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Toro 38870, Service Manual

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Toro 38870 Service Manual Download Page 12

Specifications

POWER TRX™ HD Snowthrower

Model Name

Power TRX™

Commercial 1428

Power TRX™

Commercial 1432

Power TRX™

Commercial 1428

Power TRX™

Commercial 1432

Model

38890

38891

38870

38875

Clearing Width

71 cm (28 inch)

81 cm (32 inch)

71 cm (28 inch)

81 cm (32 inch)

Snow Cut Depth

51 cm (20 inch)

Engine

420cc Toro Premium OHV

Engine Model

LC190FDS

LC190FDS-1

Oil Type &
Capacity

0.95 L (32 oz) 10w 30 / 5w 30 Synthetic

High Idle RPM

3300 ± 100

Ignition Coil Air
Gap

0.3-0.5 mm (0.011-0.019 inch)

Spark Plug

NGK BPR6ES

Spark Plug Gap

0.7-0.8 mm (0.028-0.032 inch)

Fuel Capacity

4.5 L (1.2 gal)

Starting

Recoil/Electric

Throwing
Distance

Up to 18.3 m (60 feet)

Drive System

Hydrostatic

Scraper

Fixed

Weight

138 kg (304 lb)

141 kg (311 lb)

138 kg (304 lb)

141 kg (311 lb)

Length

160 cm (63 inch)

Width

74 cm (29 inch)

84 cm (33 inch)

74 cm (29 inch)

84 cm (33 inch)

Height

114 cm (45 inch)

Specifications and Maintenance: Specifications

Page 2–2

POWER TRX™ HD Service Manual

3440-740 Rev A

 

Summary of Contents for 38870

Page 1: ... 3440 740 Rev A POWER TRX HD Service Manual Published November 2020 2020 The Toro Company 8111 Lyndale Avenue South Bloomington MN 55420 Original Instructions EN Contact us at www Toro com All Rights Reserved ...

Page 2: ...Revision History Revision History Page 2 POWER TRX HD Service Manual 3440 740 Rev A ...

Page 3: ...e related topics covered in this manual We are hopeful that you will find this manual a valuable addition to your service shop If you have any questions or comments regarding this manual please contact us at the following address The Toro Company RLC SWS Customer Care Department 8111 Lyndale Avenue South Bloomington MN 55420 The Toro Company reserves the right to change product specifications or m...

Page 4: ...ner tightening sequence Component orientation that may not be obvious Critical Torque This icon is used to highlight an assembly torque requirement that is different than what is recommended in the Standard Torque Tables Fluid Specifications This icon is used to highlight fluid specifications and capacities that are less common and may not appear on the machine service decal or in the machine Oper...

Page 5: ...epairs 5 3 Chapter 6 Controls 6 1 General Information 6 2 Service and Repairs 6 3 Chapter 7 Belts 7 1 General Information 7 2 Service and Repairs 7 3 Chapter 8 Auger Housing 8 1 General Information 8 2 Service and Repairs 8 3 Chapter 9 Auger Gearbox 9 1 General Information 9 2 Service and Repairs 9 3 Chapter 10 Discharge Chute 10 1 General Information 10 2 Service and Repairs 10 3 Appendix A A 1 E...

Page 6: ...Preface Page 6 POWER TRX HD Service Manual 3440 740 Rev A ...

Page 7: ...Chapter 1 Safety Table of Contents Safety Instructions 1 2 Think Safety First 1 2 POWER TRX HD Service Manual Page 1 1 Safety 3440 740 Rev A ...

Page 8: ...mally moving parts as if they were moving whenever the engine is running or has the potential to start Avoid burns Do not touch the engine muffler or other components which may be hot during operation while the unit is running or shortly after it has been running Avoid fires and explosions Use extreme care in handling fuel It is flammable and its vapors are explosive Extinguish all cigarettes ciga...

Page 9: ...way from pin hole leaks or nozzles that eject hydraulic fluid under high pressure Do not use your hands to search for leaks Hydraulic fluid escaping under pressure can have sufficient force to penetrate under the skin and cause serious injury Seek medical attention right away if hydraulic fluid gets in the skin Personal Protective Equipment Tie back long hair and do not wear loose clothing or jewe...

