LINK,MASTR L 0944837 - Caterpillar

Engine Valve Clearance Setting
Adjust
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 clearance 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.
Adjust the valve clearance to within 0.08 mm (.003 in) of the valve clearance setting given in the chart. Refer to your machine's Service Manual or contact your Caterpillar dealer for the complete valve adjustment procedure.Engine Valve Rotators
Inspect
When inspecting the valve rotators, protective glasses or face shield and protective clothing must be worn, to prevent being burned by hot oil spray.
1. Start the engine and run at LOW IDLE. 2. Watch the top surface on each valve rotator. Each valve rotator should turn slightly each time the valve closes.If a valve fails to rotate, contact your Caterpillar dealer.Engine Mounts and Crankshaft Vibration Damper
Inspect - Check
Damage to, or failure of, the damper will increase torsional vibrations and result in damage to the crankshaft and other engine components. A deteriorating vibration damper will cause excessive gear train noise at variable points in the speed range.The vibration damper weight is located inside a fluid filled case. The weight moves in the case to limit torsional vibration. Inspect the dampers for evidence of dents, cracks or leaks of the fluid.Caterpillar recommends that checking the engine mounts for deterioration and proper bolt torque. This will prevent excessive engine vibration caused from improper mounting.Cooling System
Add Extender if using Long Life Coolant/Antifreeze
For engines using Caterpillar Long Life Coolant/Antifreeze, Extender must be added every 3000 hours or 2 years. Refer to the table that to add the recommended amount of Extender to your cooling system. With the exception of adding the Extender and maintaining your coolant level, no other maintenance is required. For more information on adding Extender to your cooling system, refer to the Cooling System Specifications or contact your Caterpillar dealer/