PLATE 1119265 - Caterpillar

This engine uses high voltage to the unit fuel injectors.Disconnect injector enable circuit connector to prevent personal injury.Do not come in contact with the injector terminals while the engine is running.
Note: Valve lash is measured between the rocker arm and the valve bridge. All measurements and adjustments must be made while the engine is stopped and while the valves are fully closed.Valve Lash Check
An adjustment is NOT NECESSARY if the measurement of the valve lash is in the acceptable range in Table 4.
Table 4
Valve Lash Check with Engine Stopped    
Inlet    
0.30 to 0.46 mm (0.012 to 0.018 inch)    
Exhaust    
0.56 to 0.72 mm (0.022 to 0.028 inch)    If the measurement is not within this range, an adjustment is necessary. Refer to "Valve Lash Adjustment" for the proper procedure.Valve Lash Adjustment
Table 5
Valve Lash Setting with Engine Stopped    
Inlet    
0.38 mm (0.015 inch)    
Exhaust    
0.64 mm (0.025 inch)    
Illustration 4 g00386924
Cylinder and valve location (A) Exhaust valves (B) Inlet valvesUse the following procedure to adjust the valve lash:
Put the No. 1 piston at the top center position on the compression stroke. Refer to the Testing and Adjusting, "Fuel System" topic for the proper procedure.
Illustration 5 g00481639
Adjustment of the inlet valve (1) Inlet rocker arm (2) Adjustment locknut
Adjust the valve lash on the inlet valves for cylinders 1, 2, and 4.
Lightly tap the rocker arm at the top of the adjustment screw with a soft mallet. This will ensure that the lifter roller seats against the camshaft's base circle.
Loosen adjustment locknut (2) .
Place the appropriate feeler gauge between inlet rocker arm (1) and the inlet valve bridge. Then, turn the adjustment screw in a clockwise direction. Slide the feeler gauge between the rocker arm and the valve bridge. Continue turning the adjustment screw until a slight drag is felt on the feeler gauge. Remove the feeler gauge.
Tighten adjustment locknut (2) to a torque of 25 7 N m (18 5 lb ft). Do not allow the adjustment screw to turn while you are tightening the adjustment locknut. Recheck the valve lash