Table of Contents
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OPERATOR'S MANUAL
IMPORTANT: READ SAFETY RULES AND INSTRUCTIONS CAREFULLY
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.
33" Snow Thrower
Model 31AE993I401
FORM NO.
770-10278B.fm
(5/2001)
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Summary of Contents for Yard-Man 31AE993I401
- Page 1 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. 33” Snow Thrower Model 31AE993I401 770-10278B.fm FORM NO. (5/2001)
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Page 2: Table Of Contents
Content Important Safe Operation Practices... 3 Assembling Your Snow Thrower ... 5 Knowing Your Snow Thrower ... 7 Operating Your Snow Thrower ... 9 Making Adjustments ... 10 Maintaining Your Snow Thrower... 12 Servicing Your Snow Thrower ... 13 Off-Season Storage... 17 Trouble Shooting Guide... -
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
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. -
Page 5: Assembling Your Snow Thrower
SECTION 2: ASSEMBLING YOUR SNOW THROWER NOTE: Any reference in this manual to the left or right side of the snow thrower is observed from the operator’s position. Unpacking • Remove staples from the top, sides, and ends of the shipping crate. •... -
Page 6: Final Adjustments
shift rod. Tap the connector until it locks over the lower shift rod. See Figure 2. NOTE: If the connector is not properly assembled, the shift rod will pivot and you will not be able to change speeds or change directions. •... -
Page 7: Knowing Your Snow Thrower
• Loosen the jam nut and thread the cable in (for less slack) or out (for more slack) as necessary. See Figure 7. • Recheck adjustment; readjust as necessary and tighten the jam nut. “Z” End Jam Nut Auger Control Cable Figure 7 Skid Shoes... -
Page 8: Shift Lever
Shift Lever The shift lever is located in the center of the handle panel and is used to determine ground speed and direction of travel. It can be moved into any of eight positions. See Figure 9. Always release traction the control before IMPORTANT: changing speeds. -
Page 9: Operating Your Snow Thrower
SECTION 4: OPERATING YOUR SNOW THROWER Before Starting WARNING: Read, understand, and follow all instructions and warnings on the machine and in this manual before operating. Gas And Oil Fill-up Service the engine with gasoline and oil as instructed in the separate engine manual packed with your snow thrower. -
Page 10: Making Adjustments
To Stop Engine • Run engine for a few minutes before stopping to help dry off any moisture on the engine. • To help prevent possible freeze-up of starter, proceed as follows. Electric Starter: • Connect power cord to switch box on engine, then to 120 volt AC receptacle. -
Page 11: Skid Shoe Adjustment
Trigger Cables Shift Arm Auger Actuator Bracket Hex Nut And Cupped Washer Figure 10 • 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. -
Page 12: Maintaining Your Snow Thrower
SECTION 6: MAINTAINING YOUR SNOW THROWER WARNING: Before lubricating, repair- ing, or inspecting, disengage all clutch levers and stop engine. Wait until all mov- ing parts have come to a complete stop. Disconnect the spark plug wire and ground it against the engine to prevent unintended starting. -
Page 13: Servicing Your Snow Thrower
Do not overfill the gear case, since IMPORTANT: damage to the seals could result. Be sure the vent plug is free of grease in order to relieve pressure. Auger Bearings and Shaft Every season lubricate the auger bearings and the bearings on the side of the frame with light oil. -
Page 14: Replacing Belts
Shear Bolts Washer Carriage Bolt Hex Nut Figure 15 • Remove the six carriage bolts (three per side), belleville washers and hex nuts which attach slide shoes to the snow thrower on two sides. See Figure 8. • Reassemble new slide shoes with the hardware removed earlier (cupped side of belleville washer against the slide shoes). -
Page 15: Changing Friction Wheel Rubber
• Pull the brake bracket assembly towards the cable guide roller and unhook the auger cable “Z” fitting. • Remove the upper bolts and lock washers which attach the auger housing assembly to the frame assembly using a 9/16” wrench. See Figure 16. •... -
Page 16: Off-Season Storage
Shift Arm Assembly Shift Arm Sprocket Assembly Sprocket Friction Wheel Friction Wheel Friction Wheel Plates Screws Friction Wheel Rubber Figure 20 • Reassemble the new friction wheel rubber to the friction wheel assembly, tightening the six screws in rotation and with equal force. It is important to assemble the rubber on the friction wheel symmetrically for proper functioning. - Page 17 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.
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Page 18: Trouble Shooting Guide
Model 31AE993I401 34 26... -
Page 19: Parts List
Model 31AE993I401 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 20 Model 31AE993I401 15 48 61 53 69 5 54 27 75 50 26 61 48...
- Page 21 Model 31AE993I401 Ref. Part No. Part Description 05523 Support Bracket: Pivot 618-0278 Bush Assembly 618-0279 Dogg Assembly LH 618-0280 Dogg Assembly RH 618-0282B Shift Assembly 618-0296 Wheel Bearing Assembly 684-0115 Support Bracket Assembly 684-0116 Shift Arm Assembly 684-0117 Shift Rod Assembly 684-0118 Auger Actuator Bracket Assy.
- Page 22 Model 31AE993I401 21 13 22 11...
- Page 23 Model 31AE993I401 Ref. Part No. Part Description 646-0012 Cable Assembly: Auger/Drive 684-0053B Chute Crank Assembly 705-5266 Chute Crank Bracket 710-3119 Hex Screw 3/8-16 x .75” 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”...
- Page 24 Model 31AE993I401 6 15 Ref. 07386 684-0123A 710-0191 710-0237 710-0502A 710-0607 710-1245 712-0116 714-0118 731-2531 732-0303 736-0159 736-0217 736-0242 736-0264 738-0215A 748-0234 754-0131 756-0240 756-0241B 784-5726 712-0324 732-0705 736-0173 629-0071 Part No. Description Washer Belt Cover Bracket Assembly Hex Screw 3/8-24 x 1.25”...
- Page 25 Model 31AE993I401 Ref. 710-0276 710-0458 710-0805 710-0896 710-3015 712-0429 712-3027 731-0846C 731-0851A 731-1313C 731-0903D 784-5680 736-0159 736-0231 736-0506 746-0902 746-0903 784-5594 784-5604 684-0102 710-0459A 710-0599 711-0653 712-0116 784-5682 714-0104 732-0145 732-0193 732-0746 735-0199A 736-0105 784-5681 736-0509 747-0877 748-0362 748-0363 784-5619A 784-5679 Part No.
- Page 26 Notes...
- 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 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...