Table of Contents
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Operator's Manual
33-inch Two Stage
Snow Thrower
Model 31AE993I401
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 361131 Cleveland, Ohio 44136-0019.
MTD LLC, P.O. BOX 361131 CLEVELAND, OHIO 44136-0019
PRINTED IN U.S.A.
. 770-10278D.fm
FORM NO
(6/2003)
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Table of Contents
Related Manuals for Yard-Man 31AE993I401
Summary of Contents for Yard-Man 31AE993I401
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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 361131 Cleveland, Ohio 44136-0019. MTD LLC, P.O. BOX 361131 CLEVELAND, OHIO 44136-0019 PRINTED IN U.S.A. -
Page 2: Table Of Contents
. A sample model plate is explained below. For future reference, please copy the model number and the serial number of the equipment in the space below. (Model Number) (Serial Number) MTD LLC P. O. BOX 361131 CLEVELAND,OH 44136 www.yardman.com... -
Page 3: Important Safe Operation Practices
SECTION 1: IMPORTANT SAFE OPERATION PRACTICES WARNING: 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 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.
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Page 5: Assembling Your Snow Thrower
SECTION 2: ASSEMBLING YOUR SNOW THROWER Unpacking • Remove staples from the top, sides, and ends of the shipping crate. Set panels aside to avoid tire damage or personal injury. • Remove and discard plastic bag that covers unit. • Roll the unit out of the crate. -
Page 6: Auger Control
Lower Chute Crank Figure 3 • If not already attached, slip the cables that run from the handle panel to the discharge chute into the cable guide located on top of the engine. See Figure 4. Cable Discharge Chute Figure 4 •... -
Page 7: Pneumatic Tires Tire Pressure
• Allow the auger to remain engaged for approximately ten seconds before releasing the auger control. Repeat this several times. • With the engine running in the fast position and the auger control lever in the disengaged “up” position, walk to the front of the machine. •... -
Page 8: Know Your Snow Thrower
SECTION 3: KNOWING YOUR SNOW THROWER WARNING: Be familiar with all the controls on the snow thrower and their proper operation. Know how to stop the machine and disengage them quickly. • Compare the figure below with your equipment and be familiar with its controls before starting it. Fuel Tank Oil Fill Discharge Chute... -
Page 9: Operating Your Snow Thrower
Chute Crank The chute crank is located on the left side of the snow thrower. Use it to change the direction in which snow is thrown. Avoid targetting persons, animals or cars and buildings. Chute Tilt Control The distance snow is thrown can be changed by adjusting the angle of the chute assembly. -
Page 10: Operating Tips
• Determine that your house wiring is a three-wire grounded system. Ask a licensed electrician if you are not certain. If your house wiring system is not a three-wire grounded system, do not use this electric starter under any conditions. If your home electrical system is grounded, but a three-hole receptacle is not available, one should be installed by a licensed electrician before... -
Page 11: Making Adjustments
Chute Clean-Out Tool The chute clean-out tool is conveniently fastened to the rear of the auger housing with a mounting clip. Never use your hand to clean a clogged chute or chute opening; use this clean-out tool instead. • Release both the auger control lever and the traction/auger control lock lever. -
Page 12: Maintaining Your Snow Thrower
• If you placed plastic film under the gas cap earlier, remove it now. Trigger Cables Shift Arm Auger Actuator Bracket Hex Nut & Cupped Washer Figure 11 Auger Control Refer to instructions on page 6 to adjust the auger control. - Page 13 mechanism at least once a season. Use engine oil or a spray lubricant. Refer to Figure 11. Avoid spillage of oil on rubber friction IMPORTANT: wheel and aluminum drive plate. Gear Shaft • Lubricate the gear shaft with 6-in-1 grease (part number 737-0170) at least once a season, or after every 25 hours of operation.
