OPERATOR’S MANUAL Snow Thrower Model 640 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 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). If a spark arrester is used, it should be maintained in effective working order by the operator.
TABLE OF CONTENTS Content Page Important Safe Operation Practices ...................................................................3 Assembling Your Snow Thrower ........................................................................5 Know Your Snow Thrower..................................................................................7 Operating Your Snow Thrower...........................................................................8 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.
6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 1. Never tamper with safety devices. Check their proper operation regularly. 2. Disengage all clutch levers and stop engine. Wait until the auger/impeller come to a complete stop. Disconnect the spark plug wire and ground against the engine to prevent unintended starting before cleaning, repairing, or inspecting. 3. Check bolts, and screws for proper tightness at frequent intervals to keep the machine in safe working condition.
SECTION 2: ASSEMBLING YOUR SNOW THROWER Unpacking • • • NOTE: Make sure cables are set in the cable roller guides in the lower rear of the snow thrower . Remove staples or break glue on the top flaps of the carton. Remove any loose parts included with unit (i.e., Operator’s Manual, etc). Cut along corners and lay end of carton down flat. Remove packing material. Roll unit out of carton. Check carton thoroughly for loose parts before discarding.
Final Adjustments Skid Shoes The space between the shave plate and the ground can be adjusted. For close snow removal, place skid shoes in the low position. Use middle or high position when area to be cleared is uneven. • • Adjust skid shoes by loosening the four hex nuts and carriage bolts and moving skid shoes to desired position. See Figure 4. Make certain the entire bottom surface of skid shoe is against the ground to avoid uneven wear on the skid shoes. Retighten nuts and bolts securely.
SECTION 3: KNOW YOUR SNOW THROWER WARNING: Be familiar with all controls and Traction / Auger Control Lock their proper operation. Know how to stop the machine and disengage them quickly. The traction control is located on the right handle. Squeeze the control to engage the wheel drive. Release to stop. Operating Controls This same control also locks the auger control so you can turn the chute directional control without interrupting the snow throwing process.
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. NOTE: Always cover vent hole in primer button when pushing. Additional priming may be necessary for first start if temperature is below 15 degrees Fahrenheit. The spark plug wire was disconnected for safety. Attach spark plug wire to spark plug before starting.
To Stop Engine • To stop engine, remove the ignition key. Do not turn key. Disconnect the spark plug wire from the spark plug to prevent accidental starting while equipment is unattended. • • To prevent starter freeze-up: • • • • • Run engine for a few minutes before stopping to help dry off any moisture on the engine. Electric Starter: Connect power cord to switch box on engine, then to 120 volt AC receptacle. With the engine running, push starter button and spin the starter for several seconds.
• • With the traction control released, there must be clearance between the friction wheel and the drive plate in all positions of the shift lever. With traction control engaged, the friction wheel must contact the drive plate. See Figure 9.
SECTION 6: MAINTAINING YOUR SNOW THROWER WARNING: Before servicing, repairing, lubricant. Avoid getting oil on rubber friction wheel and aluminum drive plate. or inspecting, disengage all clutch levers and stop engine. Wait until all moving parts have come to a complete stop. Disconnect spark plug wire and ground it against the engine to prevent unintended starting. Gear Case • Lubrication IMPORTANT: Do not overfill the gear case. Damage to the seals could result.
SECTION 7: SERVICING YOUR SNOW THROWER WARNING: Before servicing, repairing, • or inspecting, disengage all clutch levers and stop engine. Wait until all moving parts have come to a complete stop. Disconnect spark plug wire and ground it against the engine to prevent unintended starting. • Tip the snow thrower up and forward so that it rests on the housing. Remove six self-tapping screws from the frame cover underneath the snow thrower. See Figure 14 for the location of the hardware.
