Operator’s Manual Snow Thrower Models 31AE633E401 31AE663H401 IMPORTANT: Read safety rules and instructions carefully before operating equipment. Warning: This unit is equipped with an internal combustion engine and should not be used on or near any unimproved forestcovered, brush-covered or grass-covered land unless the engine’s exhaust system is equipped with a spark arrester meeting applicable local or state laws (if any).
TABLE OF CONTENTS Content Page Important Safe Operation Practices................................................................... 3 Assembling Your Snow Thrower ....................................................................... 5 Know Your Snow Thrower ................................................................................. 9 Operating Your Snow Thrower .......................................................................... 10 Making Adjustments ........................................
SECTION 1: IMPORTANT SAFE OPERATION PRACTICES This symbol points out important safety instructions which, if not followed, could endanger the personal safety and/or property of yourself and others. Read and follow all instructions in this manual before attempting to operate this machine. Failure to comply with these instructions may result in personal injury. When you see this symbol—heed its warning.
5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. Maintenance And Storage chute. Keep all safety devices in place and working. Never run an engine indoors or in a poorly ventilated area. Engine exhaust contains carbon monoxide, an odorless and deadly gas. Do not operate machine while under the influence of alcohol or drugs. Muffler and engine become hot and can cause a burn. Do not touch. Exercise extreme caution when operating on or crossing gravel surfaces.
SECTION 2: ASSEMBLING YOUR SNOW THROWER Unpacking • • • • • NOTE: On model 633E, remove the lower wing nut and hardware from the right side of the handle only. The wing nut for the left side is in place on the chute directional control. Remove screws from the top sides and ends of the shipping crate. Set panel aside to avoid tire punctures or personal injury. Remove and discard plastic bag that covers unit. Roll unit out of crate. Check crate thoroughly for loose parts before discarding.
• Secure the upper handle and lower handle with the two plastic wing nuts, cupped washers and carriage bolts previously removed. Attach these hardware on the lower hole in the handles. See Figure 3. • NOTE: On model 633E, attach the wing nut, cupped washer and carriage bolt in the lower hole on the right side only. The hardware in the left lower hole will be attached later. • • • Unwrap the headlight wire which is attached to the headlight beneath the handle panel.
If the spiral on the chute directional control cannnot be adjusted properly, follow the steps below: • of the chute directional control, and insert the hairpin clip again. See Figure 10. Loosen the two hex nuts which secure the chute directional control support bracket (see Figure 8) to the snow thrower housing, beside the discharge chute.
• • • Release the auger control. The cable should be straight. Make certain you can depress the auger control against the left handle completely. If adjustment is necessary, proceed as follows: Loosen the jam nut and thread the cable in (for less slack) or out (for more slack) as necessary. See Figure 11. • Raise or lower the skid shoe to desired position. NOTE: Make certain the entire bottom surface of skid shoe is against the ground to avoid uneven wear on the skid shoes.
SECTION 3: KNOW YOUR SNOW THROWER WARNING: Be familiar with all the controls and their proper operation. Know how to stop the machine and disengage them quickly. Shift Lever Traction Drive / Auger Control Lock Chute Tilt Control Gas Tank Discharge Chute Auger Drive Clutch Chute Directional Control Primer Choke Closed Open Metal Loop Auger Ignition Key Skid Shoe Throttle Control Rope Starter Handle Rubber Boot Figure 13 Traction Control to stop the snow throwing action.
Chute Tilt Control Headlight The distance snow is thrown can be adjusted by adjusting the angle of the chute assembly. Move the chute tilt control forward to decrease the distance, and towards the rear to increase the distance. The headlight is on whenever the engine is running. Discharge Chute Safety Ignition Key The angle of the discharge chute controls the distance that the snow is thrown. Tilt the discharge chute up for greater distance; tilt down for less distance.
• When disconnecting the power cord, always unplug from the three-prong receptacle first, and then from the snow thrower. IMPORTANT: Do not lose ignition key. Keep it in a safe place. Engine will not start without the ignition key. Recoil Starter To Engage Drive • • • • • Rotate choke knob to FULL choke position (cold engine start). If engine is warm, place choke in OFF position instead of FULL. Push primer button two or three times for cold engine start.
SECTION 5: MAKING ADJUSTMENTS WARNING: NEVER attempt to clean • chute or make any adjustments while engine is running. • Retighten the jam nut to secure the cable when correct adjustment is reached. Reassemble the frame cover. NOTE: If you placed plastic film under the gas cap, be certain to remove it before operating the snow thrower. Chute Assembly The distance snow is thrown can be adjusted by changing the angle of the chute assembly. Refer to Chute Tilt Control on page 10.
Drive Wheels The wheels may be adjusted for two different methods of operation. The adjustment is made by placing the click pins in one of two different holes on the right side of the unit. See Figure 16. Inside Hole in Axle One Wheel Driving—Insert the click pin only through the outside hole of the axle (not the rim) on the right side of the snow thrower. This position gives power drive to the left wheel only, making the unit easier to maneuver.
operation, remove rear cover. Lubricate any chains, sprockets, gears, bearings, shafts, and shifting mechanism at least once a season. Use engine oil or a spray lubricant. Avoid getting oil on rubber friction wheel and aluminum drive plate. Refer to Figure 14. must be lubricated at least once a season or every twenty five hours of operation. The cams can be accessed beneath the handle panel. Use a multipurpose automotive grease.