Page 10: ...the approximate number of square feet of fire it can extinguish Geometric symbol red square Class C fires involve electrical equipment such as appliances wiring circuit breakers and outlets Never use water to extinguish class C fires the risk of electrical shock is far too great Class C extinguishers do not have a numerical rating The C classification means the extinguishing agent is non conductiv...

Page 11: ...s and Maintenance Table of Contents Specifications 2 2 Torque Specifications 2 3 Equivalents and Conversions 2 8 U S to Metric Conversions 2 9 POWER TRX HD Service Manual Page 2 1 Specifications and Maintenance 3440 740 Rev A ...

Page 12: ...95 L 32 oz 10w 30 5w 30 Synthetic High Idle RPM 3300 100 Ignition Coil Air Gap 0 3 0 5 mm 0 011 0 019 inch Spark Plug NGK BPR6ES Spark Plug Gap 0 7 0 8 mm 0 028 0 032 inch Fuel Capacity 4 5 L 1 2 gal Starting Recoil Electric Throwing Distance Up to 18 3 m 60 feet Drive System Hydrostatic Scraper Fixed Weight 138 kg 304 lb 141 kg 311 lb 138 kg 304 lb 141 kg 311 lb Length 160 cm 63 inch Width 74 cm ...

Page 13: ... of the fastener s head or similar condition which affects the installation As noted in the following tables torque values should be reduced by 25 for lubricated fasteners to achieve the similar stress as a dry fastener Torque values may also have to be reduced when the fastener is threaded into aluminum or brass The specific torque value should be determined based on the aluminum or brass materia...

Page 14: ...Metric Bolts and Screws g272209 Figure 2 1 Class 8 8 2 Class 10 9 Specifications and Maintenance Torque Specifications Page 2 4 POWER TRX HD Service Manual 3440 740 Rev A ...

Page 15: ... 68 7 70 7 95 9 7 16 20 UNF 29 3 29 3 39 4 55 6 75 8 77 8 104 11 1 2 13 UNC 30 3 48 7 65 9 75 8 102 11 105 11 142 15 1 2 20 UNF 32 4 53 7 72 9 85 9 115 12 120 12 163 16 5 8 11 UNC 65 10 88 12 119 16 150 15 203 20 210 21 285 28 5 8 18 UNF 75 10 95 15 129 20 170 18 230 24 240 24 325 33 3 4 10 UNC 93 12 140 20 190 27 265 27 359 37 375 38 508 52 3 4 16 UNF 115 15 165 25 224 34 300 30 407 41 420 43 569...

Page 16: ...e torque values listed in the table above by 25 for lubricated fasteners Lubricated fasteners are defined as threads coated with a lubricant such as oil graphite or thread sealant such as Loctite Torque values may have to be reduced when installing fasteners into threaded aluminum or brass The specific torque value should be determined based on the fastener size the aluminum or base material stren...

Page 17: ...No 10 24 UNC 38 7 in lb 1 4 20 UNC 85 15 in lb 5 16 18 UNC 110 20 in lb 3 8 16 UNC 200 100 in lb Hole size material strength material thickness and finish must be considered when determining specific torque values All torque values are based on non lubricated fasteners Conversion Factors in lb X 11 2985 N cm ft lb X 1 3558 N m N cm X 0 08851 in lb N cm X 0 73776 ft lb Thread Cutting Screws Zinc Pl...

Page 18: ...47 64 0 734375 18 653 1 4 0 2500 6 350 3 4 0 7500 19 050 17 64 0 265625 6 747 49 64 0 765625 19 447 9 32 0 28125 7 144 25 32 0 78125 19 844 19 64 0 296875 7 541 51 64 0 796875 20 241 5 16 0 3125 7 541 13 16 0 8125 20 638 21 64 0 328125 8 334 53 64 0 828125 21 034 11 32 0 34375 8 731 27 32 0 84375 21 431 23 64 0 359375 9 128 55 64 0 859375 21 828 3 8 0 3750 9 525 7 8 0 8750 22 225 25 64 0 390625 9 ...

