ROTATING GP-PUMP 1559135 - Caterpillar

You must read and understand the warnings and instructions contained in the Safety section of this manual before performing any operation or maintenance procedures.Engine Valve Lash
Check and Adjust
Initial valve lash adjustment on new, or rebuilt engines is recommended at the first normally scheduled oil change interval due to initial wear and seating of valve train components. Subsequent adjustments should be made at every 2000 service hour intervals.
To prevent possible injury, do not use the starter motor to turn the flywheel.Hot engine components can cause burns. Allow additional time for the engine to cool before measuring valve clearance.
Measure the valve lash with the engine stopped. To obtain an accurate measurement, allow at least 20 minutes for the valves to cool to engine cylinder head and block temperature.
Set the clearance to the nominal clearance given in the "Valve Clearance Setting" chart shown. Operation of Caterpillar engines with improper valve adjustments will reduce engine efficiency. This reduced efficiency could result in excessive fuel usage and/or shortened engine component life.Bridge Adjustment
The valve bridge should be checked and/or adjusted each time valve clearance is checked and/or adjusted. Valve and valve mechanism components do not always wear evenly which can allow the bridge to go out of adjustment.It is not necessary to remove the rocker arm shaft to adjust the valve bridges, but there must be lash. Push on the top of the rocker arm directly above the center of the bridge to check bridge adjustment. Refer to the Service Manual for the complete adjustment procedure.Vibration Damper and Engine Mounts
Inspect/Check Vibration Damper
Damage to or failure of the damper will increase vibrations and result in damage to the crankshaft and other engine components. A failing vibration damper will cause more gear train noise at variable points in the speed range.Inspect/Check Engine Mounts
Caterpillar recommends checking the engine mounts for deterioration and proper bolt torque. This will prevent excessive engine vibration caused from improper mounting. See the Marine Engine Application and Installation Guide LEBM2239 for more information.