Form No. 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.
Revision History Revision History Page 2 POWER TRX™ HD Service Manual 3440-740 Rev A
Preface This service manual was written expressly for Toro service technicians. The Toro Company has made every effort to make the information in this manual complete and correct. Basic shop safety knowledge and mechanical/electrical skills are assumed. The Table of Contents lists the systems and the related topics covered in this manual. We are hopeful that you will find this manual a valuable addition to your service shop.
Service Procedure Icons The following icons appear throughout this Service Manual to bring attention to specific important details of a service procedure. Critical Process This icon is used to highlight: • Installing safety equipment (shields, guards, seat belts, brakes, and R.O.P.S.
Table of Contents Preface ................................................................................................................ 3 Chapter 1: Safety ............................................................................................ 1–1 Safety Instructions ....................................................................................... 1–2 Chapter 2: Specifications and Maintenance .................................................... 2–1 Specifications ..............................
Preface Page 6 POWER TRX™ HD Service Manual 3440-740 Rev A
Chapter 1 Safety Table of Contents Safety Instructions ................................................................................................................................ 1–2 Think Safety First ...............................................................................................................................
Safety Instructions DANGER This safety symbol means danger. When you see this symbol, carefully read the instructions that follow. Failure to obey the instructions could cause serious permanent injury, disability, or death. WARNING This safety symbol means warning. When you see this symbol, carefully read the instructions that follow. Failure to obey the instructions can result in serious injury. CAUTION This safety symbol means caution.
Think Safety First (continued) Battery acid is poisonous and can cause burns. Avoid contact with skin, eyes and clothing. Battery gases can explode. Keep cigarettes, sparks and flames away from the battery. Avoid injury due to inferior parts… Use only original equipment parts to ensure that important safety criteria are met. Avoid injury to bystanders… Always clear the area of bystanders before starting or testing powered equipment.
Think Safety First (continued) The proper class of fire extinguisher should be used in case of fire. Class A extinguishers are for ordinary combustible materials such as paper, wood, cardboard, and most plastics. The numerical rating on these types of extinguishers indicates the amount of water it holds and the amount of fire it can extinguish. Geometric symbol (green triangle). Class B fires involve flammable or combustible liquids such as gasoline, kerosene, grease and oil.
Chapter 2 Specifications and Maintenance Table of Contents Specifications ....................................................................................................................................... 2–2 Torque Specifications ........................................................................................................................... 2–3 Equivalents and Conversions............................................................................................................. 2–8 U.S.
Specifications POWER TRX™ HD Snowthrower Model Name Model Clearing Width Power TRX™ Commercial 1428 Power TRX™ Commercial 1432 Power TRX™ Commercial 1428 Power TRX™ Commercial 1432 38890 38891 38870 38875 71 cm (28 inch) 81 cm (32 inch) 71 cm (28 inch) 81 cm (32 inch) Snow Cut Depth 51 cm (20 inch) Engine Engine Model 420cc Toro Premium OHV LC190FDS Oil Type & Capacity LC190FDS-1 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.
Torque Specifications The recommended fastener torque values are listed in the following tables. For critical applications, as determined by Toro, either the recommended torque or a torque that is unique to the application is clearly identified and specified in the service manual. These torque specifications for the installation and tightening of fasteners shall apply for all fasteners which do not have a specific requirement identified in the service manual.
Metric Bolts and Screws g272209 Figure 2 1. Class 8.8 Specifications and Maintenance: Torque Specifications 2. Page 2–4 Class 10.
Standard Torque for Dry, Zinc Plated, and Steel Fasteners (Inch Series) Thread Size Grade 1, 5, & 8 Fasteners with Thin Height Nuts SAE Grade 1 Bolts, Screws, Studes & Sems with Regular Height Nuts (SAE Grade 2 or Better Nut) in-lb in-lb N • cm 10 ± 2 13 ± 2 147 ± 23 13 ± 2 25 ± 5 282 ± 30 18 ± 2 30 ± 5 339 ± 56 1/4-20 UNC 48 ± 7 53 ± 7 1/4-28 UNF 53 ± 7 5/16-18 UNC 5/16-24 UNF SAE Grade 5 Bolts, Screws, Studs & Sems with Regular Height Nuts (SAE Grade 5 or Better Nut) SAE Grade 8 Bolt
Standard Torque for Dry, Zinc Plated, and Steel Fasteners (Metric Series) Thread Size Class 8.8 Bolts, Screws, Studs with Regular Height Nuts (Class 8 or Stronger Nuts) Class 10.9 Bolts, Screws, Studs with Regular Height Nuts (Class 10 or stronger Nuts) in-lb N • cm in-lb N • cm M5 X 0.8 57 ± 6 644 ± 68 78 ± 8 881 ± 90 M6 X 1.0 96 ± 10 1085 ± 113 133 ± 14 1503 ± 158 ft-lb N • m ft-lb N • m M8 X 1.25 19 ± 2 26 ± 3 28 ± 3 38 ± 4 M10 X 1.5 38 ± 4 52 ± 5 54 ± 6 73 ± 8 M12 X 1.
