Mitsubishi — Inspecting V-belt and adjusting belt tension
Adjustments
From a Mitsubishi owner's manual — check it applies to your exact model before use.
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Before you start
- If defects such as cuts or surface separations are found, replace the V-belt.
- Keep oil and grease away from the belt.
- Excessive V-belt tension can cause rapid wear of the alternator bearing.
Procedure
- Inspect V-belt for defects such as wear, cuts or surface separations; replace if defective.
- Push the belt downward with 49 ± 5 N force midway between pulleys.
- Compare deflection with 7 ± 1 mm for new belt and 9 ± 1 mm for retightening.
- Loosen all retaining bolts of the applicable tension pulley bracket.
- Loosen the lock nuts of the adjusting bolt.
- Turn the adjusting bolts to adjust belt tension.
- Tighten the lock nut of the adjusting bolt.
- Tighten all the retaining bolts of the bracket.
Specs & values
- Deflection 7 ± 1 mm [0.28 ± 0.04 in.] new belt; 9 ± 1 mm [0.35 ± 0.04 in.] retightening at 49 ± 5 N [5 ± 0.5 kgf]
Source: Mitsubishi owner's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.