MTD 31AE663H401, 31AE633E401 manual Maintaining Your Snow Thrower, Drive Wheels, Lubrication

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. This position gives power drive to the left wheel only, making the unit easier to maneuver.

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.

Inside Hole

in Axle

Click Pin

in Outside Hole

Figure 16

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.

SECTION 6: MAINTAINING YOUR SNOW THROWER

Lubrication

Before lubricating, 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.

IMPORTANT: Keep all grease and oil off the rubber friction wheel and aluminum drive plate.

Chute Directional Control

The spiral on the end of the chute directional control and the base of the discharge chute itself should be lubed with multi-purpose automotive grease once a season. See Figure 19.

Wheels

•Oil or spray lubricant into plastic wheel bearings inside the wheel hubs at least once a season. Remove wheels, clean and coat axles with a multi- purpose automotive grease. See Figure 17.

Click Pin

Axle

Oil or spray lubricant here

Figure 17

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. Refer to Figure 14.

Engine

Refer to the seperate engine manual packed with your unit for all engine lubrication instructions.

Auger Shaft

•At least once a season, remove shear bolts from auger shaft. Oil or spray lubricant inside shaft. See Figure 18. Also lubricate the plastic auger bearings at least once a season.

Shear Bolts

Plastic Bearings

Figure 18

Drive and Shifting Mechanism

At least once a season or after every 25 hours of

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