KIT-CONNECTING PLUG 1552271 - Caterpillar

Illustration 1 g01246863
(1) Rocker arm (4) Camshaft (6) Valve bridge (2) Torque for the adjustment nuts ... 30 7 N m (22 5 lb ft) (3) Rocker shaft Diameter of a new rocker shaft ... 40.000 0.010 mm (1.5748 0.0004 inch) Bore in the rocker arm for rocker shaft ... 40.065 0.015 mm (1.5774 0.0006 inch) Maximum dimension for the bore of the rocker arm for the rocker arm shaft ... 40.193 mm (1.5824 inch)Note: For engines that are equipped with variable valve actuators, refer to Specifications, "Variable valve Actuator" for information on installation of the rocker arm assembly.Note: For engines that are equipped with CAT Compression Brakes, refer to Specifications, "CAT Compression Brake" for the correct procedure on installation of the rocker arm assembly. (5) Location for checking the valve lash Inlet valves ... 0.38 0.08 mm (0.015 0.003 inch) Exhaust valves ... 0.76 0.08 mm (0.030 0.003 inch)Note: Refer to Testing and Adjusting, "Engine Valve Lash - Inspect/Adjust" for the correct procedure on setting the engine valve lash.
Illustration 2 g01568479
Top view of valve mechanism group
Illustration 3 g01568481
Tightening sequenceUse the following procedure to tighten the bolts (6) for the rocker arm that is shown in Illustration 3:
Tighten the bolts for the rocker arm in the sequence 2, 3, 1, 4 to 50 5 N m (37 4 lb ft).
Again tighten the bolts for the rocker arm in the sequence 2, 3, 1, 4 to an additional angle of 45 5 degrees.