Drive Belt: Testing and Inspection

Checking Drive Belts

WARNING:Be sure to perform when the engine is stopped.

1. Inspect belts for cracks, fraying, wear and oil. If necessary, replace.





2. Inspect drive belt deflection or tension at a point on the belt midway between pulleys.

- Inspection should be done only when engine is cold, or over 30 minutes after engine is stopped.

- Measure belt tension with tension gauge (BT 3373-F or equivalent) at points marked V shown in the figure.

- When measuring deflection, apply 98 N (10 kg, 22 lb) at the V marked point.

- Adjust if belt deflection exceeds the limit or if belt tension is not within specifications.

CAUTION:

- When checking belt deflection or tension immediately after installation, first adjust it to the specified value. Then, after turning the crankshaft two turns or more, re-adjust to the specified value to avoid vanation in deflection between pulleys.

- Tighten idler pulley lock nut by hand and measure deflection or tension without looseness.

CAUTION:

- When belt is replaced with a new one, adjust it to value for "New belt" to accommodate for insufficient adaptability with pulley grooves.

- When deflection or tension of belt being used exceeds "Used belt limit", adjust it to value for "Used belt".

- When checking belt deflection or tension immediately after installation, first adjust it to the specified value. Then, after turning the crankshaft two turns or more, re-adjust to the specified value to avoid variation in deflection between pulleys.

- When installing belt, make sure that it is correctly engaged with pulley groove.

- Keep oil and water away from belt.

- Do not twist or bend belt excessively.