and p...

Page 38: ...rt the engine mounting plate assembly from below to prevent it from falling B Remove four 4 cap screws washers and flange nuts that secure the engine and pump mounting plate to the frame IMPORTANT Mak...

Page 39: ...battery negative cable and machine wire harness ground to engine base Fig 11 E Connect wire harness connector at spray pump electric clutch 8 Connect fuel line to the fuel pump on engine Con nect evap...

Page 40: ...ket adaptor 17 Belt sprocket 18 Woodruff key 19 Spacer 20 Flange nut 4 21 Flange head screw 4 22 Flat washer 2 23 Hex head screw 2 24 Engine and pump mounting plate FRONT RIGHT 27 to 33 ft lb 37 to 44...

Page 41: ...ly lift the engine assembly 5 Carefully lift engine from mounting plate 6 Remove hydraulic pump hub rubber coupling and drive sprocket components from engine crankshaft if necessary Locate and retriev...

Page 42: ...rubber coupler and install flange nuts Tighten flange nuts from 15 to 20 ft lb 20 to 27 N m CAUTION Engine and clutch assembly weighs approxi mately 175 lbs 79 kg Use an appropriate lifting device to...

Page 43: ...Multi Pro 1750 Page 3 25 Kohler Gasoline Engine This page is intentionally blank Kohler Gasoline Engine...

Page 44: ...ase shaft 25 Flange head screw 3 26 Release guide 27 Bearing support 28 Lock washer 6 29 Hex head screw 6 30 Output shaft 31 Square key 32 Retaining ring 33 Bearing 34 Hex head screw 6 35 R clamp 36 C...

Page 45: ...clutch cable from bracket Remove the return spring 5 Remove six 6 hex head screws item and clutch cable bracket securing bell housing assembly to adapter plate item 1 6 Support bell housing assembly a...

Page 46: ...key and flywheel on engine shaft Apply heavy duty thread locking compound ie loctite 271 to button head screw item 9 and install washer and button head screw Tighten screw from 35 to 40 ft lbs 47 to 5...

Page 47: ...tput shaft assembly into bearing support and install retaining ring item 32 2 Attach release guide item 26 to bearing plate with three 3 flange head screws Tighten screws from 90 to 120 in lbs 10 to 1...

Page 48: ...Multi Pro 1750 Page 3 30 Kohler Gasoline Engine This page is intentionally blank...

Page 49: ...Valve and Steering Cylinder Test 24 SERVICE AND REPAIRS 26 General Precautions for Removing and Installing Hydraulic System Components 26 Checking the Hydraulic Lines and Hoses 26 Flushing the Hydraul...

Page 50: ...ution 0 26 in3 4 27 cc Steering Boom Lift Circuit Relief Pressure 1000 PSI 69 bar Steering Control Valve Rotary valve steering unit with power beyond Sauer Danfoss series OSPM Displacement per revolut...

Page 51: ...Multi Pro 1750 Hydraulic System Page 4 3 This page is intentionally blank Hydraulic System...

Page 52: ...lic System Pressure Before disconnecting or performing any work on the hy draulic system all pressure in the hydraulic system must be relieved To relieve system pressure 1 Park machine on a level surf...

Page 53: ...the hose straight with one wrench and tighten the hose swivel nut onto the fitting with the second wrench see Hydraulic Hose and Tube Installation in this sec tion If the hose has an elbow at one end...

Page 54: ...t Wrench in the Torque Specifica tions section of Chapter 2 Product Records and Main tenance 5 If a torque wrench is not available or if space at the swivel nut prevents use of a torque wrench an alte...

Page 55: ...Maintenance to determine necessary con version information 5 If a torque wrench is not available or if space at the port prevents use of a torque wrench an alternate meth od of assembly is the Flats F...

Page 56: ...re than one full turn Step 3 in Fig ure 7 7 Hold the fitting in the desired position with a wrench and use a torque wrench to tighten the lock nut to the recommended installation torque shown in Figur...

Page 57: ...Bore 1 00 Rod 4 69 Stroke OR1 036 OR2 036 OR4 036 OR3 036 0 26 1 75 Bore 1 125 Rod 10 06 Stroke 1000 PSI T P C2 C1 C3 C4 RETRACT TO RAISE 3 7 GPM 1 75 Bore 1 125 Rod 10 06 Stroke STEERING CONTROL VAL...

Page 58: ...CYLINDER STEERING CYLINDER PISTON MOVEMENT RIGHT TURN 4 3 CID STEERING CONTROL VALVE L R E T P BOOM LIFT CONTROL VALVE TO FILTER TO OIL 4 3 CID STEERING CONTROL VALVE L R E T P BOOM LIFT CONTROL VALV...

Page 59: ...Left Turn When a left turn is made with the engine running the turning of the steering wheel positions the spool valve so that flow goes through the bottom of the spool Flow en tering the steering co...

Page 60: ...ore 1 125 Rod 10 06 Stroke T P C2 C1 C3 C4 RETRACT TO RAISE 1 75 Bore 1 125 Rod 10 06 Stroke RETURN TO FILTER AND RESERVOIR PUMP FLOW OR1 036 OR2 036 OR4 036 OR3 036 1 75 Bore 1 125 Rod 10 06 Stroke T...

Page 61: ...lift cylinder through a manifold check valve and orifice that controls lift speed The lift cylinder re tracts to raise the boom section Displaced oil from the barrel end of the lift cylinder re turns...

Page 62: ...mber TOR47009 Figure 11 Hydraulic Tester Pressure and Flow This tester requires O ring Face Seal ORFS adapter fittings for use on this machine see Hydraulic Test Fit ting Kit TOR4079 in this section 1...

Page 63: ...be replaced whenever a hy draulic connection is loosened Toro Part Number 117 2727 Figure 13 Hydraulic Test Fitting Kit This kit includes a variety of O ring Face Seal fittings to enable the connecti...

Page 64: ...to the Testing section of this chapter for precau tions and specific test procedures Problem Possible Cause Hydraulic oil leaks Fitting s hose s or tube s are loose or damaged O ring s or seal s are...

Page 65: ...is worn or damaged boom lift affected as well One of the spray booms does not raise or lower Affected spray boom pivot is worn binding or damaged Boom lift control manifold solenoid coil S2 or S3 or...

Page 66: ...cking worn or damaged Relief valve in hydraulic pump is faulty Hydraulic pump is worn or damaged steering circuit affected as well One of the spray booms will not remain in the raised position NOTE Li...

Page 67: ...ing hot hydraulic fluid CAUTION All testing should be performed by two 2 people One person should be in the seat to oper ate the machine and the other should read and record test results 1 Clean machi...

Page 68: ...c tester hoses to prevent moving machine parts from contacting and damaging the hoses or tester 8 Check fluid level in the hydraulic reservoir transaxle After connecting test equipment make sure reser...

Page 69: ...ING CONTROL VALVE ENABLE VALVE L R E T P HYDRAULICS 1 2 OIL FILTER TESTER energized on center TRANSAXLE RESERVOIR 3400 1400 RPM 27 HP 25 PSI 100 Mesh Screen 4 3 CID 0 26 1000 PSI STEERING CONTROL VALV...

Page 70: ...ontrol valve on tester until pressure gauge reads 800 PSI 55 bar Observe flow gauge TESTER READING Flow approximately 3 5 GPM D Release accelerator pedal and turn off machine Record test result 7 If p...

Page 71: ...Multi Pro 1750 Hydraulic System Page 4 23 This page is intentionally blank Hydraulic System...

Page 72: ...king Pressure Low Charge Pressure Return or Suction Flow TRANSAXLE RESERVOIR 3400 1400 RPM 27 HP 25 PSI 100 Mesh Screen 4 3 CID 0 26 1000 PSI STEERING CONTROL VALVE ENABLE VALVE L R E T P HYDRAULICS 1...

Page 73: ...he steering cylinder trunnion is fully extended C Turn the engine off and engage the parking brake D Read and follow the Precautions for Hydraulic Testing in this chapter E Clean the hose fitting and...

Page 74: ...add correct oil if necessary Drain and refill transaxle and change oil filter if component failure was severe or system is contami nated see Flush Hydraulic System in this section 2 Lubricate O rings...

Page 75: ...em fluid speci fied in Operator s Manual Dexron III ATF Other flu id could cause system damage 7 Fill transaxle with new fluid Dexron III ATF 8 Disconnect and ground spark plug wires to prevent engine...

