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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. |
Initial wear and seating of valve train components require an initial valve lash adjustment. Initial valve lash adjustment for new engines and for rebuilt engines is scheduled at the First 500 Service Hours. “Engine Oil and Filter - Change” should also be performed at that time.
Subsequent valve lash checks and adjustments are scheduled for Every 4000 Service Hours.
Check the valve bridge before setting the valve lash. Ensure that the valve bridge is seated equally on both valve stems. Adjust the valve bridge before setting the valve lash.
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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. |
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Electrical shock hazard. The electronic unit injector system uses 90-120 volts. |
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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 engine block temperature. |
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| Illustration 1 | g02819956 |
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(A) Inlet Valves
(B) Exhaust Valves | |
An adjustment is not required if the valve clearance settings are within
| VALVE CLEARANCE SETTING CHART | |
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| Inlet Valve | |
| Exhaust Valve | |
Refer to your machine Service Manual or your Cat dealer for the complete valve adjustment procedure.