Yanmar 4TNE88 — Checking the V-belt tension
Maintenance
For the Yanmar 4TNE88, from the Yanmar service manual.
Applies to: Yanmar 4TNE88, Yanmar TNE series engine
Procedure
- Push the center of the V-belt between the alternator and cooling water pump with a finger.
- If deflection is 10-15 mm, the V-belt tension is acceptable.
- If not, adjust the tension using the adjuster at the alternator.
Specs & values
- Deflection 10~15 mm
Full service-parts list: Yanmar 4TNE88 →
Source: Yanmar service 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.