SAE Grade 8 Steel Set Screws Recommended Torque Thread Size Square Head Hex Socket 1/4 - 20 UNC 140 ± 20 in-lb 73 ± 12 in-lb 5/16 - 18 UNC 215 ± 35 in-lb 145 ± 20 in-lb 1/2 - 13 UNC 75 ± 15 ft-lb 50 ± 10 ft-lb 3/8 - 16 UNC 35 ± 10 ft-lb 18 ± 3 ft-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 Class 8.
Equivalents and Conversions Decimal and Millimeter Equivalents Fractions Decimals mm Fractions Decimals mm 1/64 0.015625 0.397 33/64 0.515625 13.097 1/32 0.03125 0.794 16/32 0.53125 13.484 3/64 0.046875 1.191 35/64 0.546875 13.891 1/16 0.0625 1.588 9/16 0.5625 14.288 5/64 0.078125 1.984 37/64 0.578125 14.684 3/32 0.9375 2.381 19/32 0.59375 15.081 1/8 0.1250 3.175 5/8 0.6250 15.875 9/64 0.140625 3.572 41/64 0.640625 16.272 5/32 0.15625 3.969 21/32 0.
U.S. to Metric Conversions To Convert Into Multiply By Miles Kilometers 1.609 Yards Meters 0.9144 Feet Meters 0.3048 Feet Centimeters 30.48 Inches Meters 0.0254 Inches Centimeters 2.54 Inches Millimeters 25.4 Square Miles Square Kilometers 2.59 Square Feet Square Meters 0.0929 Square Inches Square Centimeters 6.452 Acre Hectare 0.4047 Cubic Yards Cubic Meters 0.7646 Cubic Feet Cubic Meters 0.02832 Cubic Inches Cubic Centimeters 16.39 Tons (Short) Metric Tons 0.
Specifications and Maintenance: Torque Specifications Page 2–10 POWER TRX™ HD Service Manual 3440-740 Rev A
Chapter 3 Troubleshooting Table of Contents General Troubleshooting .......................................................................................................................
GEARS The Systematic approach to defining, diagnosing and solving problems.
General Troubleshooting See Operator’s Manual for troubleshooting information.
Troubleshooting: General Troubleshooting Page 3–4 POWER TRX™ HD Service Manual 3440-740 Rev A
Chapter 4 Engine Table of Contents General Information .............................................................................................................................. 4–2 Service and Repairs ............................................................................................................................. 4–3 Engine Replacement..........................................................................................................................
General Information 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.
Service and Repairs Engine Assembly g332805 Figure 3 1. Engine 4. Belt Guide 2. LED Light Assembly 5. Engine Plate Assembly 3. Light Bracket 6.
Engine Replacement Engine Removal 1. Park the machine on a level surface. Stop the engine, wait for all moving parts to stop and remove the key. 2. Remove the traction belt. Traction Belt Removal (page 7–7) 3. Remove the 2 (1/4–20 x 1 inch) bolts securing the QUICK STICK® rod. Remove the QUICK STICK® rod. 4. Remove the 2 (15 mm) nuts securing the LH engine to the LH engine plate. Repeat on the RH side of the machine. g263346 Figure 4 5.
Engine Installation (continued) g263346 Figure 5 3. Install the QUICK STICK® rod into the gear face on the chute post. Secure 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.
Engine: Service and Repairs Page 4–6 POWER TRX™ HD Service Manual 3440-740 Rev A
Chapter 5 Track Drive System Table of Contents General Information .............................................................................................................................. 5–2 Service and Repairs ............................................................................................................................. 5–3 Track Replacement ............................................................................................................................
General Information The track drive system uses bypasses in the hydro to make the wheel clutch system work.