Page 76: ...11 Set screw 2 12 Pump hub 13 Rubber coupler 14 Button head screw 4 15 Lock nut 16 Sprocket adaptor 17 Belt sprocket 18 Woodruff key 19 Spacer 20 Flat washer 2 21 Hex head screw 2 FRONT RIGHT 100 to 1...

Page 77: ...uare key item 9 from gear pump shaft 11 If hydraulic fittings are to be removed from gear pump mark fitting orientation to allow correct assembly Remove fittings from pump and discard O rings 1 Hydrau...

Page 78: ...4 5 Disassembling the Hydraulic Pump Fig 23 1 Install clean plugs in pump ports and clean the out side of the pump thoroughly After cleaning remove plugs and drain any oil out of the pump 2 Use a mar...

Page 79: ...move implement relief valve from rear cover Remove and discard sealing washers from relief valve Inspecting the Hydraulic Pump Fig 26 CAUTION Use eye protection such as goggles when using compressed a...

Page 80: ...cover and front cover Make sure that these surfaces are clean and dry 8 Install dowel pins in body IMPORTANT Do not dislodge O rings pressure seals or back up seals during final assembly 9 Gently sli...

Page 81: ...Multi Pro 1750 Hydraulic System Page 4 33 This page is intentionally blank Hydraulic System...

Page 82: ...nut 3 Flat washer 4 Steering wheel 5 Panel fastener 10 6 Dash 7 Hood 8 Cable tie 4 9 Dust cover 10 Hydraulic hoses 5 11 Cap screw 4 12 Steering control valve 13 Cap screw 3 14 Flat washer 3 Figure 27...

Page 83: ...move steering control valve from machine Installing the Steering Control Valve Fig 27 1 Position steering control valve to frame Secure steering column and control valve to frame with four 4 cap screw...

Page 84: ...ol 5 Bearing assembly 6 Shaft seal 7 Ball stop 8 Ball 9 Dust seal ring 10 Housing 11 Spring set 12 Cardan shaft 13 O ring 14 Distribution plate 15 Inner gearwheel 16 Outer gearwheel 17 End cover 18 O...

Page 85: ...Multi Pro 1750 Hydraulic System Page 4 37 This page is intentionally blank Hydraulic System...

Page 86: ...o 1750 Hydraulic System Page 4 38 Steering Cylinder 1 Steering cylinder 2 Ball joint 2 3 Retaining ring 2 4 Slotted hex nut 2 5 Cotter pin 2 Figure 30 FRONT RIGHT 80 to 90 ft lb 109 to 122 N m 1 2 3 4...

Page 87: ...to allow correct assem bly Remove fittings from cylinder and discard O rings Fig 31 6 Remove retaining rings and press ball joints from cylinder trunnions if necessary Installing the Steering Cylinde...

Page 88: ...ce 1 Barrel 2 Shaft trunnion 3 Shaft front 4 Roll pin 5 Piston 6 O ring 7 Seal 8 Wear ring 9 Head 2 10 Dust seal 2 11 O ring 2 12 Backup ring 2 13 Seal 2 14 Retaining ring 2 Figure 32 1 2 3 4 5 6 7 8...

Page 89: ...aper towels or cloth Lint in the hydraulic system will cause damage 2 Carefully inspect internal surface of barrel for dam age deep scratches out of round etc 3 Inspect shaft and piston for evidence o...

Page 90: ...wivel connector 6 Hydraulic fitting 7 Hydraulic fitting Figure 33 2 1 3 5 4 6 7 Hydraulics Enable Valve Service CAUTION Read and follow to the General Precautions for Removing and Installing Hydraulic...

Page 91: ...Multi Pro 1750 Hydraulic System Page 4 43 This page is intentionally blank Hydraulic System...

Page 92: ...7 Flange nut 6 8 Carriage screw 2 9 Cylinder mount plate 10 Stiffener plate machine serial no 315000001 up 11 Lock nut 2 12 Lift cylinder 2 13 Pivot pin 2 14 Flange head screw 2 15 Flange head screw...

Page 93: ...mount plate Remove control manifold from machine IMPORTANT A flow control orifice 0 036 is placed beneath the hydraulic fittings in control manifold ports C1 C2 C3 and C4 If any of these fittings is r...

Page 94: ...H boom 6 Nut 7 Solenoid valve S1 8 Check valve CV1 PC1 port 9 Solenoid coil S3 LH boom raise 10 Solenoid coil S3 LH boom lower 11 Solenoid coil S2 RH boom raise 12 Solenoid coil S2 RH boom lower 13 Nu...

Page 95: ...l manifold If booms are not fully raised as manifold components are loosened booms may drop unexpectedly See Cartridge Valve Service in this chapter Tighten cartridge valve and solenoid coil nut to sp...

Page 96: ...ng compressed air 3 Clean cartridge valve using clean mineral spirits Submerge valve in clean mineral spirits to flush out con tamination Particles as fine as talcum powder can affect the operation of...

Page 97: ...Multi Pro 1750 Hydraulic System Page 4 49 This page is intentionally blank Hydraulic System...

Page 98: ...Hydraulic System Page 4 50 Boom Lift Cylinders Figure 38 FRONT RIGHT 1 Hydraulic boom lift cylinder 2 2 Clevis pin 2 3 Cotter pin 2 4 Hydraulic hoses 5 Pivot pin 2 6 Flange nut 2 7 Flange head screw 2...

Page 99: ...cylin der ports to prevent contamination 5 Remove cotter pin item 3 and clevis pin item 2 that secure lift cylinder rod end to boom pivot bracket 6 Remove flange head screw item 7 and flange nut item...

Page 100: ...ft Cylinder Service Figure 39 6 8 9 10 11 13 5 7 12 14 15 160 ft lb 217 N m 1 Rod end 2 Jam nut 3 Shaft 4 Internal collar 5 Head 6 Dust seal 7 Shaft seal 8 Back up ring 9 O ring 10 Steel ring 11 O rin...

Page 101: ...nd O rings Assembling a Boom Lift Cylinder Fig 39 1 Make sure all cylinder parts are clean before as sembly 2 Coat all seat kit components with clean Dexron III ATF A Install seal and O ring to the pi...

Page 102: ...Multi Pro 1750 Hydraulic System Page 4 54 This page is intentionally blank...

Page 103: ...tch 35 Parking Brake Switch 36 Clutch Switch 37 Throttle Home Switch 37 Service Brake Switch 37 Neutral Switch 38 Traction Speed Sensor 39 Traction Speed Sensor 40 Master Boom Spray Enable Switch 41 B...

Page 104: ...elding on the machine disconnect the battery cables from the battery disconnect the wire harness connector from the Toro Electronic Controller and disconnect the terminal connector from the alternator...

Page 105: ...ielectric gel should be used to prevent corrosion of connection terminals To ensure complete coating of ter minals liberally apply gel to both component and wire harness connector plug connector to co...

Page 106: ...be used to test magneto ignitions on gasoline engines The spark tester determines if igni tion is present Toro Part Number TOR4036 Figure 4 Battery Hydrometer Use the Battery Hydrometer when measurin...

Page 107: ...this chapter 3 With sensor installed in transaxle connect traction speed sensor test harness between sensor and ma chine harness 4 Plug blue wire red test harness connector into the positive voltage p...

Page 108: ...c verify orien tation of grooves on sensor body The grooves must be aligned parallel to the flow meter body see Flow Meter Sensor in the Service and Repairs section of this chap ter If the sensor groo...

Page 109: ...between the Toro Electronic Controller TEC and the InfoCenter Use the InfoCenter Display to test TEC inputs and quali fiers when troubleshooting an electrical problem on your Multi Pro 1750 see Using...

Page 110: ...o No No No Status US Metric Language Protected Menus Protect Settings ANY L Boom C Boom 80 in 60 in R Boom Reset Defaults 80 in Item not visible until PIN has been entered Software version 122 0054J s...

Page 111: ...plash screen provides the following information to the operator S Voltmeter S Hourmeter After the splash screen has been displayed for eight seconds the main information screen will be appear on the I...

Page 112: ...master boom switch is ON and one or more spray boom switches are ON S Hill Assist Icon appears when hill assist is enabled and engaged S Throttle Lock Icon appears when throttle lock is active S Speed...

Page 113: ...he left back button again as indicated by the in the navigation pane Press center down button to display each additional sub area screen as indicated by the in the navigation pane To clear the applica...

