23
5.2.3 TUB ROTATION DRIVE
5.2.3.1 BELT TIGHTENING
When the tub rotation drive is engaged, an idler is
moved into position to tighten the belt and transmit
power. As the belt wears and stretches, it will be
necessary to move the belt adjuster pulley to main-
tain proper tension. To set belt tension, follow this
procedure:
1. Clear the area of bystanders, especially children.
2. Stop engine, shut off fuel supply lever, remove
ignition key (electric start models), disengage dri-
ves and wait for all moving parts to stop.
3. Engage the tub rotation drive control.
4. Check the tension of the belt by applying a small
force to the center of the belt span. It should
deflect from 1/2 to 1 inch (12 to 25 mm) in either
direction.
5. If the belt deflection is greater than 1 inch (25
mm), the idler should be adjusted to provide
more movement.
6. Turn the turnbuckle on the control lever to pro-
vide more movement on the idler pulley.
7. Recheck the belt tension. If the turnbuckle does
not provide sufficient adjustment to tighten the
belt, the belt will have to be replaced.
5.2.3.2 BELT REPLACEMENT
To replace the belt, follow this procedure:
1. Clear the area of bystanders, especially small
children.
2. Stop engine, shut off fuel supply lever, remove
ignition key (electric start models), disengage all
drives and wait for all moving parts to stop.
3. Loosen the bolts holding the rear tub guide
wheels.
4. Slide the tub guide wheels back in their slots.
IMPORTANT! NEVER LOOSEN
THE FRONT TUB GUIDE WHEELS!
5. Slide the belt down the lower edge of the tub and
raise the tub to slide the belt under it.
6. Slip the belt out from around the gearbox and the
tightener pulley.
7. Remove the bolt holding the grate height control
in position (fig. 24 on next page).
8. V-belt is now free and can be replaced.
9. Proceed backward to install a new belt.
10. Tighten the grate height control bolt.
11. Tighten the rear tub guide wheels.
12. Adjust the turnbuckle to provide the required belt
tension.
13. Check the belt tension after running for 10 hours.
Fig. 23
Tub guide wheels
Fig. 22
Turnbuckle
