Caterpillar 3406 — Engine Valve Lash Check/Adjust
Adjustments · Valve Train
For the Caterpillar 3406, from the Caterpillar owner's manual.
Applies to: Caterpillar 3406
Before you start
- Do not use starting motor to turn flywheel; hot components can burn
Procedure
- Disable starting motors so engine cannot start during procedure
- Allow at least 20 minutes for valves to cool to block/head temperature
- Clean area around valve mechanism covers before removal
- Adjust valve bridges before adjusting any valves, per cylinder
- Check/adjust valve lash to nominal value in Valve Lash Setting chart
- Start engine at LOW IDLE and observe valve rotator rotation after setting lash
Specs & values
- Refer to Service Manual for valve lash nominal values
Full service-parts list: Caterpillar 3406 →
Source: Caterpillar 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.