1

2

OS0660

Minimum of 1/16 in. (1.6 mm)

1.Drive Belt

2.Brake Shoe and Pad

Figure 22

TRACTION DRIVE CLUTCH ADJUSTMENT

If drive slips, adjust traction clutch to compensate for friction disc wear.

To adjust traction clutch:

1.Place speed selector in First (1) Forward.

2.Place unit in service position.

3.With traction clutch disengaged and locking differential engaged (on applicable models) turn wheels while tightening adjustment nut at clutch yoke (Figure 21).

4.Engage and release traction clutch.

5.Turn wheels to check for slight drag.

6.Repeat steps 3 - 5 until wheels begin to drag.

7.Turn adjustment nut back three turns. Wheels will then turn freely.

DRIVE CHAIN

Chain should be taut with little or no play in it. To compensate for looseness or excessive tightness in drive chain:

1.Put unit into service position.

2.Remove bottom cover by removing four cap screws.

3.Loosen nuts on idler hex shaft

(Figure 25). Adjust the idler hex shaft in slot as necessary. Torque the nut to 70-146 lbf-in. (7.9 - 16.5 N•m).

ATTACHMENT DRIVE BELT REPLACEMENT

Remove old attachment drive belt:

1.Shut off engine and allow to cool completely.

2.Remove belt cover (Figure 23).

3.Remove spring clip from chute crank to remove chute crank.

IMPORTANT: Disconnect remote cap deflector and/or electric chute wire harness (if equipped) before proceeding.

4.Loosen cap screws and carefully rotate belt fingers away from belt and sheave (Figure 24).

IMPORTANT: Use care when rotating the belt fingers. DO NOT bend belt fingers out of shape.

5.Remove attachment drive belt from engine sheave (it may be necessary to turn engine sheave using recoil starter handle).

IMPORTANT: To avoid bending bottom cover when tipping unit apart, support handlebars firmly or tip unit up on housing and remove bottom cover by removing four cap screws before separating unit.

6. Support Sno-Thro frame and housing.

3

2

1

OS0792

1.Pivot Pin

2.Housing Cap Screws

3.Belt Cover

Figure 23

CAUTION: Always support Sno-Thro frame and blower housing when loosening the cap screws holding them together. Never loosen cap screws while unit is in service position.

7.Remove cap screws securing housing to frame (one on each side). Tip housing and frame apart on pivot pins (Figure 23).

GB - 25