Page 19: ... Cubic Feet Cubic Meters 0 02832 Volume Cubic Inches Cubic Centimeters 16 39 Tons Short Metric Tons 0 9078 Pounds Kilograms 0 4536 Weight Ounces Grams 28 3495 Pressure Pounds Square Inch Kilopascal 6 895 Foot Pounds Newton Meters 1 356 Foot Pounds Kilogram Meters 0 1383 Work Inch Pounds Kilogram Centimeters 1 152144 Quarts Liters 0 9463 Liquid Volume Gallons Liters 3 785 Liquid Flows Gallons Minut...

Page 20: ...Specifications and Maintenance Torque Specifications Page 2 10 POWER TRX HD Service Manual 3440 740 Rev A ...

Page 21: ...Chapter 3 Troubleshooting Table of Contents General Troubleshooting 3 3 POWER TRX HD Service Manual Page 3 1 Troubleshooting 3440 740 Rev A ...

Page 22: ... E Narrow down the focus of the problem Assess Performance Ensure you have all the necessary tools for testing Test all potential causes of the failure A Reevaluate and create new hypotheses if necessary Repair R Return the unit to service by repairing rebuilding or replacing Solution Confirmation Did the issue go away Was the root cause of the issue correctly repaired S Are there any other new sy...

Page 23: ...General Troubleshooting See Operator s Manual for troubleshooting information POWER TRX HD Service Manual Page 3 3 Troubleshooting General Troubleshooting 3440 740 Rev A ...

Page 24: ...Troubleshooting General Troubleshooting Page 3 4 POWER TRX HD Service Manual 3440 740 Rev A ...

Page 25: ...Chapter 4 Engine Table of Contents General Information 4 2 Service and Repairs 4 3 Engine Replacement 4 4 POWER TRX HD Service Manual Page 4 1 Engine 3440 740 Rev A ...

Page 26: ...Models 38890 and 38891 use Toro Engine LC190FDS and have 120v starters Models 38870 and 38875 use Toro Engine LC190FDS 1 and have 230v starters Engine General Information Page 4 2 POWER TRX HD Service Manual 3440 740 Rev A ...

Page 27: ...epairs Engine Assembly g332805 Figure 3 1 Engine 4 Belt Guide 2 LED Light Assembly 5 Engine Plate Assembly 3 Light Bracket 6 Belt Cover POWER TRX HD Service Manual Page 4 3 Engine Service and Repairs 3440 740 Rev A ...

Page 28: ...securing the LH engine to the LH engine plate Repeat on the RH side of the machine g263346 Figure 4 5 Using a proper lifting device lift the engine away from the machine Engine Installation 1 Using a proper lifting device place the engine into position on the machine 2 Apply loctite and install the 2 15 mm nuts securing the LH engine to the LH engine plate Torque the nuts to 12 25 1 7 N m 150 15 i...

Page 29: ...ure with 2 1 4 20 x 1 inch bolts CAUTION When installing the traction belt make sure the belt is riding on top of the traction pulley sheaves to ensure the belt does not break 4 Install the traction belt Traction Belt Installation page 7 8 POWER TRX HD Service Manual Page 4 5 Engine Service and Repairs 3440 740 Rev A ...

Page 30: ...Engine Service and Repairs Page 4 6 POWER TRX HD Service Manual 3440 740 Rev A ...

Page 31: ...ter 5 Track Drive System Table of Contents General Information 5 2 Service and Repairs 5 3 Track Replacement 5 5 Hydro Replacement 5 6 POWER TRX HD Service Manual Page 5 1 Track Drive System 3440 740 Rev A ...

Page 32: ...General Information The track drive system uses bypasses in the hydro to make the wheel clutch system work Track Drive System General Information Page 5 2 POWER TRX HD Service Manual 3440 740 Rev A ...

Page 33: ...e Wheel Assembly 4 Link Pivot Assembly 14 Snow Track 5 Flange Bushing 15 Support Tube 6 Welded Tensioner 16 Front Brace 7 Pivot Bar 17 Axle Bushing 8 Axle Bushing Support 18 Bogey Wheel 9 Wheel Bushing 19 Drive Hub Assembly 10 LH Track Support Assembly 20 Track Skid Assembly POWER TRX HD Service Manual Page 5 3 Track Drive System Service and Repairs 3440 740 Rev A ...