Page 114: ...n pane Press the left back button once as in dicated by the in the navigation pane and adjust the tank volume or as necessary Press the left back but ton once to save your changes as indicated by the...

Page 115: ...he left back but ton as indicated by the at the bottom of the screen Test Speed Vehicle speed is an element necessary to calculate and maintain the desired application rate Use the right forward butto...

Page 116: ...llow the desired selection to remain in view for five 5 seconds The fault indicator will illuminate and an operator advisory 242 Value Saved will appear on the InfoCenter display to confirm that the c...

Page 117: ...tings is disabled Protect Settings Use the right forward button as indicated by the at the bottom of the screen to enable or disable the protected items When Protect Settings is disabled the remaining...

Page 118: ...number of hours that the engine has been running S Engine Service Identifies the number of hours remaining before the next recommended service If the correct personal identification number PIN has be...

Page 119: ...mp Switch Throttle Home Switch Spray Pump Clutch Momentary Rinse Switch optional rinse pump kit Timer optional rinse pump kit Rinse Pump optional rinse pump kit Timed Rinse Switch optional rinse pump...

Page 120: ...oCenter software is dis played and the CAN bus status will be visible Press the Center down button to scroll through the screen items as indicated by the at the bottom of the screen The information fo...

Page 121: ...Multi Pro 1750 Page 5 19 Electrical System This page is intentionally blank Electrical System...

Page 122: ...ine operations or are malfunctioning the fault indicator will illuminate and an advisory screen will appear on the InfoCenter Display Fig 22 Each advisory screen has three elements the advisory number...

Page 123: ...engaged 211 Throttle Speed lock prevented Clutch or service brake is engaged 212 Tank low volume alert 213 Rinse pump ON 220 Flow sensor calibration 221 Flow sensor calibration Fill water in tank and...

Page 124: ...nter Diagnostic Screen 3 Select highlight the malfunctioning machine opera tion and press the Right forward button as indicated by the at the bottom of the screen For this example the Pumps operation...

Page 125: ...t highlight Outputs and press the Right forward button as indicated by the at the bottom of the screen 9 If all the Inputs are ON and all the Qualifiers are in their desired condition the Outputs for...

Page 126: ...power relay or circuit wiring is faulty 4 Charging system or circuit wiring is faulty 5 Start relay or circuit wiring is faulty 6 Kill relay circuit is faulty 7 Spray pump clutch or circuit wiring is...

Page 127: ...Multi Pro 1750 Page 5 25 Electrical System This page is intentionally blank Electrical System...

Page 128: ...ot in the neutral position Advisory will be displayed on InfoCenter Display Operator seat is not occupied and parking brake is not engaged Advisory will be displayed on InfoCenter Display Accelerator...

Page 129: ...cal Drawings Circuit wiring to carburetor solenoid is loose corroded or damaged see Chapter 10 Electrical Drawings Engine or fuel system is malfunctioning see Chapter 3 Kohler Gasoline Engine Engine m...

Page 130: ...charge and battery temperature the charging system voltage will increase at different rates as the battery charges Start the engine and run at high idle 3350 to 3450 RPM Allow the battery to charge fo...

Page 131: ...rake en gaged the range selector must be in the neutral posi tion the accelerator pedal must be released to the HOME position and the spray pump switch must be OFF Neutral switch operation is describe...

Page 132: ...chematic and wire harness drawings in Chapter 10 Electrical Drawings for additional fusible link information Testing Make sure that ignition switch is OFF and disconnect the negative battery cable fro...

Page 133: ...ould be displayed on the InfoCenter Display if this fuse is faulty Middle column 3rd from top fuse 7 5 amp protects TEC output power supply for brake lock and optional brake light Fault code 2 should...

Page 134: ...pray pump running indicator light throttle lock coil throttle lock indicator light master boom valve and brake lock system Outputs from the TEC are also used for the rinse pump relay and brake light i...

Page 135: ...gital multimeter or test light NOTE The TEC and the InfoCenter used on the Multi Pro 1750 are matched for correct machine operation If either of these components are replaced for any reason system sof...

Page 136: ...s connector from switch 3 The ignition switch terminals are identified as shown in Figure 33 With the use of a multimeter ohms setting the switch functions can be tested to determine whether continuit...

Page 137: ...and support operator seat to access seat switch 3 Disconnect wire harness electrical connector from the seat switch under the operator seat Fig 35 4 Check the continuity of the switch by connecting a...

Page 138: ...e on a level surface stop spray pump stop engine and engage parking brake Remove key from ignition switch 2 Raise and support operator seat to access parking brake switch connector 3 Disconnect the wi...

Page 139: ...nal brake light Testing The clutch and throttle home switch and their circuit wir ing can be tested as TEC qualifiers using the InfoCenter Display see InfoCenter Display Diagnostics Screen in this cha...

Page 140: ...face stop spray pump stop engine and engage parking brake Remove key from ignition switch 2 Locate neutral switch on the front of the transmis sion Disconnect the wire harness connector from the switc...

Page 141: ...he sensor connector gray striped wire terminal and the negative multimeter lead to the connector black wire terminal Fig 40 Set multimeter to ohms setting IMPORTANT Incorrect jumper wire connections d...

Page 142: ...ness from speed sen sor 3 Test the machine wire harness to the speed sensor A Set the ignition switch to the RUN PREHEAT po sition B Connect a jumper wire across the ground pin C and the signal pin B...

Page 143: ...circuit wiring can be tested as a TEC input using the InfoCenter Display see InfoCenter Display Diagnostics Screen in this chapter If testing determines that the switch and circuit wiring are not fun...

Page 144: ...ring are not functioning correctly proceed with the following test procedure 1 Park machine on a level surface stop spray pump stop engine and engage parking brake Remove key from ignition switch 2 Re...

Page 145: ...esting determines that the switches and cir cuit wiring are not functioning correctly proceed with the following test procedure 1 Park machine on a level surface stop spray pump stop engine and engage...

Page 146: ...The spray pump switch and its circuit wiring can be tested as a TEC input or qualifier using the InfoCenter Display see InfoCenter Display Diagnostics Screen in this chapter If testing determines that...

Page 147: ...3 With the use of a multimeter ohms setting the ap plication rate switch functions may be tested to deter mine whether continuity exists between the various terminals for each switch position The swit...

Page 148: ...arious terminals for each switch position The switch terminals are marked as shown Fig 57 The circuitry of the supervisor key switch is shown in the chart Fig 58 Verify continuity between switch termi...

Page 149: ...ire harness connector from switch 3 With the use of a multimeter ohms setting the boom lift switch functions may be tested to determine whether continuity exists between the various terminals for each...

Page 150: ...ting determines that the switch and circuit wiring are not functioning correctly proceed with the fol lowing test procedure 1 Park machine on a level surface stop spray pump stop engine and engage par...

Page 151: ...ists between the various terminals for each switch position The switch terminals are marked as shown Fig 66 and the circuitry of the headlight switch is shown in the chart Fig 67 Verify continuity bet...

Page 152: ...ate the brake pres sure switch Unplug wire harness connector from switch 3 With the use of a multimeter ohms setting the brake pressure switch may be tested to determine whether continuity exists acro...

Page 153: ...ay and re move the relay from the machine 3 The relay terminals are marked as shown Fig 70 NOTE Prior to taking small resistance readings with a digital multimeter short the meter test leads together...

Page 154: ...operator seat and locate the relay to be tested Disconnect wire harness connector from relay and re move relay from panel 3 The relay terminals are marked as shown Fig 72 NOTE Prior to taking small r...

Page 155: ...ts correctly and a circuit problem still exists check wire harness see Electrical Schematic and Wire Harness Drawings in Chapter 10 Electrical Drawings in this manual 10 Secure relay to machine and co...

Page 156: ...el surface stop spray pump stop engine and engage parking brake Remove key from ignition switch 2 Locate control coil next to accelerator lever under the floorboard Unplug coil connector from machine...

Page 157: ...leads together The meter will display a small resistance value usually 0 5 ohms or less This resistance is due to the internal resistance of the meter and test leads Subtract this val ue from from the...

Page 158: ...Carefully unplug machine wire harness connector from valve ac tuator and disconnect the hose from below the valve Two 2 wire operated actuators A Connect 12VDC to terminal 1 and connect ter minal 2 t...

Page 159: ...in a clockwise direction stop and a red LED should illuminate B Connect 12VDC to terminal A red wire and ter minal C open white wire then connect terminal B to ground black wire The actuator should ro...

