ADJUSTER GP-SEAT 1162779 - Caterpillar

If the measurement is not within this range adjustment is necessary. See Testing And Adjusting, "Valve Lash And Valve Bridge Adjustment".Valve Lash and Valve Bridge Adjustment
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Cylinder and valve location (A) Inlet (B) Exhaust
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Table 6
Valve Lash    
Valves     Dimension of Gauge    
Inlet    
0.38 mm (0.015 inch)    
Exhaust    
0.76 mm (0.030 inch)    Adjust the valve lash while the engine is stopped. Use the following procedure in order to adjust the valves:
Put the No. 1 piston at the top center position.Note: If the engine is equipped with an engine compression brake, loosen the adjusting screw for the slave piston lash prior to adjusting the engine valve lash. Refer to the Testing and Adjusting, "Compression Brake" topic in order to adjust the slave piston lash.Note: See Testing and Adjusting, "Finding Top Center Position for No. 1 Piston" for further details.
With No. 1 piston at the top center position of the compression stroke, an adjustment can be made to the valves.Before any adjustments are made, lightly tap each rocker arm at the top of the adjustment screw. Use a soft mallet to ensure that the lifter roller seats against the camshaft's base circle.
Make an adjustment to the valve lash on the inlet valves for cylinders 1, 2, and 4.
Loosen the valve adjustment locknut (3) .
Place the appropriate feeler gauge (5) between the inlet rocker arm and the inlet valve bridge. Turn the inlet adjustment screw (4) while the valve adjustment locknut (3) is being held from