Page 34: ...Hydro Assembly g332808 Figure 7 1 Upper Hydro Bracket 3 Rear Hydro Bracket 2 Cable Hydro Bracket 4 Hydro Track Drive System Service and Repairs Page 5 4 POWER TRX HD Service Manual 3440 740 Rev A ...

Page 35: ...olt securing the LH tension plate to the tension lug until the track is loose Repeat on the RH side of the machine g332810 Figure 9 5 Remove the track by first slipping it off the drive wheel and then the bogey wheels Track Installation 1 Install the new track by sliding the bottom of the track on the two bogey wheels then over the drive wheel 2 Tighten the 9 16 inch rear hex head bolt securing th...

Page 36: ... 35 ft lb Repeat on the RH side of the machine g332809 Figure 11 Hydro Replacement Hydro Removal 1 Park the machine on a level surface Stop the engine wait for all moving parts to stop and remove the key CAUTION Do not flip the snowthrower on the auger housing Damage to the hydrostat may occur 2 Using a overhead lifting device raise the unit off the floor Track Drive System Service and Repairs Pag...

Page 37: ...le lever Repeat on the RH side of the machine g332812 Figure 13 6 Remove the 1 4 20 x 5 8 inch screw securing the traction cable to the underside of the control panel Remove the traction cable 7 Remove the 4 1 4 20 x 5 8 inch bolts securing the rear cover to the traction frame and bottom cover Remove the rear cover 8 Unclip the clutch cables from the rear cover POWER TRX HD Service Manual Page 5 7...

Page 38: ...dro Note The clutch cable springs may have cable ties securing the springs to the hydro clutch arms g332815 Figure 15 10 Remove the 2 1 4 20 x 5 8 bolts securing they rear hydro bracket to the frame Track Drive System Service and Repairs Page 5 8 POWER TRX HD Service Manual 3440 740 Rev A ...

Page 39: ...t securing the rear hydro bracket to the hydro Remove the rear hydro bracket g335295 Figure 17 12 Remove the 3 8 inch screw securing the hydro to the upper hydro bracket POWER TRX HD Service Manual Page 5 9 Track Drive System Service and Repairs 3440 740 Rev A ...

Page 40: ...bottom cover to the traction frame Remove the bottom cover 14 Place a floor jack under the hydro and lower frame brace to support the hydro g332817 Figure 19 15 Remove the hydro belt from the hydro Track Drive System Service and Repairs Page 5 10 POWER TRX HD Service Manual 3440 740 Rev A ...

Page 41: ...rame brace to the LH traction frame Repeat on the RH side of the machine g332816 Figure 21 17 Remove the 2 1 4 20 x 2 1 4 inch screws and 2 5 16 18 x 3 4 inch nuts securing the LH hydro to the LH traction frame Repeat on the RH side of the machine POWER TRX HD Service Manual Page 5 11 Track Drive System Service and Repairs 3440 740 Rev A ...

Page 42: ...l the 2 1 4 20 x 2 1 4 inch screws and 2 5 16 18 x 3 4 inch nuts securing the LH lower frame brace to the LH traction frame Repeat on the RH side of the machine g332816 Figure 23 3 Install the 2 1 4 20 x 2 1 4 inch screws and 2 5 16 18 x 3 4 inch nuts securing the LH hydro to the LH traction frame Repeat on the RH side of the machine Track Drive System Service and Repairs Page 5 12 POWER TRX HD Se...

Page 43: ...32819 Figure 25 5 Remove the floor jack from under the hydro 6 Install the bottom cover and secure with 4 3 8 inch screws 7 Install the 3 8 inch screw securing the hydro to the upper hydro bracket POWER TRX HD Service Manual Page 5 13 Track Drive System Service and Repairs 3440 740 Rev A ...

Page 44: ...dro bracket to he frame and secure with 2 1 4 20 x 5 8 bolts Torque the 2 bolts to 6 N m 50 in lb g335296 Figure 27 9 Install the nut securing the rear hydro bracket to the hydro Track Drive System Service and Repairs Page 5 14 POWER TRX HD Service Manual 3440 740 Rev A ...