Page 160: ...e slightly different than listed at different tempera tures Typically a failed solenoid coil will either be shorted very low or no resistance or open infinite re sistance 3 Using a multimeter ohms set...

Page 161: ...ical system operation Termination Resistor Test The terminator resistors Fig 80 can be tested using a digital multimeter ohms setting There should be 120 ohms resistance between terminals A and B of t...

Page 162: ...e parking brake 2 Disconnect machine wire harness from flow meter sensor 3 Test the machine wire harness to the flow meter sen sor A Set the ignition switch to the RUN PREHEAT po sition B Set the spra...

Page 163: ...brake Remove key from ignition switch 2 Remove console panel Locate rinse kit switch and unplug machine wire harness connector from switch 3 With the use of a multimeter ohms setting the speed throttl...

Page 164: ...eter ohms setting the switch functions may be tested to determine whether continuity exists between the various terminals for each switch position The switch terminals are marked as shown Fig 88 and t...

Page 165: ...ine whether continuity exists between the various terminals for each switch position The switch terminals are marked as shown Fig 91 and the circuitry of the switch is shown in the chart Fig 92 Verify...

Page 166: ...kit switch functions may be tested to determine whether continuity exists across the terminals for each switch position Continuity zero ohms resistance should exist across the switch terminals when th...

Page 167: ...d electrical sparks away from the battery do not smoke Nausea may result if the gases are inhaled Unplug char ger from electrical outlet before connecting or disconnecting charger leads to or from bat...

Page 168: ...attery on the battery base with its posts toward the right side of the machine 3 Secure positive cable red to positive battery post with cap screw and flange nut 4 Connect a digital multimeter set to...

Page 169: ...battery voltage reading at fifteen 15 se conds then remove the load H Using the table in the column to the right deter mine the minimum voltage for the battery tempera ture reading If the test voltag...

Page 170: ...en battery because it can ex plode and cause injury Let the battery warm to 60oF 16oC before connecting to a charger Charge the battery in a well ventilated place to dissipate gases produced from char...

Page 171: ...against sensor hex head 2 Thread sensor into flow meter body until bottom of sensor jam nut is 0 38 in 9 6 mm form flow meter body 3 Turn sensor out counterclockwise until orientation groove on top o...

Page 172: ...bulb from the headlight by rotating it 1 4 turn counter clockwise Then grasp bulb base and remove bulb from the head light Do not touch the clear bulb surface when removing bulb 4 If necessary remove...

Page 173: ...t 31 to 39 ft lb 43 to 52 N m 90 to 110 in lb 10 2 to 12 4 N m Loctite 242 Loctite 242 1 Spray pump 2 Flange nut 3 Cap screw 4 Cap screw 4 5 Lock washer 4 6 Clutch sprocket 7 Cap screw 8 Lock washer 9...

Page 174: ...y Installation Fig 97 1 Apply antiseize lubricant to pump input shaft Make sure that retaining ring on pump shaft is fully seated in shaft groove 2 If spacer item 11 was removed from pump shaft slide...

Page 175: ...anifold Assembly Serial Number Below 315000000 22 Spray Control Manifold Assembly Serial Number Above 315000000 24 Flowmeter 26 Flowmeter Service 28 Boom Spray Valve Manifold Assembly Serial Number Be...

Page 176: ...manufacturer s labels before handling chemicals In structions on chemical manufacturer s container labels regarding mixing proportions should be read and strictly followed 3 Keep spray material away f...

Page 177: ...he operator to adjust electrical current to the regulating rate control valve motor located behind the spray tank Higher current res ults in a pressure rate increase and lower current results in a pre...

Page 178: ...Multi Pro 1750 Page 6 4 Spray System Spray System Flow Diagrams Spray System Flow Diagram Multi Pro 1750 Serial Number Below 315000000 PRESSURE GAUGE 218 PSI 15 Bar SUCTION STRAINER...

Page 179: ...Multi Pro 1750 Page 6 5 Spray System Spray System Flow Diagram Multi Pro 1750 Serial Number Above 315000000 PRESSURE GAUGE 218 PSI 15 Bar SUCTION STRAINER PRESSURE FILTER Spray System...

Page 180: ...creen in tank is plugged Spray pump suction line has an air leak Suction tube in spray tank has air leak Suction line is restricted Spray pressure decreases while operating sprayer Suction line is res...

Page 181: ...eration from booms Suction screen in spray tank is plugged Pressure filter is plugged machine serial number above 315000000 Spray nozzle s are clogged or damaged Boom bypass valves are not adjusted co...

Page 182: ...ive belt tension until belt deflection is 0 38 in 9 5 mm at 10 lb kg force applied half way between the engine and spray pump sprockets Tighten belt to 73 to 75 hertz if using a sonic tension meter 3...

Page 183: ...Multi Pro 1750 Page 6 9 Spray System This page is intentionally blank Spray System...

Page 184: ...djusting screw 5 Idler pulley 6 Drive pulley 7 Square head set screw 2 8 Key 9 Hydraulic pump assembly 10 Lock nut 2 11 Flat washer 2 12 Flat washer 2 13 Cap screw 2 Figure 2 FRONT RIGHT 27 to 33 ft l...

Page 185: ...fasteners securing hydraulic pump assem bly item 9 to engine and pump mounting plate Slide pump assembly from pump hub and set aside 6 Remove drive belt Drive Belt Installation Fig 2 1 Install drive b...

Page 186: ...over 6 Right fender assembly 7 Left fender assembly 8 Hex head screw 7 9 Flat washer 7 10 Panel fastener 4 11 Parking brake assembly 12 Carriage bolt 2 13 Flange nut 2 14 Flange head screw 2 15 Flange...

Page 187: ...to engine and pump mounting plate Fig 4 CAUTION Spray pump assembly weighs approximately 140 lbs 59 kg Use an appropriate lifting device to safely lift the pump assembly 11 Use the lifting strap provi...

Page 188: ...Grease fitting 20 Crank shaft 21 Metal spacer 2 22 Ball bearing 2 23 Counterbalance 24 Counterbalance 25 Allen bolt 3 26 Pump valve with hole 2 27 Hex bolt 3 28 Pump casting Figure 5 2 3 6 8 9 10 11...

Page 189: ...ves inlet and outlet and valve O rings from pump During valve removal note location and orientation of valves 6 Remove hex bolt diaphragm disc diaphragm and diaphragm backing disc from each connecting...

Page 190: ...ankshaft Makes sure that rod flange fits under metal spacer that is installed in housing 16 Place second metal spacer onto crankshaft and con necting rods and then install pump casting Make sure that...

Page 191: ...Multi Pro 1750 Page 6 17 Spray System This page is intentionally blank Spray System...

Page 192: ...Pressure connection at pump 10 Suction connection at pump 11 Agitation valve 12 Agitation bypass valve 13 Rate control valve 14 Master boom valve 15 Left boom valve 16 Left boom bypass valve 17 Cente...

Page 193: ...on connection at pump 11 Rate control valve 12 Agitation valve 13 Agitation bypass valve 14 Master boom valve 15 Master boom bypass valve 16 Left boom valve 17 Left boom bypass valve 18 Center boom va...

Page 194: ...y sys tem pressure exceeds the pressure limit of 218 PSI 15 Bar the valve opens and spray product is directed to the spray tank Replace the pressure relief valve if sys tem pressure exceeds the pressu...

Page 195: ...Multi Pro 1750 Page 6 21 Spray System This page is intentionally blank Spray System...

Page 196: ...20 O Ring T3 4 21 Straight fitting 3 22 Hose to spray booms 3 23 Bypass valve 24 O Ring T5 2 25 Straight fitting 26 Cap 27 Fork 2 28 Hose clamp 29 Hose to tank Figure 11 FRONT RIGHT 1 2 3 4 5 6 7 8 9...

Page 197: ...sembly from ma chine 5 Remove bypass valve from agitation valve The by pass valve is not repairable Replace bypass valve if necessary 6 Disassemble spray control manifold as needed Dis card any remove...

Page 198: ...Agitation valve 27 Agitation bypass valve 28 Master boom valve 29 Master boom bypass valve 30 Flange head screw 6 31 Actuator fork 3 32 Hose adapter 33 Hose to pump 34 Flange head screw 3 Figure 12 FR...

Page 199: ...and hex head screws that secure the pressure filter to the mounting plate Remove spray control manifold assembly from machine 5 Disassemble spray control manifold as needed Dis card any removed O ring...