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Page 14: Servicing Your Snow Thrower
Friction Wheel Rubber Follow the instructions below to check the condition of the friction wheel rubber every 25 hours of operation. • Remove the six self-tapping screws from the frame cover underneath the snow thrower. • Visually inspect the friction wheel rubber for excessive wear, cracks, or loose fit on the friction wheel drive hub. -
Page 15: Replacing Belts
Replacing Belts • Disconnect the chute crank assembly at the discharge chute end by removing the hairpin clip and the two flat washers. • Remove the plastic belt cover, located near the engine, by removing the three self-tapping screws and flat washers that secure it. See Figure 17. Hairpin Flat Belt Cover... -
Page 16: Changing Friction Wheel Rubber
Drive Belt • Unhook the extension spring from the belt cover plate. See Figure 21. • Remove drive belt from the engine pulley and bottom drive pulley. • Replace belt and reassemble in reverse order. • Reassemble the two halves of the unit hooking the lower portion of the auger housing over the stationary shoulder bolts in the frame assembly. -
Page 17: Off-Season Storage
Shift Arm Sprocket Sprocket Assembly Shaft Hex Hub of Sprocket Friction Wheel Figure 24 SECTION 8: OFF-SEASON STORAGE WARNING: Never store engine with fuel in tank indoors or in poorly ventilated areas, where fuel fumes may reach an open flame, spark or pilot light as on a furnace, water heater, clothes dryer or other gas appliance. -
Page 18: Troubleshooting
SECTION 9: TROUBLESHOOTING Problem Engine fails to start. Fuel tank empty, or stale fuel. Blocked fuel line. Choke not in ON position Faulty spark plug. Safety key not in ignition switch on engine. Spark plug wire disconnected. Primer button not being used properly. Engine runs erratic. -
Page 19: Parts List
SECTION 10: PARTS LIST FOR MODEL 993I Ref. Part No. Description 710-0276 Carriage Screw 710-0458 Carriage Bolt 5/16-18 x 1.75” 710-0805 Hex Bolt 5/16-18 x 1.5” 710-0895 Hi-Lo Screw 1/4-14 x .75” 710-3015 Hex Screw 1/4-20 x .75” 712-0429 Hex Lock Nut 712-3027 Hex Flange Lock Nut 731-0846C... - Page 20 Model 993I 22 11 21 13...
- Page 21 Model 993I Ref. Part No. Part Description 646-0012 Cable Assembly: Auger/Drive 684-0053B Chute Crank Assembly 705-5266 Chute Crank Bracket 710-1879 Hex Screw 3/8-16 x .880” 710-1878 Hex Screw3/8-16 x 1.75” 710-0458 Carriage Bolt 5/16-18 x 1.75” 710-0572 Carriage Bolt 5/16-18 x 2.5” 710-0891 Shear Bolt 5/16-18 x 1.75”...
- Page 22 Model 993I 34 26 NOTE: For painted parts, please refer to the list of color codes below. Please add the applicable color code, wherever needed, to the part number to order a replacement part. For instance, if a part numbered 700-xxxx is painted Yard-Man Green, the part number to order would be 700-xxxx-0665.
- Page 23 Model 993I Ref. Part No. Part Description 05244A Bearing Housing 618-0281A Bracket Assembly: Auger Break 684-0090A Impeller Assembly: 16” 710-0371 Hex Lock Bolt 5/16-18 x .875” 710-0451 Carriage Bolt 5/16-18 x .750” 710-0459A Hex Screw, Special 3/8-24 x 1.5” 710-0528 Hex Screw 5/16-18 x 1.25”...
- Page 24 Model 993I 14 77 30 42 22 21...
- Page 25 Model 993I Ref. Part No. Part Description 05244A Bearing Housing 618-0279 Dogg Assembly LH 618-0280 Dogg Assembly RH 618-0282D Shift Assembly 618-0296A Friction Wheel Assembly* 684-0117 Shift Rod Assembly 684-0118 Actr. Bracket Assembly: Auger 684-0119 Actr. Bracket Assembly: Drive 684-0122 Sprocket Assembly 32T 684-0161 Shift Arm Assembly...
- Page 26 Model 993I 6 15 16 12...
- Page 27 Model 993I Ref. Part No. 07386 Washer 684-0123A Belt Cover Bracket Assembly 710-0191 Hex Screw 3/8-24 x 1.25” 710-0237 Hex Screw 5/16-24 x .625” 710-0502A TT Sems Screw 710-0607 TT Screw 5/16-18 x 0.5” 710-1245 Hex Lock Screw 5/16-24 x .875” 712-0116 Jam Nut 714-0118...
- Page 28 MANUFACTURER’S LIMITED WARRANTY FOR: The limited warranty set forth below is given by MTD LLC with respect to new merchandise purchased and used in the United States, its possessions and territories. MTD LLC warrants this product against defects for a period of...