Page 45: ...ued g335295 Figure 28 10 Install the clutch cable springs to the hydro g332815 Figure 29 11 Clip the clutch cables into the rear cover POWER TRX HD Service Manual Page 5 15 Track Drive System Service and Repairs 3440 740 Rev A ...

Page 46: ... 6 N m 50 in lb Note Once the speed control cable has been removed it may need to be re set to gain neutral position of the hydro by adjusting the jam nuts 14 Install the LH clutch cable to the LH clutch lever Repeat on the RH side of the machine g332812 Figure 31 15 Install the 3 1 4 20 x 5 8 inch screws securing the height adjuster assembly and pivot bar to the frame Track Drive System Service a...

Page 47: ...gure 32 16 Install the tracks onto the machine Track Installation page 5 5 17 Lower the machine to the ground and remove the overhead lifting device POWER TRX HD Service Manual Page 5 17 Track Drive System Service and Repairs 3440 740 Rev A ...

Page 48: ...Track Drive System Service and Repairs Page 5 18 POWER TRX HD Service Manual 3440 740 Rev A ...

Page 49: ...General Information 6 2 Service and Repairs 6 3 QUICK STICK Replacement 6 5 Control Interlock Replacement 6 10 Control Replacement and Adjustment 6 12 Shift Lever Adjustment 6 14 POWER TRX HD Service Manual Page 6 1 Controls 3440 740 Rev A ...

Page 50: ...tion The POWER TRX models 38890 38891 38870 and 38875 are all commercial units and are built with commercial grade handles and controls Controls General Information Page 6 2 POWER TRX HD Service Manual 3440 740 Rev A ...

Page 51: ...3 1 RH QUICK STICK Globe 6 Chute Control Lever Assembly 2 Chute Rod 7 LH QUICK STICK Globe 3 Lever Cap 8 Chute Control Rod 4 Latch Trigger 9 Deflector Control Cable 5 Latch Link POWER TRX HD Service Manual Page 6 3 Controls Service and Repairs 3440 740 Rev A ...

Page 52: ...n Cable 2 Lever Bracket 8 Push Pull Hydro Cable 3 Speed Shift Gate 9 HD Handle Assembly 4 Metal Trim 10 Cleanout Stick Bracket 5 Light Clamp 11 Clutch Cable 6 Speed Cable Bracket 12 Lower Handle Bracket Controls Service and Repairs Page 6 4 POWER TRX HD Service Manual 3440 740 Rev A ...

Page 53: ...he deflector cable from the underside of the QUICK STICK g262301 Figure 35 3 On the underside of the control panel remove the 2 1 4 10 x 0 82 inch screws holding the QUICK STICK cover in place g262302 Figure 36 4 Lift the front cover and pull forward to release the latch tabs on the rear Set the cover aside POWER TRX HD Service Manual Page 6 5 Controls Service and Repairs 3440 740 Rev A ...

Page 54: ...QUICK STICK out of the control panel Note Notice the location of the cable clamp for latch cable function 6 Remove the top cover 7 Disconnect the chute cable g262304 Figure 38 QUICK STICK Disassembly 1 Remove the Phillips head screw retaining the blue lever cap Controls Service and Repairs Page 6 6 POWER TRX HD Service Manual 3440 740 Rev A ...

Page 55: ...d set aside g262306 Figure 40 3 Remove the 9 16 inch locknut from the shoulder bolt Slide the chute control rod off and remove the friction washer 4 Hold the QUICK STICK so that the 5 screws holding the handle halves are facing up Remove the 5 Phillips head screws and lift off the top handle half POWER TRX HD Service Manual Page 6 7 Controls Service and Repairs 3440 740 Rev A ...

Page 56: ... on the cable lever Remove the latch trigger and spring Note Notice the orientation of the pawl to the lever for reassembly g262319 Figure 42 6 Rotate the cable until the barrel fitting slides off the cable lever Controls Service and Repairs Page 6 8 POWER TRX HD Service Manual 3440 740 Rev A ...