Page 200: ...urface stop spray pump stop engine and engage parking brake Remove key from ignition switch 2 Disconnect wire harness connector from flowmeter IMPORTANT Note the direction of the arrow on top of flowm...

Page 201: ...Multi Pro 1750 Page 6 27 Spray System This page is intentionally blank Spray System...

Page 202: ...ce 1 Flowmeter body 2 Rotor magnet assembly 3 Upstream hub and bearing 4 Downstream hub 5 Retaining ring 2 6 Sensor assembly 7 Turbine stud with bearing 8 Cable clamp 9 Screw Figure 15 2 3 7 8 9 1 5 6...

Page 203: ...ealant to threads of stud before instal lation B Check that rotor spins freely with very little drag If necessary loosen the turbine stud 1 16 of a turn and check rotor drag Continue the process of lo...

Page 204: ...ight fitting 3 23 Hose clamp 3 24 Hose to left spray boom 25 Hose to center spray boom 26 Hose to right spray boom 27 Fork 3 28 O Ring 3 29 Fork T3 4 30 Cap 31 O Ring T3 4 32 Bypass valve 3 33 Elbow 3...

Page 205: ...ld assembly The bypass valves are not repairable Replace bypass valves if necessary 8 Disassemble boom spray valve manifold as needed Discard any removed O rings and gaskets NOTE See Spray Valve Servi...

Page 206: ...13 Flange head screw 4 14 Valve actuator On Off 3 15 Boom spray valve 3 16 Elbow 17 Tube to pressure gauge 18 Tube fitting 19 Cap 20 Hose to tank 21 Hose to left spray boom 22 Clamp 4 23 Hose to cente...

Page 207: ...nge head screws that secure boom spray valve manifold to mounting plate Remove boom spray valve manifold from machine 7 Disassemble boom spray valve manifold as needed Discard any removed O rings and...

Page 208: ...re to not damage wires and tighten screws Piston Assembly Service Fig 20 1 Remove the fork and hose barb from bottom of valve to allow access to piston assembly 2 Make sure that valve is closed piston...

Page 209: ...ise unscrew and remove the end caps 4 Rotate the valve stem until the slot in the stem and valve ball are in line with the valve body and remove the valve ball 5 Remove the valve stem fork seat and re...

Page 210: ...ass valves if necessary IMPORTANT Make sure to remove and neutralize chemicals from spray components before removing the pressure relief valve Wear protective clothing chemical resistant gloves and ey...

Page 211: ...clockwise unscrew and remove the knob 3 Remove and discard the two 2 O rings from the valve stem 4 Remove valve body forks and separate bypass valves Remove and discard O rings Assembly Fig 23 1 Insta...

Page 212: ...e from agitation valve Figure 24 Thread Sealant Thread Sealant 1 2 3 4 5 2 3 The agitation throttle valve is a non adjustable non re pairable component Replace the valve if necessary IMPORTANT Make su...

Page 213: ...ll 5 Remove the valve stem fork seat and remove the valve stem assembly Assembly Fig 25 1 Inspect the end cap and the stem seals and O rings Replace components as necessary 2 Apply silicone grease to...

Page 214: ...rotective clothing chemical re sistant gloves and eye protection during repair 1 Park machine on a level surface stop spray pump stop engine and engage parking brake Remove key from ignition switch 2...

Page 215: ...d engage parking brake Remove key from ignition switch 2 Drain spray tank 3 Label hoses to for proper installation Remove hoses from bypass fittings in tank 4 Disassemble bypass fittings in tank Disca...

Page 216: ...clamp 9 Hose to spray pump 10 Fork 4 11 Connector 12 Filter adapter 13 O Ring 14 Screen vane 15 Strainer screen 16 Suction filter body 17 Fork 18 O Ring 19 Spring pin 2 20 Straight fitting 21 Gasket 2...

Page 217: ...ved O rings and gaskets 7 Measure and record the length of suction tube prior to disassembly Fig 29 Disassemble suction tube suc tion filter assembly as needed Figure 29 MEASURE AND RECORD LENGTH Inst...

Page 218: ...djustable non re pairable component Replace the valve if necessary Assembly Fig 30 NOTE Replace all removed O rings and gaskets Coat all O rings with vegetable oil before installation to reduce the ch...

Page 219: ...Multi Pro 1750 Page 6 45 Spray System This page is intentionally blank Spray System...

Page 220: ...ank strap rear 2 3 Tank strap front 2 4 Hair pin 4 5 Hex head screw 2 6 Flat washer 4 7 Lock nut 2 Figure 31 FRONT RIGHT 1 2 3 4 5 6 7 2 3 4 4 4 6 5 6 6 7 NOTE For better service access to the engine...

Page 221: ...hs approximately 120 lbs 54 kg when empty Use an appropriate lifting device to safely lift the spray tank assembly 8 Raise spray tank assembly from machine Installation Fig 31 1 Make sure that pads on...

Page 222: ...9 9 13 Removal Fig 32 IMPORTANT Make sure to remove and neutralize chemicals from spray components before disas sembly Wear protective clothing chemical resist ant gloves and eye protection during rep...

Page 223: ...The end of the turret with the slightly larger bore has detent grooves Fig 34 The detent grooves need to align with the detent posts on the body B Make sure to align notch on plug item 10 with groove...

Page 224: ...emove and neutralize chemicals from spray components before disas sembly Wear protective clothing chemical resist ant gloves and eye protection during repair 1 Park machine on a level surface stop spr...

Page 225: ...ot bracket hinge Make sure that rubber boots item 18 are placed at hinge junctions and that ribs on boots are toward the top of the boom Fig 37 4 Insert two 2 cap screws item 10 through flat wash ers...

Page 226: ...Multi Pro 1750 Page 6 52 Spray System This page is intentionally blank...

Page 227: ...DJUSTMENTS 6 Adjusting Shift Cables 6 Adjusting Differential Lock Cable 6 SERVICE AND REPAIRS 8 Control Cable Replacement 8 Rear Wheel Driveshafts 12 Transaxle Driveshaft 14 Driveshaft Cross and Beari...

Page 228: ...ons Item Description Transmission Integrated Transaxle with 3 Forward Speed Ranges and Reverse Mechanical Clutch and Manual Engage Differential Lock Fluid Capacity also functions as hydraulic reservoi...

Page 229: ...differential lock feature The transaxle is a constant mesh collar shift transmission with synchro nizers for speed ranges 1 2 and 3 Two 2 shift cables from the shift lever assembly on the operator con...

Page 230: ...of adjustment Shift cable damaged Range selector cap screw loose at operator console Cable clamp securing cables near range selector is loose Loose shift lever on transaxle Sliding gear tight on trans...

Page 231: ...plines Synchronizer shift keys in transaxle are damaged Transaxle slips out of gear Shift linkage out of adjustment Transaxle gear loose on shaft Worn or damaged teeth on transaxle gear Excessive end...

Page 232: ...cable clevis hole aligns with hole in transaxle shift lever 5 Secure cable clevises to shift levers with clevis pins and cotter pins 6 Check range selector for proper shift cable opera tion Figure 2...

Page 233: ...Multi Pro 1750 Page 7 7 Drive Train This page is intentionally blank Drive Train...

Page 234: ...Rear switch panel 5 Flange head screw 4 6 Shift knob 7 Jam nut 8 Shift boot 9 Foam seal 10 Cable clamp 11 1st Reverse shift cable 12 2nd 3rd shift cable 13 Hair pin 3 14 Clevis 2 15 Clevis pin 3 16 Ja...

Page 235: ...tallation Fig 4 1 Route shift cable in same location as recorded dur ing cable removal Pass threaded end of cable through lower shift boot 2 Install cable clevis item 14 onto front of shift cable so c...

Page 236: ...onnect cable from bracket on transaxle C Remove spring from differential lock lever on transaxle 7 Record routing of differential lock cable and location of cable ties used to secure cable to machine...

Page 237: ...Multi Pro 1750 Page 7 11 Drive Train This page is intentionally blank Drive Train...

Page 238: ...Hub support 11 Brake rotor 12 Spindle nut 13 Cap screw 4 14 Flange nut 4 15 Flange head screw 2 16 Splined shaft 17 Lock nut 2 18 Cap screw 2 Figure 7 2 3 6 9 1 8 10 4 7 FRONT RIGHT Antiseize Lubrica...

Page 239: ...bricant to splined shaft and install into driveshaft B Clean threads of splined shaft with solvent and apply heavy duty thread locking compound ie Loc tite 271 to threads C Install flange nut item 5 o...

