RING 0965747 - Caterpillar

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.
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 initial valve lash adjustment on new engines, rebuilt engines, or remanufactured engines is recommended at the first scheduled oil change. The initial adjustment is necessary due to initial wear of the valve train components and seating of the valve train components.This maintenance is recommended by Caterpillar as part of a lubrication and preventative maintenance schedule in order to help provide maximum engine life.Reference: For more information on adjusting the engine valve lash, refer to Testing and Adjusting, "Engine Valve Lash - Inspect/Adjust"Adjustment of the Electronic Unit Injectors
Adjust the electronic unit injector preload at the same interval as the valve lash adjustment. The operation of Caterpillar engines with improper valve adjustment and with improper adjustments of the electronic unit injector can reduce engine efficiency. This reduced efficiency could result in excessive fuel usage and/or shortened engine component life.Reference: For more information on adjusting the electronic unit injectors, refer to Testing and Adjusting, "Electronic Unit Injectors - Adjust"