C3.4B Engines for Caterpillar Built Machines Caterpillar


Position the Valve Mechanism Before Maintenance Procedures

Usage:

CCS7 4B2


NOTICE

Ensure that this procedure is carried out before the rocker shaft is removed.


Table 1
Required Tools 
Tool  Part Number  Part Description  Qty 
A(1)  5P-7306  Housing 
5P-7305 Engine Turning Tool 
(1) This Tool is used in the aperture for the electric starting motor.


Illustration 1g03692044
Cylinder and valve location
(A) Exhaust valves
(B) Inlet valves

  1. Remove the valve mechanism cover. Refer to Disassembly and Assembly, "Valve Mechanism Cover - Remove and Install" for the correct procedure.


    Illustration 2g03698915
    Typical example

  2. Select an exhaust rocker arm (1). The exhaust rocker arm (1) can be on any cylinder.

  3. Use Tooling (A) to rotate the crankshaft in the normal direction of rotation until the hydraulic lash adjuster starts to open the exhaust valve. Continue to rotate the crankshaft until the valve has opened to the maximum extent. This is the safe position.

    Note: Make temporary marks on the front pulley and the front housing once the engine is in the safe position.


NOTICE

Ensure that the crankshaft is located in the safe position before the rocker shaft assembly is installed.


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