C15 On-highway Engines Caterpillar

Removal Procedure

Start By:

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

Note: Drain the coolant from the cooling system into a suitable container for storage or disposal.

Note: Check the tube assembly. The tube assembly should be properly drained in order to prevent injury or damage.

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Illustration 1	g01078734

1. Disconnect the harness assembly from variable valve actuator oil pressure sensor (8).

2. Disconnect the harness assembly from the oil pressure solenoid for variable valve actuator (9).

3. Disconnect harness assemblies (7) from the electronic unit injectors.

4. If necessary, remove tube assembly (4).

5. Disconnect tube assembly (6).

6. Disconnect harness assembly (1) from valve mechanism cover base (2).

7. Remove bolt (3).

8. Remove bolts (5). Remove valve mechanism cover base (2).
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   Illustration 2	g01078895

9. Remove seal (10) from valve mechanism cover base (2).

10. Remove bolts (12), harness assembly (11), and the connector seal from the valve mechanism cover base.

11. Remove bolts (13) and the clips for harness assembly (14). Remove the harness assembly from the valve mechanism cover base.

Installation Procedure

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Illustration 3	g01078895

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Illustration 4	g01472217

1. Apply Tooling (B) to the threads of bolts (13). Install bolts (13) and the clips for harness assembly (14). Install the harness assembly on the valve cover base.

   Note: Align the white mark on the harness assembly with the connecting points. Tie the strap to the connecting points. Ensure that no moving parts contact the harness assembly.

2. Install the connector seal and harness assembly (11) to the valve cover base. Install bolts (12).

   Note: Install the connector seal with the curved part of the seal against the valve cover base.

3. Install seal (10) in valve mechanism cover base (2). Apply Tooling (A) to the seal joint.
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   Illustration 5	g01078734

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   Illustration 6	g01078899
   Tightening sequence

4. Put valve mechanism cover base (2) in position on the cylinder head. Install bolts (5) and tighten to a torque of 18 ± 3 N·m (13 ± 2 lb ft) in the numerical sequence that is shown in Illustration 6.

5. Install bolt (3).

6. Connect harness assembly (1).

7. Install tube assembly (4).

8. Connect tube assembly (6).

9. Position harness assembly (7) in position on the electronic unit injector. Tighten the cap nuts to a torque of 2.5 ± 0.25 N·m (22 ± 2 lb in).

10. Connect the harness assembly to variable valve actuator oil pressure sensor (8).

11. Connect the harness assembly to the oil pressure solenoid for variable valve actuator (9).

End By:

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