C7.1 Marine Propulsion Engine Caterpillar

Rocker Arm and Shaft - Install

Usage:

C7.1 GJN

Installation Procedure

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

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Table 1
Required Tools
Tool	Part Number	Part Description	Qty
A⁽¹⁾	9U-6198	Crankshaft Turning Tool	1
A⁽²⁾	9U-7336	Housing	1
A⁽²⁾	5P-7305	Engine Turning Tool	1
B	367-8608	Engine Timing Pin	1
C	298-5564	T40 Torx Socket	1
D	227-4389	E10 Torx Socket	1
E	370-4657	Rocker Arm Spacer	6
F	322-4113	Retainers	24

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⁽¹⁾	The Crankshaft Turning Tool is used on the front pulley.
⁽²⁾	This Tool is used in the aperture for the electric starting motor.

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

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NOTICE

Keep all parts clean from contaminants. Contaminants may cause rapid wear and shortened component life.

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Illustration 1	g06273224
Lubricate the valve bridges with clean engine oil.

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NOTICE

Failure to ensure that ALL valve bridges are correctly seated onto the valve stems will cause interference between the pistons and the valves, resulting in damage to the engine.

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Illustration 2	g06273225
Lubricate the pushrods with clean engine oil. Ensure that when the pushrods are installed into the hydraulic lift there should be a noticeable snap when the pushrods are correctly installed.

If necessary, 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.

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Illustration 3	g06273226
Use the tooling to lock the crankshaft.

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Illustration 4	g06273227
Use Tooling (A) to rotate the crankshaft in a clockwise direction and position the crankshaft at 60 degrees after top dead center.

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Illustration 5	g06273228

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Illustration 6	g06273229

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Illustration 7	g06273230
Tightening sequence for the screws.

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Illustration 8	g06273231

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NOTICE

Damage to the engine will occur if all threaded inserts are not fully unscrewed.

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Illustration 9	g06273232

Note: When the threaded insert is tightened, the threaded insert must seat correctly into the cup for the pushrod.

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Illustration 10	g06273233
The engine should not be operated for a period 30 minutes after the threaded inserts on all the rocker arms have been tightened. This period will allow the force of the valve springs to purge off excessive engine oil from the hydraulic lifters.