C7.1 Marine Propulsion Engine Caterpillar

Removal Procedure

Reference: Special Instruction, "Visual Service Procedures - Colors and Symbols" , M0066576.

Start By:

1. Remove the valve mechanism cover.

Note: Either Tooling (A) can be used. Use the Tooling that is most suitable.

Illustration 1	g06273216
Use Tooling (A) to rotate the crankshaft so that number one piston is at top dead center on the compression stroke. Refer to System Operation, Testing and Adjusting, "Position the Valve Mechanism Before Maintenance Procedures" for the correct procedure.

Illustration 2	g06273217
Use the tooling to lock the crankshaft.

Illustration 3	g06273218
Use Tooling (A) to rotate the crankshaft in a clockwise direction and position the crankshaft at 60 degrees after top dead center.

Illustration 4	g06273219
Ensure that all threaded inserts are fully unscrewed.

Illustration 5	g06273220
To avoid distortion of the rocker shaft assembly, each Torx screw should be loosened by half a turn at one time. Repeat the procedure until all Torx screws are loosened.

Illustration 6	g06273221

Illustration 7	g06273222
Identification will ensure that the pushrods can be reinstalled in the original positions. Do not interchange the positions of used pushrods.

Illustration 8	g06273223
Identification will ensure that the valve bridges can be reinstalled in the original location and the original orientation. Do not interchange the location or the orientation of used valve bridges.