Centinel System – Repair Manual – 002-024   Overhead Camshaft, Valve

Remove the upper gear cover. Refer to Procedure 001-079.

Remove the rocker lever cover. Refer to Procedure 003-011.

Disconnect the engine brake wiring harness. Refer to Procedure 020-015.

Remove the rocker lever shafts. Refer to Procedure 003-009.

Remove the valve camshaft gear. Refer to Procedure 001-088.

Remove the retainer capscrews, retainer, seal, and o-ring.

Discard the seal and o-ring.

CAUTION  Use caution when removing the camshaft to avoid damaging the camshaft bushings.

Remove the valve camshaft.

WARNING  When using solvents, acids, or alkaline materials for cleaning, follow the manufacturer’s recommendations for use. Wear goggles and protective clothing to reduce the possibility of personal injury.

WARNING  Wear appropriate eye and face protection when using compressed air. Flying debris and dirt can cause personal injury.

Clean the valve camshaft and the bore of the valve camshaft gear with Envirosol 655 solvent, or equivalent, and a lint-free cloth.

Check the valve camshaft and valve camshaft gear for fretting damage.

The valve camshaft and valve camshaft gear must be replaced if damaged.

Measure the outside diameter of the seven valve camshaft bearing journals.

If the camshaft journals are not within specifications, the camshaft must be replaced.

Inspect the camshaft lobes for cracks, scratches, and other damage. Refer to Camshaft Reuse Guidelines for Cummins® Engines with Roller Followers or Roller Tappets, Bulletin 3666052, for further reuse guidelines.

CAUTION  Use caution when installing the camshaft to avoid damaging the camshaft bushings.

Coat the inside of the valve camshaft bushings with Lubriplate™ prior to installing camshaft.

Install the valve camshaft.

Install new o-rings onto the retainer plate.

Install the retainer plate and capscrews.

Tighten the capscrews.

Install the valve camshaft gear. Refer to Procedure 001-088.

Install the rocker lever shafts. Refer to Procedure 003-009.

Connect the engine brake wiring harness. Refer to Procedure 020-015.

Install the rocker lever cover. Refer to Procedure 003-011.

Install the upper gear cover. Refer to Procedure 001-079.

Operate the engine until it reaches normal operating temperature and check for leaks.