Operator’s Manual Snow Thrower Model H660G 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.
TABLE OF CONTENTS Content Page Important Safe Operation Practices ........................................................................ 3 Assembling Your Snow Thrower ............................................................................. 5 Know Your Snow Thrower....................................................................................... 6 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.
5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 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. Exercise extreme caution when operating on or crossing gravel surfaces. Stay alert for hidden hazards or traffic.
SECTION 2: ASSEMBLING YOUR SNOW THROWER Loose Parts The augers are secured to the auger shaft with two shear bolts and hex lock nuts. If you hit a foreign object or ice jam, the snow thrower is designed so that the bolts may shear. Two replacement shear bolts and nuts are provided for your convenience. Store in a safe place until needed. See Figure 1.
IMPORTANT: The cable should have very little slack, but • should NOT be tight. An overtightened cable may prohibit the auger and drive from disengaging. • WARNING: Over-tightening the cable may • prohibit the auger and drive from disengaging and compromise the safety of the snow thrower. Do NOT overtighten the cable. Unwrap the headlight wire, which is attached to the headlight beneath the handle panel. Wind the headlight wire around the right handle until excess slack is removed.
Shift Lever Chute Tilt Control Traction Control / Auger Control Lock Heated Handles Switch Clean-out Tool Headlight Auger Drive Control Discharge Chute Spark Plug Choke Primer Chute Directional Control Recoil Starter Handle Closed Auger Ignition Key Skid Shoe Throttle Control Open Fuel Shut-Off Valve Figure 7 Heated Handles Switch Ignition Key The heated handles switch is located on the right side of the snow thrower handle panel.
SECTION 4: OPERATING YOUR SNOW THROWER Before Starting Recoil Starter: • WARNING: Read, understand, and follow • all instructions and warnings on the machine and in this manual before operating. • • The spark plug wire was disconnected for safety. Attach spark plug wire to spark plug before starting. Gas And Oil Fill-up • 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.
• • • • • Push primer button two or three times for cold engine start, making sure to cover vent hole in primer button when pushing. DO NOT use primer to restart a warm engine after a short shutdown. Push starter button to start engine. When engine starts, release starter button and move choke gradually to OFF. If engine falters, move choke immediately to FULL and then gradually to OFF.
Drift Cutters (Optional Equipment) Handle Panel Auger Control Lever Drift cutters should be used when operating the snow thrower in heavy drift conditions. On models so equipped, drift cutters are assembled to the auger housing inverted. Remove the carriage bolts by unthreading the hex nuts which secure them, and reinstall the drift cutters in their proper position before operating the snow thrower. See Figure 10.
SECTION 5: MAKING ADJUSTMENTS WARNING: NEVER attempt to make any adjustments while the engine is running, except where specified in the operator’s manual. Frame Cover Tire Pressure (Pneumatic Tires) • The tires are over-inflated for shipping purposes. Before operating, check tire pressure and reduce, if necessary, to between 15 psi and 20 psi. NOTE: If the tire pressure is not equal in both tires, the unit may pull to one side or the other.
Shift Rod • To adjust the shift rod, proceed as follows. • Remove the hairpin clip and slide the shift rod connector up, to separate the upper shift rod from the lower shift rod. See Figure 13. • Place the shift lever into the sixth (6) position. • Rotate the shift arm clockwise (from the operator’s position) as far as it will go. • Thread the upper shift rod downward until the elbow on its lower end aligns with the hole found in the lower shift rod.
Both Wheels Driving: Insert the click pin through the hole in the hub of the rim and the inside hole on the snow thrower’s right axle. This position is good for heavy snow as there is power drive in both wheels. IMPORTANT: Never operate the snow thrower with the click pin inserted through both the rim and the outside hole in the axle. Doing so can result in serious damage to the drive system.
