C9.3 Tier 4 Final Engines Valve Mechanism Caterpillar


Valve Mechanism
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Illustration 1g06345548

Table 1
Item  Qty  Part  Specification Description 
12  260-7524 Valve Adjustment Screw  The free running torque must not exceed 0.4 N·m (3.5 lb in)
12  2Y-5829 Nut  Torque to 7 ± 3 N·m (62 ± 27 lb in)
12  453-5998 Valve Lifter As  Before installation, lubricate the bore in the cylinder block for the valve lifter assembly with the 50/50 mixture of clean engine oil and Loctite LB 8028 camshaft lube. 
Dimension for the valve lash setting, the engine must be stopped and the engine must be cold:
Inlet valve is 0.38 ± 0.08 mm (0.015 ± 0.003 inch).
Outlet valve is 0.64 ± 0.08 mm (0.025 ± 0.003 inch)


Illustration 2g06345551
Right side view
Numerical sequence

Table 2
Item  Qty  Part  Specification Description 
8T-0646 Bolt  Tighten the bolts in a numerical sequence as shown in Illustration 2 to standard torque. 
163-2459 Spring  Length under the test force is 14.50 mm (0.571 inch).
Test force is 65.0 ± 3.5 N (14.6 ± 0.8 lb).
Approximate free length after test is 30.75 mm (1.211 inch)


Illustration 3g01585816
547-4475 Rocker Shaft Assembly

Table 3
Item  Qty  Part  Specification Description 
Diameter of the rocker arm shaft is 28.000 ± 0.013 mm (1.1024 ± 0.0005 inch)
Installation depth of the cup plug is 1.25 ± 0.25 mm (0.049 ± 0.010 inch)

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