Table of Contents
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Operator's Manual
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 forest-
covered, 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). If a spark arrester is used, it should be maintained in effective working order by the operator.
In the State of California the above is required by law (Section 4442 of the California Public Resources Code). Other states may have
similar laws. Federal laws apply on federal lands. A spark arrester for the muffler is available through your nearest engine authorized
service dealer or contact the service department, P.O. Box 368022 Cleveland, Ohio 44136-9722.
MTD PRODUCTS INC. P.O. BOX 368022 CLEVELAND, OHIO 44136-9722
PRINTED IN U.S.A.
ECO No. 1481
Snow Thrower
Models
31AE633E401
31AE663H401
770-10020B.fm
FORM NO.
(6/2000)
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Table of Contents
Related Manuals for Yard-Man 31AE633E401
Summary of Contents for Yard-Man 31AE633E401
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Page 1: Snow Thrower
Federal laws apply on federal lands. A spark arrester for the muffler is available through your nearest engine authorized service dealer or contact the service department, P.O. Box 368022 Cleveland, Ohio 44136-9722. MTD PRODUCTS INC. P.O. BOX 368022 CLEVELAND, OHIO 44136-9722 PRINTED IN U.S.A. -
Page 2: Table Of Contents
(Model Number) (Serial Number) MTD PRODUCTS INC CLEVELAND, OHIO 44136 CALLING CUSTOMER SUPPORT If you have difficulty assembling this product or have any questions regarding the controls, operation or maintenance of this unit, please call the Customer Support Department. -
Page 3: Important Safe Operation Practices
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. -
Page 4: 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. -
Page 5: Assembling Your Snow Thrower
SECTION 2: ASSEMBLING YOUR SNOW THROWER Unpacking • 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. •... - Page 6 • 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.
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Page 7: Final Adjustments
If the spiral on the chute directional control cannnot be adjusted properly, follow the steps below: • 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. - Page 8 • 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.
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Page 9: Know Your Snow Thrower
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. Traction Drive / Auger Control Lock Gas Tank Discharge Chute Auger Skid Shoe Traction Control The traction control is located on the right handle. -
Page 10: Operating Your Snow Thrower
Chute Tilt Control 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. Discharge Chute The angle of the discharge chute controls the distance that the snow is thrown. -
Page 11: Operating Tips
• When disconnecting the power cord, always unplug from the three-prong receptacle first, and then from the snow thrower. Recoil Starter • Rotate choke knob to FULL choke position (cold engine start). • If engine is warm, place choke in OFF position instead of FULL. -
Page 12: Making Adjustments
SECTION 5: MAKING ADJUSTMENTS WARNING: NEVER attempt to clean chute or make any adjustments while engine is running. 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. Skid Shoe The space between shave plate and ground can be adjusted by raising or lowering the skid shoes. -
Page 13: Maintaining Your Snow Thrower
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. 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. -
Page 14: Service
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. Gear Case The gear case is lubricated with grease at the factory and does not require checking. -
Page 15: Changing Friction Wheel Rubber
Rear Auger Belt Engine Pulley Idler Pulley Idler Pulley Figure 21 • Unhook the idler spring from the hex bolt on the auger housing. See Figure 22. • Back out the stop bolt until the support bracket rests on the auger pulley. See Figure 23. NOTE: It may be necessary to loosen the six nuts that connect the frame to the auger housing to aid in belt removal. - Page 16 Bell Washer Snow thrower shown resting on its auger housing; wheels not shown for clarity. Figure 24 • Lightly tap the hex nut to dislodge the ball bearing from the right side of frame before removing the hex nut and bell washer from left end of shaft. •...
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Page 17: Troubleshooting
SECTION 9: TROUBLESHOOTING Problem Engine fails to start 1. Fuel tank empty, or stale fuel. 2. Blocked fuel line. 3. Choke not in ON position 4. Faulty spark plug. 5. Safety key not in ignition switch on engine. 6. Spark plug wire disconnected. 7. -
Page 18: Parts List
SECTION 10: PARTS LIST FOR MODELS E633 AND E663 19 10 12 20 45 46... - Page 19 Models E633 and E663 Ref. Part No. Part Description 684-0008A Shift Arm Assembly 684-0053A Lower Chute Crank (E663) 705-5204A Chute Crank Ass’y (E633) 705-5266 Chute Crank Bracket 710-0262 Carriage Bolt, 5/16-18 x 1.5 710-0449 Carriage Bolt, 5/16-18 x 2.25 710-0788 Self Tapping Screw, 1/4-20 x 1 710-3008 Hex Cap Screw, 5/16-18 x .75...
- Page 20 Models E633 and E663 (Drive Clutch Cable) NOTE: On units with 16” wheels, cable is routed under axle. NOTE: Axle goes here for 16” wheels only...
- Page 21 Models E633 and E663 Ref. No. Part No. Part Description 656-0021A Friction Wheel Disc Assembly 684-0013B Shift Rod Assembly 684-0021 Support Bracket: Friction Wheel 684-0042C Bearing Assembly: Friction Wheel 710-0538 Hex Bolt: 5/16-18 x .625” 710-0599 Self-Tapping Screw 1/4-20 x 0.5” 710-0809 Self-Tapping Screw 1/4-20 x 1.25”...
- Page 22 Models E633 and E663...
- Page 23 Models E633 and E663 Ref. No. Part No. Part Description 712-0116 Lock Jam Nut 3/8-24 756-0178 Flat Idler 784-5632A Auger Idler Arm 710-0459A Hex Cap Screw 3/8-24 x 1.50 738-0281 Shoulder Screw 736-0174 Wave Washer 732-0611 Extension Spring 712-3068 Hex Nut 5/16-18 712-3010 Hex Nut 5/16-18 736-0119...
- Page 24 Model E633 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 Ref. No. Part No. Part Description 710-0599 Hex Washer Screw 1/4-20 x.5 731-1324 Belt Cover...
- Page 25 Model E663 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 Ref. No. Part No. Part Description 710-0599 Hex Washer Screw 1/4-20 x .50 731-1324 Belt Cover...
- Page 26 Model E633...
- Page 27 Model E663...
- Page 28 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...