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Gravely 989003, Руководство по обслуживанию

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8.2  HYDRAULIC LIFT SYSTEM 
TROUBLESHOOTING

8.3  HYDRAULIC HOSES

NOTE: When loosening or tightening any hydraulic 
hoses, use the correct wrench. If hoses are to be dis-
connected or reconnected at a fitting use two 
wrenches, one on the hose and one on the fitting, to 
prevent damage by twisting off the fitting.

1. When disconnecting hoses, have an open top 

container to drain hydraulic oil into.

2. Clean all fittings and hoses where maintenance is 

to be performed, prior to removing hoses to avoid 
hydraulic system contamination. Cap hoses, 
fittings and hydraulic component ports.

3. Repair or replace any worn or damaged hydraulic 

items.

NOTE: Refer to the hydraulic diagram, Figure 54, for 
proper hydraulic hose routing.

4. Fittings which use an O-ring seal do not use a 

hydraulic sealer for preventing leaks. Fittings 
without an O-ring seal, should use a hydraulic 
sealer. Use caution not get hydraulic sealer into 
hydraulic system.

5. After any hydraulic hose maintenance, refer to 

Hydraulic System Servicing and  Hydraulic System 
Bleeding.

Problem

Probable Cause

 Corrective Action

Mower deck will not raise

Hydraulic system low on fluid

Pinched or restricted hydraulic hose

Air in system

Hydraulic valve or valve linkage

Transmission charge pressure too low

Add oil to hydraulic system

Repair or replace

Bleed hydraulic system

Repair or replace

Adjust

Mower deck bleeds down

Transmission charge pressure too low

Hydraulic valve

Hydraulic hose or fitting leak

Lift Cylinder

Adjust

Replace

Repair or replace

Repair or replace

Содержание 989003

Страница 1: ......

Страница 2: ...rbox Repair 6 36 6 18 PTO Gearbox Installation 6 36 Section 7 Steering Controls 7 37 7 1 Power Steering Schematic 7 37 7 2 Power Steering System Troubleshooting 7 37 7 3 Hydraulic Hoses 7 38 7 4 Steer...

Страница 3: ...ed 1 4 UNAUTHORIZED REPLACEMENT PARTS Use only Gravely replacement parts The replacement of any part on this vehicle with anything other than a s authorized replacement part may adversely affect the p...

Страница 4: ...e Organization is a key part of proper reassembly Tools instruments and parts needed for the job should be gathered before work is started Interrupting a job to locate tools or parts is a needless del...

Страница 5: ...lose traction turn off power take off and proceed slowly straight down slope Avoid wet surfaces Avoid parking on a slope If necessary use wheel chocks DO NOT leave unit unattended on a slope ALWAYS u...

Страница 6: ...fuel tank where any ignition sources are present Allow unit to cool completely ALWAYS clean unit before extended storage See Engine Manual for proper storage Spark Arrester This product is equipped wi...

Страница 7: ...PORTANT Never spray unit with water or store unit outdoors Clean seat regularly using a vinyl cleaner not solvent Extreme temperatures can damage seat when left unprotected against weather If seat sho...

Страница 8: ...with Precleaner Donaldson Type Dry Paper Element with Precleaner Engine Oil Type API Service CD 20W50 Motor Oil API Service CD 20W50 Motor Oil Oil Filter Integral Replaceable Integral Replaceable Coo...

Страница 9: ...Type API Service CD 20W50 Motor OIl API Service CD 20W50 Motor OIl Oil Filter Integral Replaceable Integral Replaceable Cooling Liquid Liquid Charging Capacity Automotive 40 Amp Alternator Automotive...

Страница 10: ...n Type Dry Paper Engine Oil Type API Service CD API Service CD Charging Capacity Automotive 40 Amp Alternator Automotive 40 Amp Alternator Transmission Oil and Capacity qts L API Service CC 10W30 or 3...

