Belts - Inspect/Adjust/Replace - Perkins 4008-30 Operation And Maintenance Manual

66
Maintenance Section

Belts - Inspect/Adjust/Replace

8. Install guards (1) and restore electrical power to
the engine.
Replace
Refer to "Disassembly and Assembly Manual"V-Belts
(Fan Drive V-Belts) - Remove and Install for more
information.

Belts - Inspect/Adjust/Replace

(Alternator Belt)
Inspection
1. Isolate the electrical supply to the engine.
Illustration 43
Typical example
2. Loosen the bolts (1) and (3). Remove the guard (2)
from alternator (4). If necessary, loosen the bolts
(5) and (7) remove lower guard (6).
3. Inspect the belt (10) for cracks. Inspect the belt for
contamination. If necessary, replace the belt.
Refer to "Replacement" for more information.
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Illustration 44
4. Apply 4.3 to 8.7 N (1 to 1.9 lb) of pressure at point
(X).
The total deflection should not exceed 2.75 mm
(0.10 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
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1. Ensure that the electrical supply to the engine is
isolated. Remove the guards, refer to "Inspection"
for more information.
SEBU9077-02
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