Cummins N14 STC, Celect, Celect Plus – Service Manual 001-009   Camshaft Bearing Support

Install the support bearing into the bore of the gear cover. Do not install the o-ring onto the support at this time.

Push the support against the camshaft so the camshaft gear rests against the camshaft thrust washer.

Hold the support against the camshaft, and use a feeler gauge to measure the space between the gear cover flange and the support bearing.

The clearance between the bearing support thrust face and the camshaft gear must be 0.20 to 0.33 mm [0.008 to 0.013 in].

After measuring the space between the bearing support and the gear cover flange, add an additional 0.20 to 0.33 mm [0.008 to 0.013 in] to that number to determine the thickness of the shims required. Example: Space of 1.52 mm [0.060 in], measured with a feeler gauge, plus 0.25 mm [0.010 in] for clearance will require 1.77 mm [0.070 in] shims.

Use a micrometer to measure the shims removed from the support at the time of disassembly. Add or remove shims as required to obtain the correct clearance between the bearing support and the camshaft gear. Shims are available in the following thicknesses:

Install the required number of shims and a new o-ring on the support bearing.

CAUTION  Do not use lubricating oil on the o-ring. The o-ring will increase in size when in contact with lubricating oil. Use vegetable oil to lubricate the o-ring.

Lubricate the o-ring and install the support bearing into the gear cover.

Tighten the capscrews.