Страница 11: ...y 6 Temperature Gauge 7 Battery Warning Light 8 Throttle Control Lever 9 Oil Pressure Warning Light 10 Light Switch Optional 11 Cruise Control Switch optional 12 Hourmeter 13 Park Brake Lock Lever 14...

Страница 12: ...sually observing the level in the vinyl hose which is fastened to the front of the gearbox cover The lubricant level is correct when it is approximately even with the center of the PTO output lower sh...

Страница 13: ...f rear wheels is necessary to assure proper steering and to reduce tire wear Proper toe in is when the front of the wheels are 1 16 to 1 8 closer together than the rear of wheels measured at horizonta...

Страница 14: ...ator Turn rod end counterclockwise to move pedal angle toward operator and clockwise to move pedal angle away from operator 3 Replace hardware holding rod end to direction control weldment 4 Adjust co...

Страница 15: ...lever arm to brake cam 2 Remove cam lever arm from brake cam Rotate cam lever arm one spine to the rear and put it back on brake cam 3 Tighten nut and bolt 4 Repeat above steps if necessary 4 8 PTO CL...

Страница 16: ...VERTICAL FOR NORMAL OPERATION 10 DEGREES BEFORE VERTICAL FOR ETREME OPERA TION Figure 10 OF0840 Figure 11 1 Clutch Pac 2 Bar Spring 3 Clutch Trunnion 4 Bushing 5 Jam Nut 6 PTO Slide Rod OF0830 1 2 3 4...

Страница 17: ...ct grade of fuel 43 Faulty suction pipe 2 Bad electrical connection 23 Sticking throttle restricted movement 44 Choked oil filter 3 Faulty starter motor 24 Exhaust pipe restriction 45 Bad solenoid swi...

Страница 18: ...e is warm stop it and raise the hood 3 Clean the areas around the dipstick and drain plug 4 Put an open top container that will hold five quarts under the drain plug 5 Remove the drain plug 6 Allow th...

Страница 19: ...hose at the radiator NOTE Mark one of the two fuel hoses to ensure proper reinstallation 5 Close the fuel shut off valve at the fuel filter Clean the fuel hoses and fittings Disconnect the fuel hoses...

Страница 20: ...d tighten 3 Install the flywheel adapter plate apply loctite to bolts and tighten Lubricate the transmission drive shaft 4 Refer to the appropriate wiring diagram in Electrical section to ensure corre...

Страница 21: ...6 21 6 1 HYDRAULIC SCHEMATIC SECTION 6 DRIVE TRAIN Figure 16...

Страница 22: ...level surface 2 Place a container under filter to catch oil spillage as filter is removed 3 Use an oil filter removal tool to unscrew filter Discard old filter 4 Fill new oil filter with fresh clean...

Страница 23: ...nes and install U joint attach U joint to transmission with the two mounting bolts 3 PTO drive shaft removal a To remove PTO drive shaft remove the four bolts connecting the drive shaft to the transmi...

Страница 24: ...r shim as opposed to two or more thin shims 4 Once the correct pressure has been established shut down the unit and remove the pressure gauge and install the pipe plug 6 8 SUNSTRAND TRANSMISSION REMOV...

Страница 25: ...rom the transmission 2 Note the orientation of the charge pump housing to adjacent housing and mark to insure proper relocation 3 Clean the shaft extension to remove sharp edges burrs and abrasive res...

Страница 26: ...TRANSMISSION MAJOR REPAIR NOTE Prior to major disassembly the charge pump must be removed 1 Place the transmission with the shafts in a vertical position Remove the cap screws from the center section...

Страница 27: ...large cavity of the housing Figure 29 11 The motor shaft bearing is removed by pressing out toward the front of the housing Replace the bearing if necessary 12 Visually inspect the needle bearings an...

Страница 28: ...ousing until flush to 1 64 below counterbore for lip seals 25 Install new pins through the swashplate and shafts Use two pins on the control shaft installing the first pin until the second pin can be...

Страница 29: ...the pump motor and control shafts while tightening these screws 40 Install charge pump 6 11 SUNSTRAND TRANSMISSION INSTALLATION 1 Place a new O ring seal on the transmission Use a film of grease to h...