Service and Repairs Track Drive Assembly g332803 Figure 6 1. Height Adjust Cable 11. Bogey Yoke 2. Adjuster Height Bracket 12. Lynch Pin 3. Welded Latch Assembly 13. Drive Wheel Assembly 4. Link Pivot Assembly 14. Snow Track 5. Flange Bushing 15. Support Tube 6. 7. Welded Tensioner Pivot Bar 16. 17. Front Brace Axle Bushing 8. Axle Bushing Support 18. Bogey Wheel 9. Wheel Bushing 19. Drive Hub Assembly LH Track Support Assembly 20. Track Skid Assembly 10.
Hydro Assembly g332808 Figure 7 1. Upper Hydro Bracket 3. Rear Hydro Bracket 2. Cable Hydro Bracket 4.
Track Replacement Track Removal 1. Park the machine on a level surface. Stop the engine, wait for all moving parts to stop and remove the key. 2. Using a floor jack or overhead lifting device, raise the machine until the tracks are off the ground. 3. Loosen the 2 (9/16 inch) nuts on the rear LH bogey yoke. Repeat on the RH side of the machine. g332809 Figure 8 4. Unscrew the (9/16 inch) rear hex head bolt securing the LH tension plate to the tension lug until the track is loose.
Track Installation (continued) RH side of the machine. If a deflection of 9.5 mm (3/8 inch) is not achieved, see the Operator’s Manual for the deflection setting procedure. g332810 Figure 10 3. Torque the 2 (9/16 inch) nuts on the LH bogey yolk to 47.5 N• m (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.
Hydro Removal (continued) 3. Remove the tracks from the machine. Track Removal (page 5–5) 4. Remove the 3 (1/4–20 x 5/8 inch) screws securing height adjust assembly and pivot bar to the frame. g332811 Figure 12 5. Remove the LH clutch cable from the LH clutch cable 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.
Hydro Removal (continued) g332814 Figure 14 9. Remove the clutch cable springs from the hydro. 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.
Hydro Removal (continued) g335296 Figure 16 11. Remove the nut 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.
Hydro Removal (continued) g332823 Figure 18 13. Remove the 4 (3/8 inch) screws securing the 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.
Hydro Removal (continued) g332819 Figure 20 16. 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 lower frame 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.
Hydro Removal (continued) g332818 Figure 22 18. Using a floor jack, slowly lower and remove the hydro from the machine. Hydro Installation 1. Using a floor jack, slowly raise the hydro and lower frame brace into the housing. 2. 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 lower frame brace to the LH traction frame. Repeat on the RH side of the machine g332816 Figure 23 3.
Hydro Installation (continued) g332818 Figure 24 4. Install the hydro belt to the hydro. g332819 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.
Hydro Installation (continued) g332823 Figure 26 8. Install the rear hydro 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.
Hydro Installation (continued) g335295 Figure 28 10. Install the clutch cable springs to the hydro. g332815 Figure 29 11. Clip the clutch cables into the rear cover.
Hydro Installation (continued) g332814 Figure 30 12. Install the rear cover to traction frame and secure with 4 (1/4–20 x 5/8 inch) bolts. 13. Install the traction cable to the underside of the control panel and secure with a (1/4–20 x 5/8 inch) screw. Torque the screw to 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.
Hydro Installation (continued) g332811 Figure 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.
Track Drive System: Service and Repairs Page 5–18 POWER TRX™ HD Service Manual 3440-740 Rev A
Chapter 6 Controls Table of Contents General Information .............................................................................................................................. 6–2 Service and Repairs ............................................................................................................................. 6–3 QUICK STICK® Replacement ........................................................................................................... 6–5 Control Interlock Replacement.......
General Information The POWER TRX™ models 38890, 38891, 38870, and 38875 are all commercial units and are built with commercial grade handles and controls.
Service and Repairs QUICK STICK® Assembly g263540 Figure 33 1. RH QUICK STICK® Globe 6. Chute Control Lever Assembly 2. 3. Chute Rod Lever Cap 7. 8. LH QUICK STICK® Globe Chute Control Rod 4. Latch Trigger 9. Deflector Control Cable 5.
Handle Bracket Assembly g332807 Figure 34 1. Track Adjustment Lever 7. Upper Traction Cable 2. Lever Bracket 8. Push Pull Hydro Cable 3. Speed Shift Gate 9. HD Handle Assembly 4. 5. Metal Trim Light Clamp 10. 11. Cleanout Stick Bracket Clutch Cable 6. Speed Cable Bracket 12.
QUICK STICK® Replacement QUICK STICK® Removal 1. Park the machine on a level surface. Stop the engine, wait for all moving parts to stop and remove the key. 2. Unhook the Z-bend and disconnect the 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.
