Centinel System – Repair Manual – 003-009   Rocker Lever Assembly

Install the adjusting screw and locknut into each rocker lever. Do not tighten the locknuts.

Install the injector rocker levers on the shaft.

Install the exhaust (1), intake (2), and engine brake (3) rocker levers onto the shaft.

WARNING  Clear the rocker lever assembly mounting capscrew holes of oil and debris. Extensive engine damage can result if this warning instruction is not followed.

Install the valve crossheads.

Position the valve/brake rocker lever assemblies onto the cylinder head.

CAUTION  To reduce the possibility of valve rocker shaft damage due to inadequate brake rocker lever running clearance, follow the specified procedure to seat the valve rocker shafts on the cylinder head pedestals (1).

Each valve rocker shaft must be seated in the cylinder head pedestals prior to tightening the rocker shaft capscrews.

The front and rear rocker lever shaft assemblies will seat separately as the engine is rotated in the clockwise direction.

Use the compressor drive or barring device to bar the engine over in the direction of rotation, clockwise as viewed from the front of the engine.

Align the A mark on the vibration damper with the timing mark on the gear cover.

Either the front or the rear rocker shaft assembly will be fully seated on the cylinder head pedestals at this point.

Check the position of the front and rear valve rocker shaft assemblies to determine which one is fully seated.

Lubricate the capscrews of the fully seated rocker shaft with clean 15W-40 oil.

CAUTION  To reduce the possibility of valve rocker shaft damage because of inadequate brake rocker lever running clearance, follow the specified capscrew torque procedure. The valve rocker lever shaft has a machined flat on the front of the shaft to provide proper brake rocker lever position. Therefore, the front rocker shaft capscrew (1) must be tightened first to control brake rocker lever position. Brake lever running clearance must always be checked after valve rocker lever shaft installation.

Check the brake running clearance. Refer to Procedure 003-004.

Tighten the front mounting capscrew for the fully seated valve rocker lever shaft to the initial torque value to locate the shaft.

Tighten all the capscrews to the final torque value using the torque plus angle method. Tighten the capscrews from the center out.

Use the compressor drive or barring device to bar the engine over in the direction of rotation, clockwise as viewed from the front of the engine.

Align the B mark on the vibration damper with the timing mark on the gear cover.

The remaining rocker shaft will be fully seated at this point.

Lubricate the capscrews of the fully seated rocker shaft with clean 15W-40 oil.

CAUTION  To reduce the possibility of valve rocker shaft damage because of inadequate brake rocker lever running clearance, follow the specified capscrew torque procedure. The valve rocker lever shaft has a machined flat on the front of the shaft to provide proper brake rocker lever position. Therefore, the front rocker shaft capscrew must be tightened first to control brake rocker lever position. Brake lever running clearance must always be checked after valve rocker lever shaft installation.

Check the brake running clearance. Refer to Procedure 003-004.

Tighten the front mounting capscrew for the remaining valve rocker lever shaft to the initial torque value to locate the shaft.

Tighten all the capscrews to the final torque value using the torque plus angle method. Tighten the capscrews from the center out.

Position the injector rocker lever assemblies onto the cylinder head.

Lubricate the injector rocker lever shaft capscrews with clean 15W-40 oil. Install the capscrews and washers.

Tighten all the mounting capscrews.

Loosen capscrews one at a time 360° and tighten again, using the torque-plus-angle method. Tighten capscrews from center out.

Adjust the valve, injectors, and brake.

Refer to Procedure .