Страница 30: ...ect fork flanges should be toward each other On 3 gear cluster small gear and medium gear chamfers go down toward big gear Improper fit of case to cover Recheck positioning of thrust washers A misplac...

Страница 31: ...lled or not tightened Seal retainers are not properly sealed Tighten axle housing bolts Burrs on gears Remove gear and hone smooth Parts missing Install missing parts Broken shifter stop allowing unit...

Страница 32: ...re 38 6 14 TRANSAXLE REPAIR Axle Bearing Replacement NOTE The axle bearings can be inspected and replaced without removing the transaxle from unit 1 Place a drain pan under the transaxle and remove th...

Страница 33: ...stall the lift arm weldment 11 Install the wheel assembly and tighten the lug bolts to spec 12 Lower the unit and service with clean fresh oil 13 Prime the transmission Transaxle Repair Center Section...

Страница 34: ...the shifter fork on both shifter forks 3 Inspect the shifter fork for straightness and wear e Differential 1 Check security of the parts 2 Check shifter collar for wear two speed 3 Check the ball bear...

Страница 35: ...rods at the transaxle 9 Install the transmission Connect the hydraulic reservoir supply hose 10 Service the transmission and transaxle with clean fresh oil 6 16 PTO GEARBOX REMOVAL NOTE Position the...

Страница 36: ...replace any worn or damaged parts 11 Inspect the two case halves and replace the oil seals prior to reassembling the PTO gearbox 12 Assemble the PTO gearbox reversing the disassembly procedure watchi...

Страница 37: ...ng Arm Weldment 1 2 3 4 5 6 3 3 4 4 7 PF1144 Problem Probable Cause Corrective Action Rear wheels will not turn Hydraulic system low on fluid Air in system Pinched or restricted hydraulic hose Service...

Страница 38: ...rect wrench If hoses are to be dis connected or reconnected at a fitting use two wrenches one on the hose and one on the fitting to prevent damage by twisting off the fitting Figure 51 1 Power Steerin...

Страница 39: ...parts 7 5 STEERING BOX INSTALLATION 1 Slide the power steering unit into place and secure with the four nuts Install the nylon bushing if removed 2 Connect the five hydraulic hoses to the power steeri...

Страница 40: ...T SYSTEM PRESSURE RETURN SUCTION IN OUT AUX LT RT TRANSAXLE STEERING CYLINDER TRANSMISSION LIFT CYLINDER HYDRULIC VALVE POWER STEERING UNIT IN EXHAUST OUT PORT A PORT C PORT E PORT D PORT B PORT F POR...

Страница 41: ...ic diagram Figure 54 for proper hydraulic hose routing 4 Fittings which use an O ring seal do not use a hydraulic sealer for preventing leaks Fittings without an O ring seal should use a hydraulic sea...

Страница 42: ...ds for signs of wear Repair or replace any worn or damaged parts 8 5 HYDRAULIC LIFT VALVE INSTALLATION 1 Install the hydraulic valve with the four mounting bolts 2 Connect the three hydraulic hoses to...

Страница 43: ...e to increase the hydraulic pressure or counterclockwise to decrease the hydraulic pressure 5 Shutdown the unit once the recommended pressure is consistently maintained Hold the adjusting screw and ti...

Страница 44: ...assembly and fuel filter assembly 2 Clamp off the fuel lines at the feed pump and fuel filter assembly and loosen the fuel line clamps 3 Remove the fuel line at the feed pump fitting and pull the hose...

Страница 45: ...invested in time of repair than the part would cost and the results may not be as good 10 2 ELECTRICAL MEASUREMENTS In many electrical circuits there is some visible effect which indicates that the c...

Страница 46: ...new battery is dry charged Electrolyte must be added sulfuric acid and water 1 Remove the battery from the unit 2 Remove all the vent caps from the battery and set the caps to one side 3 Take the ele...