Page 240: ...ove lock nuts and cap screws securing driveshaft to output shaft at bell housing Remove set screw item 6 from yoke and then slide driveshaft yoke from shaft Locate and retrieve square key Driveshaft I...

Page 241: ...s A Apply a coating of grease to bearing bores of end yoke and shaft yoke Also apply grease to bearings and seal of bearing assembly Make sure that all bearing rollers are properly seated in bearing c...

Page 242: ...LH shown 13 Wheel bearing hub 14 Hub support 15 Brake rotor 16 Spindle nut 17 Cap screw 4 18 Flange nut 4 19 Flange head screw 2 20 Splined shaft Figure 11 2 3 6 8 9 10 13 1 7 12 14 4 11 5 FRONT RIGHT...

Page 243: ...tion hose away from transaxle 10 Put caps or plugs on all open hoses and fittings to prevent contamination 11 Remove two 2 cap screws and lock nuts from transaxle end of transaxle driveshaft assembly...

Page 244: ...priate lifting device to safely lower the transaxle assembly 19 Support transaxle to prevent it from shifting or falling Remove two 2 cap screws that secure top of transaxle to machine frame item 11 R...

Page 245: ...m 8 Apply antiseize lubricant to the splined shaft item 20 9 Install wheel hub and bearing assembly item 13 over the splined shaft Install the four 4 flange head screws and flange nuts that secure the...

Page 246: ...Cable Adjustment in this chapter 20 Install the speed sensor if previously removed Plug speed sensor connector into wire harness 21 Install the neutral switch if previously removed see Neutral Switch...

Page 247: ...head screws and remove fork shaft case from center plate Note location of longer flange head screw Be careful when removing cover as steel balls inside are spring loaded 1 3 2 2 2 1 Flange head screw...

Page 248: ...nap ring from cen ter plate C Remove input shaft cover and seal from center plate Discard seal 1 4 2 3 1 Seal cap 2 Shims 3 Shim 4 Snap ring 5 Input shaft cover 6 Input shaft seal Figure 18 5 6 6 Remo...

Page 249: ...from L H side cover still at tached to transaxle 1 Flange head screw 5 2 L H axle shaft assembly 3 Shims 4 L H Side cover Figure 22 10 Remove roll pin from differential lock lever and re move lever f...

Page 250: ...saxle case 1 2 1 Flange head screw 4 2 R H Axle shaft assy Figure 24 14 Remove differential gear assembly together with fork shaft assembly 1 2 1 Differential gear assy 2 Fork shaft assy Figure 25 15...

Page 251: ...ransaxle case and dis card seals E Inspect shift arms and keeper plates for bending or damage and replace if necessary 1 Nut 2 2nd 3rd shift arm 3 Shift arm plate 4 Spring 5 Lock nut 6 Washer 7 Cap sc...

Page 252: ...Oil cap 2 Air breather Figure 30 20 If necessary remove flange head screw and slide speed sensor from upper cover 21 Loosen flange head screws and remove upper cover from transaxle case 22 Remove oil...

Page 253: ...needle bearings and washer Inspect needle bearings and replace if necessary J Use a bearing puller to remove bearing item 14 K Remove remaining gears and snap ring 1 Bearing 2 Snap ring 3 Washer 4 Ge...

Page 254: ...d replace if necessary Measure thickness of thrust washer Replace thrust washer if thickness is less than 0 0709 in 1 8 mm 1 Bearing 2 Helical gear 3 Collar 4 Gear 5 Bearing 6 Washer 7 Gear 8 Needle b...

Page 255: ...etaining ring C Remove countershaft gear D Remove retaining ring and collar from shaft E Use a bearing puller to remove two 2 bearings from shaft 1 Bearing 2 Collar 3 Gear 4 Collar 5 Retaining ring 6...

Page 256: ...rom differential case H Remove differential pinions and liners I Remove L H side gear R H side gear and liners 1 Bearing 2 Snap ring 3 Bearing 4 Diff lock slider 5 Screws 6 Ring gear 7 Dowel pin 2 8 L...

Page 257: ...e shaft assembly D Remove snap ring and washer E Use a bearing puller to remove bearing from axle shaft F Remove oil seal from differential carrier L H AXLE SHAFT 2 3 6 8 1 5 7 4 1 O ring 2 Snap ring...

Page 258: ...er ring Figure 44 4 Inspect synchro gears A Inspect the cone surface for roughness material transfer brass color material or damage B Inspect the spline chamfer for excessive chipping or damage C Insp...

Page 259: ...ring 4 Fork Figure 47 4 3 2 1 CLEARANCE 6 Inspect main shaft A Inspect main shaft for worn or damaged surfaces If O D of needle bearing surface is less than 0 864 in 21 95 mm replace the main shaft B...

Page 260: ...dle bearing area is less than 0 864 in 21 95 mm or inner needle bearing area is less than 0 982 in 24 95 mm replace the reduction shaft 1 Reduction shaft 2 Outer bearing area 3 Inner bearing area Figu...

Page 261: ...easure thickness of side gear liners If thick ness is less than 0 043 in 1 1 mm replace the side gear liners D Inspect the gear contact condition between spiral bevel pinion and ring gear E Inspect di...

Page 262: ...ifferential carrier Figure 55 3 Assemble R H axle shaft A Install new oil seal into seal cover Apply multi purpose grease on O ring before installing B Insert washer C Use a press to install bearing o...

Page 263: ...ews are removed that they be replaced with new screws J Apply Loctite to threads of cap screws K Clean oil from contact surface of differential case and ring gear L Drive ring gear onto differential c...

Page 264: ...shaft Pay atten tion to direction of slit in lock pin 1 Lock pin 2 Shift fork 3 Fork shaft Figure 61 7 Assemble countershaft A Use a press to install two 2 new bearings onto countershaft B Install co...

Page 265: ...nchro hub A Install keys into grooves of hub 1 2 1 Key 3 2 Hub Figure 63 B Install shifter onto hub 1 2 1 Shifter 2 Hub Figure 64 C Insert springs into hub Pay attention to direction of spring 1 Key 3...

Page 266: ...I Install gear item 4 collar and gear item 1 onto shaft J Use a press to install bearing onto shaft 1 Bearing 2 Helical gear 3 Collar 4 Gear 5 Bearing 6 Washer 7 Gear 8 Needle bearing 9 Retaining ring...

Page 267: ...bearings into gear Apply moly dis ulfide grease onto needle bearings before installing L Install gear with synchro ring onto main shaft M Install washer and snap ring Apply moly disulfide grease to wa...

Page 268: ...uts Tighten shift arm retaining lock nuts to a torque from 230 to 240 in lb 26 to 27 N m 1 Cap screw 2 2 Keeper plate 2 3 Oil seal 2 Figure 72 3 1 2 3 1 2 11 to 13 ft lb 15 to 17 N m 230 to 240 in lb...

Page 269: ...countershaft assembly into transaxle case Insert head of shift arm into groove of fork when installing the assembly NOTE Not used on Multi Pro Figure 76 17 Assemble main shaft together with 2nd 3rd fo...

Page 270: ...transaxle D Install and tighten fifteen 15 flange head screws to a torque from 18 to 22 ft lb 25 to 29 N m E Apply multi purpose grease onto lips of oil seal then insert oil seal flush with face of h...

Page 271: ...1750 Page 7 45 Drive Train 22 Install snap ring into the groove of the bearing hous ing 1 Countershaft 2 Bearing 3 Shims 4 Retaining ring 5 Center plate 6 Sealing cap Figure 82 1 5 3 6 4 2 Figure 83 D...

Page 272: ...asurement End play should be from 0 000 to 0 0039 in 0 00 to 0 10 mm IMPORTANT If end play is too great replace shim shim set with thicker shims to allow correct end play If end play is too small repl...

Page 273: ...case E Install fork shaft case Install and tighten flange head screws to a torque from 18 to 22 ft lb 25 to 29 N m F Check operation of shifters and detent 1 3 2 2 2 1 Flange head screw 1 2 Flange he...

Page 274: ...r A Insert dowel pins onto transaxle case B Apply multi purpose grease on lip of oil seal and install new differential lock shaft oil seal in side cover C Apply silicone sealant onto mating surface of...

Page 275: ...o 22 ft lb 25 to 29 N m 2 1 18 to 22 ft lb 25 to 29 N m Figure 93 30 Install L H axle shaft assembly A Thoroughly clean mating surface of differential carrier and side cover B Insert selected shims in...

