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Ensure that the engine cannot be started while this maintenance is being performed. To help prevent possible injury, do not use the starting motor to turn the flywheel. Hot engine components can cause burns. Allow additional time for the engine to cool before measuring/adjusting valve lash clearance. |
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Only qualified service personnel should perform this maintenance. Refer to the Systems Operation/Testing and Adjusting Manual, "Valve Lash and Valve Bridge Adjustment" article or consult your Caterpillar dealer for the complete valve lash adjustment procedure. Operation of Caterpillar engines with improper valve adjustments can reduce engine efficiency. This reduced efficiency could result in excessive fuel usage and/or shortened engine component life. |
The adjustment is necessary due to the initial wear of the valve train components and to the seating of the valve train components.
This maintenance is recommended by Caterpillar as part of a lubrication and preventive maintenance schedule to help provide maximum engine life.
Ensure that the engine is stopped before you measure the valve lash. To obtain an accurate measurement, allow the valves to cool before you perform this maintenance.
Remove the cover to access the rear of the engine. Check the valve lash. For the correct adjustment procedure, refer to Systems Operation, Testing and Adjusting, "Engine Valve Lash - Inspect/Adjust".