QUICK STICK® Removal (continued) g262303 Figure 37 5. Remove the 3 (1/4–20 x 1 inch) carriage bolts and nuts on the chute control rod and lift the 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.
QUICK STICK® Disassembly (continued) g262305 Figure 39 2. Remove the 2 Phillips head screws on the RH of the QUICK STICK® globe (the part that looks like a ball). Remove both halves and 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.
QUICK STICK® Disassembly (continued) g262318 Figure 41 5. Lift the metal latch pawl off the hex 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.
QUICK STICK® Disassembly (continued) g262320 Figure 43 QUICK STICK®Reassembly 1. Place the latch spring over the boss. The straight end of the spring should be down with the hooked end facing up. g262321 Figure 44 2. Slide the latch trigger over the boss until it is fully seated, making sure that the stop on the trigger lever is above the stop on the quick lever. While holding the trigger lever in place, rotate the hooked end of the spring until it hooks under the front edge of the trigger lever. 3.
QUICK STICK® Installation Note: The cable clamp must be installed on the chute control rod or the cable latch will not function. 1. Install the QUICK STICK® onto the control panel. Secure with 3 (1/4–20 x 1 inch) carriage bolts and nuts on the chute control rod. 2. Install the front cover into position. Secure with the latch tabs on the rear. 3. Install the 2 (1/4–10 x 0.82 inch) screws securing the QUICK STICK® cover in place on the underside of the control panel. 4.
Control Interlock Removal (continued) g263047 Figure 46 4. To remove the lockout rod, go to the RH end. There are 2 roll pins on the LH side and 1 in the lockout cam on the RH side. g263046 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.
Control Interlock Removal (continued) g263049 Figure 48 Control Interlock Installation Note: Notice the spring on the lockout latch. The end with the slight bend goes behind the lockout latch and the hooked end goes over the small tab. It is easier to install the latch mechanism first, then hook the end of the spring with a wire to pull into place. 1. Install the traction lever and torsion spring. 2. Install the lockout link onto the lockout rod. 3. Install the lockout cam and auger lever. 4.
Deflector Cable Removal (continued) g263044 Figure 49 3. Remove the cable clamp and disconnect the cable end from the deflector. g263050 Figure 50 4. Remove the 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.
Deflector Cable Adjustment Make sure the QUICK STICK® is in the maximum rear position and centered; ensure the deflector is in the full upward position. Draw the slack out of the cable and secure the clamp. g263051 Figure 51 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.
Shift Rod Adjustment (continued) Note: The adjustment point is a trunnion on the upper end of the shift rod. g263053 Figure 53 2. Pull the shift rod and arm upward as far as they will go. With the shift lever in R2, 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.
Controls: Service and Repairs Page 6–16 POWER TRX™ HD Service Manual 3440-740 Rev A
Chapter 7 Belts Table of Contents General Information .............................................................................................................................. 7–2 Service and Repairs ............................................................................................................................. 7–3 Auger Belt Replacement .................................................................................................................... 7–4 Traction Belt Replacement ......
General Information The POWER TRX™ units use a double-V auger drive belt.
Service and Repairs Auger Drive Components g338135 Figure 55 1. 2. Traction Belt Cable Bracket 7. 8. Traction Idler Arm Square Key 3. Traction Sheave 9. Idler Pulley 4. Cable Guide Cap 10. Cable Anchor 5. Extension Spring 11. Traction Cable 6.
Auger Belt Replacement Auger 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. 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.
Auger Belt Removal (continued) g263059 Figure 58 6. Remove the bolt securing the engine pulley to the crankshaft. If necessary, hold the hub between the engine pulley and engine to keep the crankshaft from turning. Remove the engine pulley and 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.
Auger Belt Installation 1. Using the auger lever, release the brake. 2. Install the auger belt through the bottom of the machine. 3. Install the auger belt onto the impeller pulley. 4. Install the bottom cover to the traction frame and secure with 4 (1/4–20 x 5/8 inch) screws. Tip the unit into proper position. CAUTION When tightening the crank bolt, the engine must be cranked to prevent pinching the traction belt between the pulley sheaves.
Auger Belt Installation (continued) g335259 Figure 61 9. Connect the light to the cover. g335258 Figure 62 10. Refill the fuel. Traction Belt Replacement 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.
Traction Belt Removal (continued) 5. Remove the traction belt from the crankshaft pulley. 6. Tip the unit forward and secure. 7. Remove the traction belt from the lower pulley. g263062 Figure 63 Traction Belt Installation 1. Install the traction 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.