Figure 22 Drive Belt Rear Auger Belt • Replace both auger drive belts by following instructions in reverse order. NOTE: If you placed plastic film under the gas cap, be certain to remove it before operating the snow thrower. Engine Pulley Drive Belt • Front Auger Belt • • • Engine Pulley Idler Pulley • Idler Pulley Follow the first four steps of the instructions for servicing the auger belts. Pull idler pulley up, and lift belt off engine pulley and friction wheel disc. See Figure 21.
• Hex Nut / Bell Washer Position the friction wheel assembly up onto the pin of the shift rod assembly, and slide the shaft through the assembly. Reassemble in reverse order. NOTE: If you placed plastic film under the gas cap, be certain to remove it. Augers The augers are secured to the spiral shaft with two shear bolts and hex lock nuts. See Figure 26. If you hit a foreign object or ice jam, the snow thrower is designed so that the bolts may shear.
SECTION 9: TROUBLESHOOTING Problem Engine fails to start Cause 1. Fuel tank empty, or stale fuel. 2. 3. 4. 5. 6. 7. 8. Engine runs erratic Remedy 1. Fill tank with clean, fresh gasoline. Fuel becomes stale after thirty days unless a fuel stabilizer is used. Blocked fuel line. 2. Clean the fuel line. Choke not in ON position 3. Move switch to ON position Faulty spark plug. 4. Clean, adjust gap or replace. Safety key not in ignition switch on engine. 5. Insert the key fully into the switch.
SECTION 10: PARTS LIST FOR MODELS E633 AND E663 70 75 67 73 76 35 74 44 68 32 38 32 32 49 51 11 72 42 39 9 29 45 46 45 33 35 36 32 48 43 69 44 4 19 10 18 34 54 47 40 37 11 12 20 5 39 11 59 31 66 9 A B 42 43 55 28 53 23 29 55 64 62 B A 15 16 63 14 21 65 24 60 59 3 26 1 6 22 25 20 4 54 13 12 18 7 52 61 55 15 56 2 12 20 11 57 8 78 17 18 16 14
Models E633 and E663 Ref. No. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31. 32. 33. 34. 35. 36. 37. 38. 39. Part No.
Models E633 and E663 5 27 23 28 22 6 10 29 35 39 38 33 6 14 27 21 10 13 15 20 25 NOTE: Axle goes here for 16” wheels only 29 22 12 40 28 4 7 34 33 24 8 17 6 27 30 13 36 2 37 1 32 18 8 3 19 11 20 31 (Drive Clutch Cable) NOTE: On units with 16” wheels, cable is routed under axle.
Models E633 and E663 Ref. No. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. Part No. 656-0021A 684-0013B 684-0021 684-0042C 710-0538 710-0599 710-0809 710-1652 712-0116 712-0703 712-0711 714-0126 714-0143 714-0474 715-0249 717-1444 717-1445 721-0263 732-0264 736-0105 736-0160 Part Description Friction Wheel Disc Assembly Shift Rod Assembly Support Bracket: Friction Wheel Bearing Assembly: Friction Wheel Hex Bolt: 5/16-18 x .625” Self-Tapping Screw 1/4-20 x 0.
Models E633 and E663 2 3 1 4 5 11 10 9 15 18 14 12 7 8 13 32 6 9 18 31 19 20 16 22 23 27 21 10 13 30 34 28 25 23 13 38 26 35 30 22 18 32 33 31 16 41 37 36 17 39 40 24 40 42 39 29 22
Models E633 and E663 Ref. No. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. Part No. 712-0116 756-0178 784-5632A 710-0459A 738-0281 736-0174 732-0611 712-3068 712-3010 736-0119 05931 741-0309 710-0451 705-5226 684-0055B 684-0039C 712-3010 712-0429 736-0242 741-0475 784-5647 731-1379A 712-0324 736-0463 Part Description Ref. No. 24. 25. 26. 27. 28. 29. 30. 31. 32. 33. Lock Jam Nut 3/8-24 Flat Idler Auger Idler Arm Hex Cap Screw 3/8-24 x 1.
Model E633 1 2 28 27 3 4 9 16 11 12 13 8 10 4 7 6 15 22 5 20 Ref. No. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 14 17 18 19 23 24 25 21 26 IMPORTANT: For a proper working machine, use Factory Approved Parts. V-BELTS are specially designed to engage and disengage safely. A substitute (non OEM) V-Belt can be dangerous by not disengaging completely 24 Part No.
Model E663 1 2 27 3 4 5 26 9 16 19 8 1110 12 15 4 7 16 16 21 22 6 13 14 18 17 25 23 20 Ref. No. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 24 IMPORTANT: For a proper working machine, use Factory Approved Parts. V-BELTS are specially designed to engage and disengage safely. A substitute (non OEM) V-Belt can be dangerous by not disengaging completely 25 Part No. Part Description 710-0599 Hex Washer Screw 1/4-20 x .
Model E633 26
Model E663 27
MANUFACTURER’S LIMITED WARRANTY FOR: The limited warranty set forth below is given by MTD PRODUCTS INC (“MTD”) with respect to new merchandise purchased and used in the United States, its possessions and territories. MTD warrants this product against defects in material and workmanship for a period of two (2) years commencing on the date of original purchase and will, at its option, repair or replace, free of charge, any part found to be defective in material or workmanship.
