Caterpillar — Engine Valve Lash - Inspect/Adjust
Adjustments · valve train
From a Caterpillar owner's manual covering: 3306B, 3406, 3406E, 3412C, 3412C Generator Set, 3500 Series. Check it applies to your exact model before use.
Applies to: Caterpillar 3306B, Caterpillar 3406, Caterpillar 3406E, Caterpillar 3412C, Caterpillar 3412C engine
Before you start
- Hot engine components can cause burns.
- Only qualified service personnel should perform this maintenance.
Procedure
- Ensure the engine cannot be started; do not use the starting motor to turn the flywheel.
- Ensure the engine is stopped and allow valves to cool.
- Refer to the Systems Operation/Testing and Adjusting Manual for the complete procedure.
- Set inlet valve lash to 0.38 mm (0.0150 inch).
- Set exhaust valve lash to 0.76 mm (0.030 inch).
- Perform initial adjustment at the first scheduled oil change.
Specs & values
- Valve lash inlet 0.38 mm (0.0150 inch)
- Valve lash exhaust 0.76 mm (0.030 inch)
Full service-parts list: Caterpillar 3406 →, Caterpillar 3406E →, Caterpillar 3412C →, Caterpillar 3412C engine →
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.