MTD 737-0168 Manual del operador descargar pdf (Pagina 17)

ChangingFrictionWheelRubber

The rubber on the friction wheel is subject to wear and

should be checked after the first 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 screws from the frame cover

underneath the snow thrower.

• Remove the left wheel from the axle.

• Using a 7/8" wrench, hold the hex shaft and remove

the hex bolts and cupped washer and bearing from

left side of the frame. Refer to Figure 14.

• Holding the friction wheel assembly, slide the hex

shaft out of the left side of the unit. The spacer on

the right side of the hex shaft will fall and the

sprocket should remain hanging lose in the chain.

See Figure 24.

Shift Arm Assembly

• Insert the pin from the shift arm assembly into the

friction wheel assembly and hold assembly in

position. Refer to Figure 24.

Screw_

Hub

Plates

Bearing

Friction Wheel Rubber

Figure 25

• Slide the hex shaft through the left side of the

housing and through the friction wheel assembly.

• Insert the hex shaft through the sprocket and the

spacer. Make certain that the chain engages both

the large and the small sprocket.

NOTE: If the sprocket fell from the snow thrower while

removing the hex shaft, place the sprocket on the hex

shaft. Position the hex hub of the sprocket toward the

friction wheel when sliding the sprocket on to the hex

shaft. See Figure 26.

Figure 24

• Lift the friction wheel assembly out between the

axle shaft and the drive shaft assemblies.

• Remove four screws securing the friction wheel

rubber between the friction wheel plates. See

Figure 25. Discard old rubber.

• Reassemble the new friction wheel rubber to the

friction wheel assembly, tightening the four screws

in rotation and with equal force. SeeFigure 25. It is

important to assemble the rubber on the friction

wheel symmetrically for proper functioning.

Rex

Hex Hub

Spacer

Figure 26

• Secure with the cupped washer and hex bolt

removed earlier.

• Secure the frame cover with six self-tapping

screws. Put the snow thrower down to its normal

operating position.

NOTE: If you placed plastic film under the gas cap, be

certain to remove #.

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MTD 737-0168 Manual del operador Pagina 17

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