Page 57: ...e of the trigger lever 3 Rotate the cable until the barrel fitting slides onto the cable lever 4 Install the latch trigger and spring Lift the metal latch pawl onto the cable lever hex 5 Install the top handle into position secure with 5 Phillips head screws 6 Install the 1 3 4 inch friction washer Slide the chute control rod into place Secure with a 9 16 inch locknut onto the shoulder bolt 7 Inst...

Page 58: ...underside of the control panel 4 Hook the Z bend and connect the deflector cable from the underside Control Interlock Replacement Control Interlock Removal 1 Park the machine on a level surface Stop the engine wait for all moving parts to stop and remove the key 2 Disconnect the auger and traction cables from the levers If this is a wheel clutch model disconnect the wheel clutch cables g263048 Fig...

Page 59: ...Figure 47 5 Once the roll pins are driven out the lockout rod can be moved to the side and removed The lockout link can now be removed from the lockout rod 6 Remove the levers Note Steps 1 and 2 above do not need to be done in that order It s possible to remove the rod without removing the shoulder bolt POWER TRX HD Service Manual Page 6 11 Controls Service and Repairs 3440 740 Rev A ...

Page 60: ...4 Install the 2 roll pins on the LH side and the pin in the lockout cam on the RH side 5 Install the lockout latch extension spring flat washer and locknut Install the shoulder screw under the RH handgrip 6 If this is a wheel clutch model connect the wheel clutch cables Connect the auger and traction cables to the levers Control Replacement and Adjustment Deflector Cable Removal 1 Park the machine...

Page 61: ...cable clamp on the traction housing Deflector Cable Installation 1 Connect the cable end to the deflector Secure with a cable clamp 2 Connect the Z bend end to the machine 3 Install the cable onto the bracket Secure with tabs 4 Connect the cable clamp to the traction housing POWER TRX HD Service Manual Page 6 13 Controls Service and Repairs 3440 740 Rev A ...

Page 62: ...1 Shift Lever Adjustment The shift lever on the control panel is connected to the friction wheel in the traction frame by a shift rod Moving the shift lever changes the friction wheel location g263052 Figure 52 Shift Rod Adjustment 1 Park the machine on a level surface Stop the engine wait for all moving parts to stop and remove the key Controls Service and Repairs Page 6 14 POWER TRX HD Service M...

Page 63: ...2 adjust the trunnion to take the slack out and re secure Note Excessive slack in the linkage may cause the drive to be in reverse when shifted into first gear g263054 Figure 54 Auger Control The bail on the RH handle is the auger control Squeeze the bail and the cable causes an idler to pivot the tensioning in the auger belt POWER TRX HD Service Manual Page 6 15 Controls Service and Repairs 3440 ...

Page 64: ...Controls Service and Repairs Page 6 16 POWER TRX HD Service Manual 3440 740 Rev A ...

Page 65: ...Chapter 7 Belts Table of Contents General Information 7 2 Service and Repairs 7 3 Auger Belt Replacement 7 4 Traction Belt Replacement 7 7 POWER TRX HD Service Manual Page 7 1 Belts 3440 740 Rev A ...

Page 66: ...General Information The POWER TRX units use a double V auger drive belt Belts General Information Page 7 2 POWER TRX HD Service Manual 3440 740 Rev A ...

Page 67: ... 1 Traction Belt 7 Traction Idler Arm 2 Cable Bracket 8 Square Key 3 Traction Sheave 9 Idler Pulley 4 Cable Guide Cap 10 Cable Anchor 5 Extension Spring 11 Traction Cable 6 Cable Guide POWER TRX HD Service Manual Page 7 3 Belts Service and Repairs 3440 740 Rev A ...

Page 68: ...r 3 Disconnect the light from the cover g335258 Figure 56 4 Remove the 2 1 4 20 x 5 8 inch screws securing the belt cover to the traction frame Remove the belt cover g335259 Figure 57 5 Remove the 2 M8 x 1 25 x 20 screws securing the belt guide to the engine Remove the belt guide Note Avoid bending the belt guide Belts Service and Repairs Page 7 4 POWER TRX HD Service Manual 3440 740 Rev A ...

