Alternator Belt
1. Condition and Tension – Check condition and tension
of belts (Fig. 47) after every 100 operating hours.
A. Proper tension will allow 3/8 in. (10 mm) deflection
when a force of 10 lbs. is applied on the belt
midway between the pulleys.
B. If deflection is not 3/8 in. (10 mm), loosen alternator
mounting bolts. Increase or decrease alternator belt
tension and tighten bolts. Check deflection of belt
again to assure tension is correct.
2
Figure 47
1. Alternator
PTO Belt
To Check Tension:
1. Turn engine off and remove the ignition key. Set the
parking brake. Raise the engine hood and allow the
engine to cool.
2. Loosen the tensioning rod jam nut (Fig. 48).
3. Use a 1/2" wrench to tighten or loosen the belt
tensioning spring (Fig. 48). Adjust spring to a length of
2-7/8" (73 mm).
4. Tighten jam nut.
To Replace Belt:
1. Turn off the engine and remove the ignition key. Set the
parking brake. Raise the hood and allow the engine to
cool.
2. Loosen the tensioning rod jam nut (Fig. 48).
3. Using a 1/2" wrench, loosen the belt tensioning spring
(Fig. 48) all the way.
4. Rotate PTO pulley toward the engine and remove the
belt (Fig. NO TAG).
1
2. Mounting bolt
37
5. Install the new PTO belt and re–tension the pulley
spring to 2–7/8" (73 mm) (Fig. 48).
6. Tighten the jam nut (Fig. 48) and close the hood.
3
3
Figure 48
1. Tensioning spring
2. Tensioning rod jam nut
PTO Clutch Adjustment
The power take off electric clutch can be adjusted by
following the following procedure:
1. Turn engine off and remove the ignition key. Set the
parking brake. Raise the engine hood and allow the
engine to cool.
2. Remove bolt, washer and nut securing nylon block and
remove nylon block (Fig. 49).
Figure 49
1. Clutch
2. .015" air gap (3)
3. Adjusting nut (3)
2
2–7/8" (73 mm)
3. Tension adjusting bolt
4. Nylon block
5. Electrical connector
6. PTO Belt