LM 287 User Manual – 30.10.2023
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6.10.2 Alternator belt tension check/adjustment (12)
To maximize the engine performance, inspect the belt for wear and cracking. Replace a belt that is worn or damaged.
See
If the belt is too loose, vibration causes unnecessary wear on the belt and pulleys. A loose belt may slip enough to cause
overheating.
The correct tension for a new belt is 400 N (90 lb) to 489 N (110 lb). The correct tension for a used belt that has been in
operation for 30 minutes or more at the rated speed is 267 N (60 lb) to 356 N (80 lb).
The belt tension should be checked at the center point of the belt between the pulleys.
Figure 90
To adjust alternator belt:
► Loosen bolt (1) and bolt (3).
► Loosen nut and bolt (4).
► Move the alternator (2) in order to adjust the belt (4) to the required tension.
► Tighten bolt (1) and bolt (3) to a torque of 22 Nm (194 lb in). Tighten nut and bolt (4) to a torque of 22 Nm (194 lb in).
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