Page 69: ...the auger belt from the crankshaft g263060 Figure 59 7 Slide and remove the auger belt from the impeller pulley 8 Tip the unit forward and secure Remove the 4 1 4 20 x 5 8 inch screws securing the bottom cover to the traction frame 9 Remove the bottom cover Depress the auger lever to allow brake to be released 10 Pull the belt out of the bottom of the machine POWER TRX HD Service Manual Page 7 5 B...

Page 70: ... 5 Install the engine pulley and the auger belt to the crankshaft Apply Loctite 243 blue to the bolt Install the bolt securing the engine pulley to the crankshaft Torque the bolt to 40 N m 30 ft lb 6 Install the belt guide to the engine Install the 2 M8 x 1 25 x 20 screws securing the belt guide to the engine Torque the 2 screws to 26 N m 20 ft lb g263059 Figure 60 7 Check for proper clearance bet...

Page 71: ...placement Traction Belt Removal 1 Park the machine on a level surface Stop the engine wait for all moving parts to stop and remove the key 2 Drain the fuel into a suitable container 3 Remove the auger belt Auger Belt Removal page 7 4 4 Remove the impeller pulley POWER TRX HD Service Manual Page 7 7 Belts Service and Repairs 3440 740 Rev A ...

Page 72: ...belt to the lower pulley 2 Tip the unit upright 3 Install the traction belt to the crankshaft pulley 4 Install the impeller pulley 5 Install the auger belt Auger Belt Installation page 7 6 6 Refill the fuel Belt Adjustment Belt adjustments are made by adjusting the control cables See the Controls section for the procedure Deflector Cable Adjustment page 6 14 Belts Service and Repairs Page 7 8 POWE...

Page 73: ...Chapter 8 Auger Housing Table of Contents General Information 8 2 Service and Repairs 8 3 Fixed Scraper 8 5 Scraper Replacement 8 5 POWER TRX HD Service Manual Page 8 1 Auger Housing 3440 740 Rev A ...

Page 74: ...Information The POWER TRX models utilize an all new gearcase featuring a horizontal parting line and heavy duty steel gears Auger Housing General Information Page 8 2 POWER TRX HD Service Manual 3440 740 Rev A ...

Page 75: ...Auger Housing Assembly g263854 Figure 64 1 Traction Frame 5 Ball Bearing 2 Side Drift Breaker 6 Bearing Retainer 3 Auger Housing 7 Scraper Blade 4 Skid POWER TRX HD Service Manual Page 8 3 Auger Housing Service and Repairs 3440 740 Rev A ...

Page 76: ... Frame Assembly g332835 Figure 65 1 Traction Frame 4 Neutral Lock Cover 2 Rear Cover 5 Lower Frame Brace 3 Carrier Stop Auger Housing Service and Repairs Page 8 4 POWER TRX HD Service Manual 3440 740 Rev A ...

Page 77: ... rough the ground is The scraper is adjustable as the mounting holes are slotted g263344 Figure 66 Scraper Replacement The scraper is attached with 5 carriage head bolts with locknuts for the 28 inch model 7 carriage head bolts with locknuts for the 32 inch model Install the new scraper but do not tighten the bolts until the scraper is adjusted POWER TRX HD Service Manual Page 8 5 Auger Housing Se...

Page 78: ...Auger Housing Service and Repairs Page 8 6 POWER TRX HD Service Manual 3440 740 Rev A ...

Page 79: ... Auger Gearbox Table of Contents General Information 9 2 Service and Repairs 9 3 Auger and Traction Assemblies 9 4 Auger Gear Box Replacement 9 6 POWER TRX HD Service Manual Page 9 1 Auger Gearbox 3440 740 Rev A ...

Page 80: ...ral Information The auger gearbox contains a worm gear and helical gear It is driven by a clutching belt from the engine Auger Gearbox General Information Page 9 2 POWER TRX HD Service Manual 3440 740 Rev A ...

Page 81: ...and Repairs Gearbox Auger and Impeller Assemlby g332836 Figure 67 1 RH Auger 3 Impeller 2 Auger Gearcase Assembly 4 LH Auger POWER TRX HD Service Manual Page 9 3 Auger Gearbox Service and Repairs 3440 740 Rev A ...

