Perkins 4006-23 Operation And Maintenance Manual page 57

SEBU9077-01
Illustration 40
4. Apply 15.6 N (3.5 lb) of pressure at point (X).
The total deflection should not exceed 1.5 mm
(0.06 inch).
Replace the belt if the total deflection exceeds
1.5 mm (0.06 inch). Refer to "Replacement" for
more information.
5. Install the guard (3) and tighten bolts (1) and (3)
securely. If necessary, install lower guard (6) and
tighten bolts (5) and (7) securely.
6. Restore the electrical supply to the engine.
Adjustment
The alternator belt is a toothed belt. The belt tension
is not adjustable. The belt does not require a preload.
Light tension will ensure that the belt is a snug fit on
the pulleys.
Replacement
Removal of the Alternator Belt
1. Ensure that the electrical supply to the engine is
isolated. Remove the guards, refer to "Inspection"
for more information.
g01239310
Illustration 41
Typical example
2. Remove bolt (11) and loosen bolt (12).
3. Loosen bolt (8) and push the alternator (9) toward
the engine.
4. Remove the old belt.
Installation of the Alternator Belt
1. Install new belt (10) over the pulleys.
Note: Ensure that the teeth on the belt are engaged
with the teeth on the pulleys.
2. Pull the alternator (9) away from the engine. Install
bolt (11).
3. Tighten bolt (8). Tighten bolts (11) and (12)
securely.
4. Check the tension of the belt. Refer to "Inspection"
for the correct procedure.
57
Maintenance Section
Alternator Belt
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