Yanmar 4TNE88 — Checking the piston cooling nozzle
Maintenance
For the Yanmar 4TNE88, from the Yanmar service manual.
Applies to: Yanmar 4TNE88, Yanmar TNE series engine
Procedure
- Check the nozzle hole at the tip end for clogging with dirt or foreign matter and clean it.
- Check the brazed portion of the steel pipe for loosening or freeing by vibration.
- Replace with a new part if defective.
Specs & values
- Jet flow rate 4.3 l/min; jetting pressure 3.5 kg/cm2; nozzle hole dia. 1.77 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.