Page 276: ...set until correct backlash is achieved B If backlash exceeds the target range increase to tal thickness of shim set until correct backlash is achieved NOTE The thickest shim should be installed agains...

Page 277: ...into upper cover and secure with cap screw and lock washer Figure 99 1 Flange head screw 2 Speed sensor 3 Flange head screw 4 4 Upper cover 5 Oil seal 1 2 3 4 5 18 to 22 ft lb 25 to 29 N m 37 Apply mu...

Page 278: ...Multi Pro 1750 Page 7 52 Drive Train This page is intentionally blank...

Page 279: ...dal 8 Adjusting Front Suspension 9 SERVICE AND REPAIRS 10 Wheel Assemblies 10 Front Brakes 11 Rear Brakes 12 Service Brake Caliper Service 14 Parking Brake Caliper Service 16 Brake Lines 17 Parking Br...

Page 280: ...re pressure 20 PSI 138 kPa Maximum 20 x 10 10 tubeless Rear tire pressure 20 PSI 138 kPa Maximum 24 x 13 12 tubeless Front wheel lug nut torque 75 to 80 ft lb 102 to 108 N m Rear wheel lug nut torque...

Page 281: ...maintenance intervals for your Multi Pro 1750 machine Refer to this publication for additional information when servicing the machine Parts Catalog The Parts Catalog can be used to provide disassembly...

Page 282: ...r which changes the length of the shock spring to affect front wheel camber Make sure that vehicle is jacked up off the ground to allow shock spring to be at full exten sion before using spanner wrenc...

Page 283: ...loose Front wheel bearings are loose or worn Steering linkage is loose or worn Tie rod ends are worn Control arm bushings are loose or worn Vehicle is unstable or wanders Tire pressure is low or unev...

Page 284: ...damaged boom lift affected as well Vehicle pulls to one side when not braking Tire pressure is low or uneven between tires Front wheel alignment toe in is incorrect Steering or suspension component m...

Page 285: ...edal is binding Parking brake cable is binding Brake pads are saturated Brake rotors are bent or out of round Brake pedal is hard to push Incorrect brake pad material Brake pedal linkage is binding Wh...

Page 286: ...leased 1 Remove the cotter pin and clevis pin from the master cylinder clevis 2 Loosen the jam nut securing the clevis to the master cylinder shaft 3 With the brake pedal resting against the hard peda...

Page 287: ...cks can be adjusted with the ma chine on the ground but is easier when the front of the machine is safely lifted off the ground 1 Chock rear wheels to prevent vehicle from shifting Lift front of machi...

Page 288: ...ved 3 Jack wheel that is to be removed off the ground see Jacking Instructions in Chapter 1 Safety in this manu al Support raised machine with jack stands 4 Remove lug nuts and wheel assembly Wheel In...

Page 289: ...nt wheel hub and brake rotor if they were removed see Front Wheel Hubs in this chapter 3 Slide front brake caliper onto brake rotor Make sure that rotor is between brake pads 4 Align caliper with moun...

Page 290: ...heel from vehicle see Wheel Assemblies in this chapter Make sure that vehicle is supported with jack stands NOTE Brake caliper can be removed from brake rotor without removing brake line from caliper...

Page 291: ...assembly bracket cable and parking brake caliper onto brake rotor Make sure that rotor is between brake pads B Secure parking brake bracket to rear axle with two 2 cap screws and flange nuts Tighten f...

Page 292: ...7 Piston 2 8 Brake pad 2 9 Caliper anvil Figure 8 2 3 6 8 1 5 7 4 37 to 44 N m 27 to 33 ft lb BAF 12 Assembly Lube White Lithium Grease 9 NOTE The Multi Pro 1750 front and rear service brake calipers...

Page 293: ...wear Replace brake pistons or complete brake caliper assembly if necessary 3 Check that pins on caliper bracket are not worn or damaged Wear on the pins will prevent smooth brake operation Assembly F...

Page 294: ...body Assembly Fig 9 1 If removed install cam lever into caliper body and then place pivot pins into lever holes Insert lever retain er spring with tangs bent away from housing until the spring tabs co...

Page 295: ...5 Hair pin 16 Lock nut 17 Cable tie Figure 10 FRONT RIGHT 11 12 13 14 15 16 17 1 2 3 4 4 5 6 7 8 9 10 When performing service work on the Multi Pro brake lines make sure to clean brake components befo...

Page 296: ...lat washer and clevis pin item 3 that secures the brake equalizer to the bellcrank 5 Remove retaining rings that secure brake cables to parking brake bracket 6 Remove cable ends from equalizer plate a...

Page 297: ...6 Position cables in parking brake bracket and install cable ends in brake equalizer 7 Secure parking brake cables to bracket with retain ing rings 8 Attach equalizer to parking brake lever with clev...

Page 298: ...nd passageways with com pressed air Make sure cylinder bore and component pieces are thoroughly clean NOTE Do not hone bore of brake cylinder 2 Check cylinder bore pistons and springs for damage or ex...

Page 299: ...al firmly depressed open bleeder valve of left rear brake until pedal fades to floor then close bleed er valve 4 Repeat procedure until a continuous flow of brake fluid with no air bubbles is released...

Page 300: ...etainer 6 Slotted hex nut 7 Tab washer 8 Wheel hub assembly 9 Lug stud 5 10 Brake rotor 11 Socket head screw 4 per rotor 12 Brake caliper 13 Front spindle LH shown 14 Lock washer 2 per caliper 15 Cap...

Page 301: ...om hub press new stud s fully into hub making sure that stud shoulder is tight against hub B If bearing cups were removed from the wheel hub press bearing cups into the hub until they seat against the...

Page 302: ...haft 12 Flange nut 13 Hub support 14 Drive stud Figure 16 8 2 13 1 FRONT RIGHT 3 7 170 to 180 ft lb 230 to 244 N m Staked 9 10 35 to 40 ft lb 48 to 54 N m 4 35 to 40 ft lb 48 to 54 N m Loctite 271 75...

Page 303: ...hreads of splined shaft item 11 and replace if necessary 6 Inspect wheel studs in hub and replace studs if dam aged Use a press to remove stud s from hub Installation Fig 16 1 If any wheel studs were...

Page 304: ...rol arm 13 Flange head screw 6 14 Cap screw 2 15 Flat washer 2 16 Shock absorber assembly 2 17 Tie rod 2 18 Jam nut 2 19 Tie rod end 2 20 Castle nut 2 21 Cotter pin 2 Figure 17 11 12 13 13 14 15 16 17...

Page 305: ...s and nuts C Install shock absorbers Tighten shock absorber mounting flange head screws and flange nuts from 40 to 50 ft lbs 54 to 68 N m D Install spindle assembly to the control arms Tighten cap scr...

Page 306: ...Use shock spring compressor TOR6015 see Spe cial Tools in this chapter to safely compress the spring While the spring is compressed remove the spring col lar and spring from the dampener cartridge Fig...

Page 307: ...Multi Pro 1750 Chassis Page 8 29 This page is intentionally blank Chassis...

Page 308: ...2 N m 20 to 25 ft lb 27 to 34 N m 1 Steering cylinder 2 Retaining ring 2 3 Steering pivot 4 Ball joint 2 5 Castle nut 2 6 Cotter pin 6 7 Tie rod end RH thread 2 8 Tie rod end LH thread 2 9 Jam nut RH...

Page 309: ...emove steering cylinder see Steering Cylinder in Chapter 4 Hydraulic System in this manu al 6 Disassemble steering components as needed Assembly Fig 20 1 Assemble steering components needed 2 Install...

Page 310: ...Thread the new rod end into the tie rod the same number of revolutions as the old one took to remove 2 Install grease fitting into tie rod end 3 Insert tie rod end shaft into spindle or steering pivot...

Page 311: ...RA SONIC BOOM SYSTEM OPERATION 6 Sprayer Operation on Level Turf 6 Downward Slope in Turf Encountered 8 Rise in Turf Encountered 10 Boom Level Changed by Operator During Automatic Operation 12 Manual...

Page 312: ...ic Controller TEC supplied with the kit The controller regulates hydraulic propor tional valves which control fluid flow to the boom hy draulic lift cylinders There is a 3 position switch on the Opera...

Page 313: ...hicle s engine and remove the key from the ignition switch 3 Disengage all power and wait until all moving parts have stopped 4 Remove chemicals from pump hoses and other spray components Thoroughly n...

