MTD 31AE663H401, 31AE633E401 Changing Friction Wheel Rubber, Drive Belt, Auger, Housing Spring

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Drive

Rear AugerBelt

Belt

Engine

Pulley

Front

Auger

Belt

Engine

Pulley

Idler

PulleyIdler

Pulley

Figure 21

•Unhook the idler spring from the hex bolt on the auger housing. See Figure 22.

•Back out the stop bolt until the support bracket rests on the auger pulley. See Figure 23.

NOTE: It may be necessary to loosen the six nuts that connect the frame to the auger housing to aid in belt removal.

•Lift the rear auger belt from the auger pulley, and slip belt between the support bracket and the auger pulley. See Figure 22. Repeat this step for the front auger belt.

Friction

Wheel

Frame

Support

Bracket

Auger

Belt

Auger	Idler		Support
Pulley	Spring	Auger	Bracket
		Auger
		Housing Spring

Figure 22

•Replace both auger drive belts by following instructions in reverse order.

NOTE: If you placed plastic film under the gas cap, be certain to remove it before operating the snow thrower.

Drive Belt

•Follow the first four steps of the instructions for servicing the auger belts.

•Pull idler pulley up, and lift belt off engine pulley and friction wheel disc. See Figure 21.

•Back out the stop bolt until the support bracket rests on the auger pulley. See Figure 23.

•Slip belt between friction wheel and friction wheel disc. See Figure 23. Remove and replace belt.

•Reassemble the parts removed earlier.

NOTE: The support bracket must rest on the stop bolt after the new belt has been assembled. See Figure 23.

Friction

WheelFriction Wheel

Disc

Drive Belt

Support Bracket

Stop

Bolt

Figure 23

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.

•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.

•Remove six self-tapping screws from the frame cover underneath the snow thrower.

•Remove the click pins which secure the wheels, and remove the wheels from the axle.

•Using a 7/8" wrench to hold the shaft, loosen, but do not completely remove, the hex nut and bell washer on the left end of gear shaft. See Figure 24.

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Contents Operator’s Manual Table of Contents Operation Important Safe Operation PracticesTraining PreparationYour Responsibility Maintenance And StorageAssembling Handle Assembling Your Snow ThrowerUnpacking Loose PartsModel E633E Attaching Chute Directional ControlTraction Control and Shift Lever Final AdjustmentsModel 663H Chute Directional Control Support BracketTire Pressure Pneumatic Tires Skid ShoeKnow Your Snow Thrower To Start Engine Operating Your Snow ThrowerBefore Starting Gas and Oil Fill-UpOperating Tips To Stop EngineTo Engage Drive To Engage AugersTraction Control Chute AssemblyAuger Control Skid ShoeMaintaining Your Snow Thrower Drive WheelsLubrication Service Belt Removal and ReplacementShave Plate and Skid Shoes Auger Housing SpringChanging Friction Wheel Rubber Drive BeltEngine AugersProblem Cause Remedy TroubleshootingParts List for Models E633 and E663 Part Description Models E633 and E663Drive Clutch Cable Part Description Ref. No Models E633 and E663 Ref. No Part Description Ref. No Part DescriptionRef. No. Part No Part Description Model E633Model E663 Model E633 Model E663 MANUFACTURER’S Limited Warranty for