3056E Industrial Engine Caterpillar

Assembly Procedure

Note: Ensure that all of the oil holes in the rocker shaft and in the rocker arms are not plugged before you begin the assembly procedure.

1. Lubricate all of the components with clean engine oil before assembly.
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   Illustration 1	g00937843

2. Position oil supply tube (12) on the rocker shaft assembly (1). Install bolt (11) in the top of oil supply tube and into oil passage (A) on rocker shaft assembly (1). Install shims (10) on rocker shaft assembly (1). Install springs (9) on the rocker shaft assembly.

   Note: The clearance between the rocker arm bushing and the rocker shaft is 0.03 to 0.09 mm (0.001 to 0.004 inch).

3. If necessary, Install a new bushing (5) in rocker arm assembly (4) for the inlet valve. Install a new bushing (5) in rocker arm assembly (7) for the exhaust valve.

   Note: Assemble the rocker arm shaft for the inlet valves and the rocker arm shaft for the exhaust valves in the correct order.

   Note: There is an arrow on shaft bracket (6). This arrow must be positioned up when the shaft bracket is installed on the rocker shaft assembly.

4. Install rocker arm assembly (4) for the inlet valve on rocker shaft assembly (1). Install shaft bracket (6) and rocker arm assembly (7) for the exhaust valve on rocker shaft assembly (1).

5. Install spring (8) on rocker shaft assembly (1).

6. Repeat Step 3 through Step 5 in order to completely assemble the rocker shaft assembly (1).
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   Improper assembly of parts that are spring loaded can cause bodily injury. To prevent possible injury, follow the established assembly procedure and wear protective equipment.

7. Install washer (3) and retaining ring (2) on the rocker shaft assembly (1).

End By:

1. Install the rocker shaft assembly. Refer to Disassembly and Assembly, "Rocker Shaft and Pushrod - Install".