Chapter 8 Auger Housing Table of Contents General Information .............................................................................................................................. 8–2 Service and Repairs ............................................................................................................................. 8–3 Fixed Scraper.....................................................................................................................................
General Information The POWER TRX™ models utilize an all new gearcase featuring a horizontal parting line and heavy duty steel gears.
Service and Repairs Main Frame and 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.
Main Frame Assembly g332835 Figure 65 1. 2. 3. Traction Frame Rear Cover Carrier Stop Auger Housing: Service and Repairs 4. 5.
Fixed Scraper The fixed scraper is bolted solidly to the auger housing, it is intended to be raised slightly off the ground to minimize catching on pavement cracks and solid objects. The amount that it should be raised depends on how 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.
Auger Housing: Service and Repairs Page 8–6 POWER TRX™ HD Service Manual 3440-740 Rev A
Chapter 9 Auger Gearbox Table of Contents General Information .............................................................................................................................. 9–2 Service and Repairs ............................................................................................................................. 9–3 Auger and Traction Assemblies ......................................................................................................... 9–4 Auger Gear Box Replacement .
General Information The auger gearbox contains a worm gear and helical gear. It is driven by a clutching belt from the engine.
Service and Repairs Gearbox, Auger and Impeller Assemlby g332836 Figure 67 1. RH Auger 3. Impeller 2. Auger Gearcase Assembly 4.
Auger and Traction Assemblies Separating the Auger and Traction Assemblies 1. Park the machine on a level surface. Stop the engine, wait for all moving parts to stop and remove the key. 2. Remove the 2 (1/4–20 x 5/8 inch) 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.
Separating the Auger and Traction Assemblies (continued) g263064 Figure 70 7. Remove the 2 (1/4–20 x 1 inch) carriage bolts 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.
Separating the Auger and Traction Assemblies (continued) g335260 Figure 72 10. Once separated, the auger pulley is in the open. 11. Remove the pulley from the input shaft. 12. Remove the 4 (5/16–18 x 5/8 inch) housing bolts on the outside of the auger housing. 13. Slide the gear case, augers, and impellers out of the housing. Auger Gear Box Replacement Auger Gear Box Installation 1. Apply a thin coat of anti-seize to the auger shafts and the impeller shaft.
Chapter 10 Discharge Chute Table of Contents General Information ............................................................................................................................ 10–2 Service and Repairs ........................................................................................................................... 10–3 Chute and Face Gear Cover Replacement ...................................................................................... 10–4 Chute Gear Replacement ..............
General Information The new POWER TRX™ snow blowers are all made with steel discharge chutes.
Service and Repairs Chute Assembly g264049 Figure 73 1. 2. 3. 4. Face Gear Cover Face Gear Face Gear Mount Upper Deflector Assembly 7. 8. 9. 10. Deflector Link Chute Gear Chute Latch Lower Chute Assembly 5. 6. Deflector Gasket Middle Deflector Assembly 11. 12.
Chute and Face Gear Cover Replacement Chute and Face Gear Cover Removal 1. Park the machine on a level surface. Stop the engine, wait for all moving parts to stop and remove the key. 2. Remove the (1/4–20 x 5/8 inch) bolt securing the cable to the clamp and deflector link. Remove 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.
Chute and Face Gear Cover Installation (continued) 2. Install the front of the cover into position. Secure with a screw. Chute Gear Replacement Chute Gear Removal 1. Park the machine on a level surface. Stop the engine, wait for all moving parts to stop and remove the key. 2. Remove the Phillips head screw on the face gear cover. 3. Raise the front of the cover and slide towards the rear. 4.
Discharge Chute: Service and Repairs Page 10–6 POWER TRX™ HD Service Manual 3440-740 Rev A
Appendix A Foldout Drawings Table of Contents Electrical Drawing Abbreviations........................................................................................................A–2 Electrical Schematic with Hand Warmers...........................................................................................A–3 Electrical Schematic...........................................................................................................................
Electrical Drawing Abbreviations The following abbreviations are used for wire harness colors on the electrical schematics and wire harness drawings in this chapter. Abbreviation Color BK Black BR or BM Brown BU Blue GN Green GY Gray OR Orange PK Pink R or RD Red T Tan VIO Violet W or WH White Y or YE Yellow Numerous harness wires include a line with an alternate color. These wires are identified with the wire color followed by a / or _ and then the line color (e.
Electrical Schematic with Hand Warmers g264089 , Drawing Rev A, Sheet 1 3440-740 Rev A Page A–3
Electrical Schematic g264090 Page A–4 3440-740 Rev A , Drawing Rev , Sheet