• Friction Wheel • Support Bracket Frame Note: The unit is shown standing on auger housing Front Auger Auger Pulley Pulley Auger Support Bracket Idler Auger Spring Housing Spring Figure 18 • Figure 16 Drive Belt • • • • • Hex Nut and Bell Washer Chute Rear Auger Belt • Drain the gasoline from the snow thrower, or place a piece of plastic under the gas cap. Tip the snow thrower up and forward, so that it rests on the housing. See Figure 18.
SECTION 8: OFF-SEASON STORAGE WARNING: Never store engine with fuel • in tank indoors or in enclosed, 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. • • Remove all dirt from exterior of engine and equipment. Follow lubrication recommendations on page 11.
SECTION 10: PARTS LIST FOR MODEL 640 4 17 11 9 16 13 8 15 2 14 5 10 6 3 7 12 1 REF. NO. 1 2 3 4 5 6 7 8 9 PART NO. 618-0123 618-0124 710-0642 711-0908 711-0909 711-0910 714-0161 715-0143 717-0528 717-0526 718-0186 DESCRIPTION RH Reducer Housing LH Reducer Housing Hex Screw 1/4-20 x .75 Spiral Axle 24" Spiral Axle 26" Spiral Axle 28" Key Pin-Spiral Worm Gear, 20T Worm Shaft Thrust Collar REF. NO. 10 11 12 13 14 15 16 17 15 3 PART NO.
Model 640 25 65 12 57 55 ITEM #21 GOES TO GROUND WIRE OF LIGHT ASSEMBLY 4 17 67 30 59 12 37 12 42 39 29 64 40 52 20 55 7 43 62 21 14 5 66 46 36 58 42 12 49 69 25 45 9 25 19 38 41 42 25 56 49 1 34 56 18 14 6 11 53 52 20 61 43 40 54 30 42 43 42 31 60 31 25 48 48 45 7 10 2 15 9 35 8 22 32 24 46 45 25 68 33 23 15 45 16 51 28 63 44 3 25 44 16
Model 640 REF. NO. 1 2 3 4 5 6 7 8 9 10 11 12 14 15 16 17 18 19 20 21 22 23 24 25 28 29 30 31 32 33 34 35 PART NO. 625-0007 684-0008A 705-5204A 684-0036 684-0037 684-0103 710-0458 710-0276 710-0449 710-0451 710-0459A 710-0599 710-1003 710-1880 710-3015 711-0653 711-0677 712-0116 712-0121 712-0271 710-0788 712-3010 712-3027 714-0507 720-0201A 720-0232 720-0274 720-0284 726-0100 731-0851A 731-0921 731-1300A REF. NO.
Model 640 27 20 37 Drive Clutch Cable 39 20 5 13 7 37 1 11 38 Auger Clutch Cable 4 6 10 3 40 4 1 2 14 26 36 15 5 16 16” Wheels 25 13” or 15” Wheels 7 31 25 28 23 10 11 12 17 21 18 32 9 24 8 4 1 22 33 1 20 29 8 5 34 19 26 35 Blower Housing 30 1 18 1 Auger Clutch Cable
Model 640 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. 710-1652 784-5688 784-5687A 756-0625 738-0924 684-0030 741-0563 736-0105 712-0116 741-0598 736-0188 784-5689A 710-0538 736-0242 714-0474 736-0160 710-0788 784-5590 784-5638 710-1652 736-0351 REF. NO.
Model 640 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. 1 2 27 3 5 4 8 9 12 11 10 16 26 19 16 19 16 15 16 4 7 6 21 22 13 14 17 18 23 24 REF. NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 PART NO.
Model 640 1 2 3 4 11 10 15 18 32 14 5 9 12 13 7 31 6 8 9 20 16 22 18 19 23 38 27 30 34 21 13 10 28 25 23 13 26 41 37 36 30 35 22 18 32 31 33 16 39 43 40 44 45 40 42 39 REF. NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 18 19 20 21 22 23 25 26 PART NO.
YOUR NOTES Comment Date 22
YOUR NOTES Comment Date 23
MANUFACTURER’S LIMITED WARRANTY 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.