Страница 47: ...ttery in a cool dry area during the off season This will slow down the loss of charge during non use periods 6 Check your battery monthly during the off season and if the battery has a low specific gr...

Страница 48: ...lector and clutch levers may be out of adjustment and not activating IMPORTANT When checking switches remove them from their respective circuit by disconnecting the wires from the switch at the connec...

Страница 49: ...is intact the solenoid plunger is stuck or the contacts are welded shut and the solenoid must be replaced If the solenoid snaps shut but the start does not operate check across the large contacts wit...

Страница 50: ...one lead to the B pin 3 Turn the ignition key to the off position Sequentially touch pins R I A S and the case with the free meter lead No circuit infinity should be indicated 4 Turn the key to the St...

Страница 51: ...A circuit zero Ohms should be indicated 4 Replace the switch if it fails the above test Fuel Shut Off Solenoid 1 If engine fails to start verify with the key switch in the start position that power 12...

Страница 52: ...GIZED ST B I 50 ST B I 50 ST B I 50 GLOW PLUG COUNTERCLOCKWISE OFF ON 1 OPERATOR OFF SEAT 2 1 OPERATOR ON SEAT 2 Light Switch Optional 03656800 BLACK WHITE FUEL SOLENIOD 1 2 3 RED BLACK GRAY YELLOW RE...

Страница 53: ...10 53 10 11 WIRING DIAGRAMS Promaster 400 30 H...

Страница 54: ...10 54 Promaster 400 22 H...

Страница 55: ...HITE ORANGE YELLOW BLACK OIL PRESSURE LIGHT ALTERNATOR BATTERY SOLENIOD STARTER FUEL SOLENIOD GLOW PLUG ENGINE KEY SWITCH GLOW PLUG RELAY HOUR METER HEAD LIGHT LIGHT SWITCH CRUISE CONTROL CAB POWER SU...

Страница 56: ...ULIC SCHEMATIC NOTE This hydraulic schematic is from a belly mount frame brace manifold For an axle mount manifold the manifold would be inverted and the single solenoid would face to the right side S...

Страница 57: ...ic oil into 2 Clean all fittings and hoses where maintenance is to be performed prior to removing hoses to avoid hydraulic system contamination Cap hoses fittings and hydraulic component ports 3 Repai...

Страница 58: ...b loose on the axle Remove the castle nut the rest of the way and slide the hub off of the axle 3 Disconnect the two hydraulic hoses at the wheel motor and cap 4 Remove the two hydraulic adapters from...

Страница 59: ...of Cut 60 152 4 cm 72 182 9 cm 72 182 9 cm Height of Cut 1 5 4 5 3 81 11 43 cm Deck Construction 10 gauge welded and bolted construction w 3 16 4 8 mm thick reinforcing support plate Blades Number 3...

Страница 60: ...ly Sten Mix Hi Temp Grease or equivalent to the lube fittings Order P N 000368 Three Pack of 3 oz cartridges or P N 00036700 10 pack of 14 oz tubes If using Sten Mix Hi Temp Grease for the first time...

Страница 61: ...elt Figure 59 5 Reinstall the tension spring 6 Replace belt covers and any other parts Blade Service Every 25 hours or operation or when the cut is visually poor check the blades for sharpness To shar...

Страница 62: ...to press or seat bearing races This will cause damage to the spindle bearing 6 Press bearing races into spindle housing tapered under cut towards center of spindle housing Inspect that the races are s...

Страница 63: ...12 63 Figure 60 60 Gauge Wheels Roller and Height Adjustments Figure 61 72 Gauge Wheels Roller and Height Adjustments PF3250...

Страница 64: ...12 64 Figure 62 Mower Mounting PF3170 Figure 63 Mower Gearbox...

Страница 65: ...12 65 Figure 64 Mower Drive PF3190...

Страница 66: ...Gravely A division of Ariens Company 655 West Ryan Street P O Box 157 Brillion WI 54110 0157 920 756 2141 Fax 920 756 2407 www gravely com...

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