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.

Friction

Wheel

Gear Shaft

Drive

Plate

Figure 9

If adjustment is necessary:

Loosen the jam nut on the traction drive cable and thread the cable in or out as necessary.

Retighten the jam nut to secure the cable when correct adjustment is reached.

Reassemble the frame cover.

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

Auger Control

Refer to details on page 6 to adjust the auger control.

Shift Rod

To adjust the shift rod, proceed as follows.

Remove hairpin clip and slide shift rod connector up to separate upper and lower shift rod. See Figure 10.

Place shift lever in sixth (6) position or fastest forward speed.

Rotate shift arm assembly counter clockwise as far as it will go.

Thread the upper shift rod on the ferrule to align upper shift rod elbow with lower shift rod hole.

Insert cotter pin and slide shift rod connector down. Tap to secure the connector into place.

IMPORTANT: Check for correct adjustment of the shift lever rod as instructed on page 6, before operating the snow thrower.

Shift

Lever

Upper

Ferrule

Shift Rod

 

Shift Rod

 

Connector

 

Lower

Hairpin

Clip

Shift Rod

 

 

Shift Arm

 

Assembly

Figure 10

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 11.

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 11

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.

10

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MTD 640 manual Auger Control, Shift Rod, Drive Wheels