Page 314: ...50 1400 RPM 27 HP 25 psi 100 MESH SCREEN 4 3 cid 1 625 BORE STEERING CYLINDER 1 00 ROD 4 69 STROKE 0 26 1 75 BORE 1 125 ROD 10 06 STROKE 1000 psi T P RETRACT TO RAISE ULTRA SONIC BOOM LIFT CONTROL MAN...

Page 315: ...Multi Pro 1750 Page 9 5 Ultra Sonic Boom Kit Optional Electrical Schematic Ultra Sonic Boom Kit Optional Electrical Schematic Ultra Sonic Boom Opt...

Page 316: ...Boom System Power Current Control Current Indicator Light Current Sprayer Operation on Level Turf Sonic Boom Switch in Automatic Position S3 TOP COIL S2 BOTTOM COIL S3 BOTTOM COIL S2 TOP COIL S4 S5 L...

Page 317: ...ll remain at a fixed height from the ground for spraying accuracy On level turf the boom sensors continually send signals and receive echoes that determine that the boom sec tions are at the calibrate...

Page 318: ...Control Current Indicator Light Current Downward Slope in Turf Encountered Left Boom Shown Sonic Boom Switch in Automatic Position S3 TOP COIL S2 BOTTOM COIL S3 BOTTOM COIL S2 TOP COIL S4 S5 LEFT SON...

Page 319: ...from the gear pump to the barrel end of the boom lift cylinder causing the cylinder to extend and the boom section to lower Once the boom section is lowered to the calibrated distance the elapsed tim...

Page 320: ...rrent Control Current Indicator Light Current Rise in Turf Encountered Right Boom Shown Sonic Boom Switch in Automatic Position S3 TOP COIL S2 BOTTOM COIL S3 BOTTOM COIL S2 TOP COIL S4 S5 LEFT SONIC S...

Page 321: ...ear pump to the rod end of the boom lift cylinder causing the cylinder to retract and the boom section to raise This maintains the boom height at the calibrated distance from the ground Once the boom...

Page 322: ...nt Indicator Light Current Boom Level Changed by Operator During Automatic Operation Raise Left Boom Shown Sonic Boom Switch in Automatic Position S3 TOP COIL S2 BOTTOM COIL S3 BOTTOM COIL S2 TOP COIL...

Page 323: ...erator keeps the boom lift switch pressed The sonic boom light will flash while the boom lift switch is being depressed If one boom is moved by the operator the other boom continues to function automa...

Page 324: ...rrent Control Current Indicator Light Current Manual Boom Operation Lower Right Boom Shown Sonic Boom Switch in Manual Position S3 TOP COIL S2 BOTTOM COIL S3 BOTTOM COIL S2 TOP COIL S4 S5 LEFT SONIC S...

Page 325: ...ift cylinder causing the cylinder to extend and the boom section to lower The boom will continue to lower until the operator re leases the boom actuator switch Raise Boom When a boom lift switch is pr...

Page 326: ...and a boom lift switch is pressed to manually change the boom height The flashing light will return to being constantly ON and automatic operation will be re engaged once the boom switch is manually p...

Page 327: ...ler TEC controller detects an electrical system malfunc tion fault during operation e g there is no signal com ing from a boom sensor the affected boom will raise briefly and then stop The sonic boom...

Page 328: ...m switch or circuit wiring is faulty One of the boom lift cylinders will not extend or retract Boom lift switch or circuit wiring for affected lift cylinder is faulty Boom lift control manifold soleno...

Page 329: ...is incorrectly installed Sonic boom sensor or circuit wiring for affected boom is faulty The Toro Electronic Controller TEC or circuit wiring is faulty Neither boom automatically follows ground irreg...

Page 330: ...Fuse A 10 Amp Protects power supply for TEC outputs diagnostic lamp sonic sensors and hydrau lic solenoid coil S5 Fuse B 10 Amp Protects power supply for TEC outputs sonic boom light and hydraulic sol...

Page 331: ...nated when the switch is in the man ual position Testing 1 Park vehicle on a level surface stop engine engage parking brake and remove key from ignition switch 2 Remove the lower control console panel...

Page 332: ...flash rapidly The diagnostic lamp will stop flashing and will automatically reset when the ignition switch is turned to the OFF position The fault however will be re tained in controller memory and ca...

Page 333: ...ilt into the sensors there is no method to test them directly The sensors may be damaged if an attempt is made to test them with an electrical test device e g digital multime ter or test light IMPORTA...

Page 334: ...h be illuminated or be off If the sensor programming plug is removed or is faulty the red LED will be illuminated The green LED will be off The yellow LED s may flash be illuminated or be off The stat...

Page 335: ...Multi Pro 1750 Page 9 25 Ultra Sonic Boom Kit Optional This page is intentionally blank Ultra Sonic Boom Opt...

Page 336: ...cal power for controller out puts is provided through three 3 connector terminals PWR 2 PWR 3 and PWR 4 each protected with a 10 amp fuse A fifty 50 pin wire harness connector at taches to the control...

Page 337: ...es are two 2 120 ohm termination resis tors Even though the network is not being used for the ultra sonic boom kit the termination resistors are re quired for proper electrical system operation The CA...

Page 338: ...re marked for easy identifica tion of components Example P is the pump supply con nection port and S2 is the location for solenoid valve S2 See Figure 25 to identify the function of the hydraulic line...

Page 339: ...TE The six 6 solenoid valve coils on the boom lift control manifold are identical To assist in troubleshoot ing identical coils can be exchanged If the problem fol lows the exchanged coil an electrica...

Page 340: ...Multi Pro 1750 Page 9 30 Ultra Sonic Boom Kit Optional This page is intentionally blank...

Page 341: ...IGNATIONS 2 ELECTRICAL SCHEMATICS 3 Machine Serial Number below 315000000 3 Machine Serial Number above 315000000 5 Ultrasonic Boom Kit Optional 7 WIRE HARNESS DRAWINGS AND DIAGRAMS 8 Machine Serial N...

Page 342: ...n alternate color These wires are identified with the wire color and line color with either a or _ separating the color abbreviations listed above e g R BK is a red wire with a black line OR_BK is an...

Page 343: ...solenoids are shown as de energized All ground wires are black NOTE WHEN A CONDUCTOR CONTINUES ONTO THE SPRAY SYSTEM SCHEMATIC SHOWN ON NEXT PAGE A REFERENCE NUMBER WILL BE IDENTIFIED machine serial n...

Page 344: ...EVIOUS PAGE A REFERENCE NUMBER WILL BE IDENTIFIED Electrical Schematic All relays and solenoids are shown as de energized All ground wires are black machine serial number below 315000000 page 2 of 2 M...

Page 345: ...solenoids are shown as de energized All ground wires are black machine serial number above 315000000 page 1 of 2 NOTE WHEN A CONDUCTOR CONTINUES ONTO THE SPRAY SYSTEM SCHEMATIC SHOWN ON NEXT PAGE A RE...

Page 346: ...All ground wires are black machine serial number above 315000000 page 2 of 2 Multi Pro 1750 NOTE WHEN A CONDUCTOR CONTINUES ONTO THE VEHICLE SCHEMATIC SHOWN ON PREVIOUS PAGE A REFERENCE NUMBER WILL BE...

Page 347: ...Page 10 7 Electrical Schematic Ultra Sonic Boom Kit Optional All relays and solenoids are shown as de energized All ground wires are black...

Page 348: ...Page 10 8 Multi Pro 1750 Main Wire Harness Drawing machine serial number below 315000000 121 6568 E...

Page 349: ...Page 10 9 Multi Pro 1750 Main Wire Harness Diagram machine serial number below 315000000 121 6568 E...

Page 350: ...Page 10 10 Multi Pro 1750 Main Wire Harness Drawing machine serial number above 315000000 122 0431 C...

Page 351: ...Page 10 11 122 0431 C Multi Pro 1750 Main Wire Harness Diagram machine serial number above 315000000...

Page 352: ...Page 10 12 Ultra Sonic Boom Kit Optional Wire Harness Drawing...

Page 353: ...ACK ORANGE BLACK BLACK BLACK BLACK BLACK RED TAN BLACK BLACK WHITE RED RED GREEN BLACK BLACK PINK YELLOW YELLOW BLACK BLACK VIOLET PINK YELLOW BLUE BLACK GRAY VIOLET PINK PINK VIOLET YELLOW BLACK GREE...

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Toro 41188, Service Manual

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