the belt until the desired belt tension is attained
(Figure 31).
Important:
Do not over tension the belt.
B. Tighten the nut to lock the adjustment.
4. Install the belt cover by placing it in position.
5. While maintaining a slight gap between the cover
seal and the side plate, install each mounting bolt
until the threads engage in the insert. The gap allows
visual alignment of the bolts to the threaded inserts.
6. After all bolts are installed, tighten them until the
stand-offs inside the cover contact the side plate. Do
not overtighten.
Adjusting the Differential Belt
1. Remove the bolts securing the front and rear sections
of the differential cover to the differential housing
and slide the cover sections away to expose the belt.
2. Check the tension by pressing the belt at mid span
of the pulleys (Figure 32) with 5 to 6 lb of force. The
belt should deflect 1/4 inch.
Figure 32
1.
Differential belt
2.
Idler pulley
3. Complete the following to adjust the belt tension:
A. Loosen the idler pulley mounting nut and pivot
the idler pulley clockwise against the backside of
the belt until the desired belt tension is attained
(Figure 32).
Important:
Do not over tension the belt.
B. Tighten the nut to lock the adjustment.
4. Install the belt cover by placing it in position.
5. While maintaining a slight gap between the cover
seal and the side plate, install each mounting bolt
until the threads engage in the insert. The gap allows
visual alignment of the bolts to the threaded inserts.
6. After all bolts are installed, tighten them until the
stand-offs inside the cover contact the side plate. Do
not overtighten.
Adjusting the Primary V-Belts
1. To adjust the belt tension on primary V-belts, first
check the adjustment of the traction control. Refer
to Adjusting the Traction Control. If unable to attain
the 4 to 5 lb force required in adjusting the traction
control, proceed to next step.
2. Loosen the retainer securing the V-belt cover and
pivot the cover open (Figure 33).
Figure 33
1.
V-belt cover
2.
Retainer
3. To increase belt tension, loosen the engine mounting
bolts and move engine backwards in the slots.
Important:
Do not over tension the belt.
4. Tighten the mounting bolts.
Note:
The distance between the centers of the
driver and the driven pulleys should be approximately
5.18 inches (13.15 cm) after new V-belts are installed.
5. After tensioning the primary V-belts, check the
alignment of the engine output shaft pulley and the
countershaft pulley with a straight edge.
6. If the pulleys are misaligned, loosen the screws
securing the engine mounting base to the mower
frame and slide the engine from side to side until the
pulleys are aligned within 0.030 inch (0.07 cm).
27