Page 82: ... screws securing the belt cover to the traction frame g335259 Figure 68 3 Remove the belt guide around the crankshaft pulley avoid bending the guide g263059 Figure 69 4 Remove Phillips screw on the face gear cover Remove the face gear cover 5 Disconnect the chute control cable 6 Disconnect the deflector cable from the deflector Auger Gearbox Service and Repairs Page 9 4 POWER TRX HD Service Manual...

Page 83: ...on the chute control rod g263045 Figure 71 8 Support the auger and traction housings with blocks of wood 9 Remove the 3 5 16 18 x 5 8 inch cap screws on each side connecting the auger to the traction assembly and separate the sections POWER TRX HD Service Manual Page 9 5 Auger Gearbox Service and Repairs 3440 740 Rev A ...

Page 84: ...the impeller and augers secure with cap screws and locknuts Slide the auger shaft bushings on the ends of the auger shaft 2 Insert the impeller shaft through the bearing on the rear of the auger housing The bearing mounting bolts should be slightly loose 3 Secure the auger shaft bushings to the auger side plates with 4 cap screws 2 per side 4 Apply a light coat of anti seize to the impeller shaft ...

Page 85: ...arge Chute Table of Contents General Information 10 2 Service and Repairs 10 3 Chute and Face Gear Cover Replacement 10 4 Chute Gear Replacement 10 5 POWER TRX HD Service Manual Page 10 1 Discharge Chute 3440 740 Rev A ...

Page 86: ...General Information The new POWER TRX snow blowers are all made with steel discharge chutes Discharge Chute General Information Page 10 2 POWER TRX HD Service Manual 3440 740 Rev A ...

Page 87: ...ink 2 Face Gear 8 Chute Gear 3 Face Gear Mount 9 Chute Latch 4 Upper Deflector Assembly 10 Lower Chute Assembly 5 Deflector Gasket 11 Chute Guide 6 Middle Deflector Assembly 12 Chute Post Assembly POWER TRX HD Service Manual Page 10 3 Discharge Chute Service and Repairs 3440 740 Rev A ...

Page 88: ... the cable from the clamp and deflector link g263135 Figure 74 3 Remove the Phillips head screw retaining the gear cover Lift the front of the cover and slide towards the rear g263348 Figure 75 4 Remove the 5 16 18 x 2 1 2 inch bolt on the chute gear 5 Remove the chute Chute and Face Gear Cover Installation 1 Install the chute Secure with a 5 16 18 x 2 1 2 inch bolt on the face gear Discharge Chut...

Page 89: ...r bolt from the chute gear 8 Remove the 2 1 4 20 x 1 2 inch screws securing the gear to the bracket Remove the gear Note A plastic spacer is under the bracket Chute Gear Installation 1 Attach the chute gear to the bracket and secure with 2 1 4 20 x 1 2 inch screws 2 Place the spacer side up on the support tube then set the gear and bracket down on it The 5 16 18 x 2 1 2 inch shoulder bolt goes thr...

Page 90: ...Discharge Chute Service and Repairs Page 10 6 POWER TRX HD Service Manual 3440 740 Rev A ...

Page 91: ...A Foldout Drawings Table of Contents Electrical Drawing Abbreviations A 2 Electrical Schematic with Hand Warmers A 3 Electrical Schematic A 4 POWER TRX HD Service Manual Page A 1 Foldout Drawings 3440 740 Rev A ...

Page 92: ... the wire color followed by a or _ and then the line color e g R BK is a red wire with a black line OR_BK is an orange wire with a black line Note The electrical harness drawings in this chapter identify both the wire color and the wire gauge For example 16 BK on a harness diagram identifies a 16 gauge wire with black insulation Note A splice used in a wire harness will be identified on the wire h...

Page 93: ... Drawing Rev A Sheet 1 3440 740 Rev A Page A 3 Electrical Schematic with Hand Warmers g264089 ...

Page 94: ...Page A 4 3440 740 Rev A Drawing Rev Sheet Electrical Schematic g264090 ...

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