Traction Control / Auger Control Lock hours of operation. The cams can be accessed beneath the handle panel. Use a multi-purpose automotive grease. The cams on the ends of the control rods which interlock the traction drive and auger drive controls must be lubricated at least once a season or every 25 SECTION 7: SERVICE WARNING: Before servicing, repairing, or inspecting, disengage all clutch levers and stop engine. Wait until all moving parts have come to a complete stop.
Belt Cover Friction Wheel Self-Tapping Screws Support Bracket Rear Auger Belt Frame Figure 20 • Roll the front and rear auger belts off the engine pulley. See Figure 21. Front Auger Pulley Auger Pulley Drive Belt Engine Pulley Rear Auger Belt Figure 22 Front Auger Belt Idler Pulley Drive Belt • • • Engine Pulley Idler Pulley • Figure 21 • • • Follow steps 1 through 4 of previous instructions. Pull idler pulley up, and lift belt off engine pulley and friction wheel disc. See Figure 21.
Changing Friction Wheel Rubber • The rubber on the friction wheel is subject to wear and should be checked after 25 hours of operation, and periodically thereafter. Replace the friction wheel rubber if any signs of wear or cracking are found as follows: • • • • • • • 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 11.
NOTE: Fuel stabilizer is an acceptable alternative in • minimizing the formation of fuel gum deposits during storage. Do not drain carburetor if using fuel stabilizer. • • • Remove all dirt from exterior of engine and equipment. Follow lubrication recommendations on page 13. NOTE: When storing any type of power equipment in an poorly ventilated or metal storage shed, care should be taken to rustproof the equipment, especially springs, cables and all moving parts.
SECTION 10: PARTS LIST 68 57 58 55 27 53 72 70 80 65 64 9 27 71 27 24 68 83 74 61 63 59 58 67 73 72 69 82 23 11 69 27 66 54 49 81 77 62 56 76 78 31 45 79 60 11 75 52 9 15 13 29 51 40 46 13 47 5 8 2 5 14 17 20 24 22 10 14 21 3 11 50 9 40 41 18 16 12 4 1 25 26 31 11 43 9 19 35 48 39 37 7 38 28 18 15
Model H660G Ref. No. Part No. Part Description Ref. No. Part No. Part Description 1. 684-0008A Shift Arm Assembly 47. 746-0901 Control Cable 2. 710-0458 Carriage Bolt 5/16-18 x 1.75” 48. 736-0119 Lock Washer 5/16 3. 710-0449 Carriage Bolt 5/16-18 x 2.25” 49. 732-0746 Torsion Spring 4. 710-0788 TT Screw 1/4-20 x 1” 50. 784-5594 Cable Bracket 5. 710-0837 C-Sunk Screw #10-16x 0.625” 51. 784-5604 Handle: Chute Tilt 7. 710-1880 Hex Screw 5/16-18 x.75” 52.
Model H660G 27 1 39 38 Drive Clutch Cable 37 5 13 Auger Clutch Cable 4 30 7 45 6 40 3 4 30 2 14 26 15 5 36 16 44 20 7 31 28 23 10 12 17 41 18 24 32 9 11 25 8 4 1 22 33 29 8 21 1 30 42 5 34 Auger Clutch Cable 19 43 35 46 51 51 49 1 47 50 48 20 1
Model H660G REF. PART REF. PART NO. NO. DESCRIPTION NO. NO. 27 684-0042C 1 710-1652 Self-tapping Screw, 1/4-20 x.
Model H660G 46 52 53 50 49 3 48 47 45 11 10 51 54 14 44 4 1 2 12 6 7 55 15 20 5 8 9 18 19 9 27 22 13 38 43 9 21 13 10 25 28 18 13 26 41 36 30 35 22 18 9 18 33 9 37 39 40 40 34 31 16 32 42 REF. NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 18 19 20 21 22 25 26 27 28 30 PART NO.
Model H660G 1 IMPORTANT: For a properly 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. 27 28 2 3 5 4 8 26 9 12 11 10 16 19 19 16 15 16 4 7 16 6 21 22 13 14 17 25 18 23 20 24 REF. NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 PART NO.
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”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 materials or workmanship.
