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64
Maintenance Section
Belts - Inspect/Adjust/Replace
5. Ensure that the electrical supply to the engine is
isolated. Install the guards.
Replacement
Note: Fan drive belts must be replaced as a set. Do
not replace individual belts.
Removal of the Fan Drive Belts
Illustration 40
Typical example
1. Ensure that the electrical supply to the engine is
isolated. As required, remove the guards.
2. Loosen bolts (5) and loosen the locknut (4).
3. Rotate the rod (3) until the pulley (2) is toward the
center of the engine.
4. Remove the belts (1).
Installation of the Fan Drive Belts
1. Install new belts (1) over the pulleys.
2. Rotate the rod (3) to achieve an initial tension of
77 N (17 lb). The total deflection should not
exceed 16 mm (0.63 inch).
3. Tighten the locknut (4) to a torque of 120 N·m
(88.5 lb ft). Tighten bolts (5) securely.
4. Rotate the pulleys for the fan drive belts three to
four revolutions to ensure that the fan drive belts
are correctly installed. Ensure that the tension is
still 77 N (17 lb).
5. Restore the electrical supply to the engine. Install
the guards.
6. Operate the engine for 15 to 20 minutes. Refer to
Operation and Maintenance Manual, "Starting the
Engine" for the correct procedure.
7. Stop the engine. Refer to Operation and
Maintenance Manual, "Stopping the Engine" for
the correct procedure.
8. Isolate the electrical supply to the engine. Remove
the guards.
9. Loosen bolts (5) and loosen the locknut (4).
10. Rotate the rod (3) to achieve a final tension of
62 N (14 lb). The total deflection should not
exceed 16 mm (0.63 inch).
11. Tighten the locknut (4) to a torque of 120 N·m
(88.5 lb ft). Tighten bolts (5) securely.
12. Restore the electrical supply to the engine. Install
the guards.
Belts - Inspect/Adjust/Replace
(4006-23 Engine Only)
Inspect
g06021378
To maximize the engine performance, inspect the
belts for wear and for cracking. Replace belts that are
worn or damaged.
To check accurately the belt tension, a suitable
gauge should be used.
1. Isolate the electrical supply to the engine.
SEBU9077-02
i06683207
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