C15 Engine for Combat and Tactical Vehicles Caterpillar

Note: Before installation of the camshaft, ensure that the camshaft and the camshaft bearings are clean. lubricate the camshaft lobes with a 50/50 mixture of 8T-2998 Lubricant and clean engine oil. Apply a thin coat of clean engine oil on the camshaft bearings.

Illustration 1	g01525229
(1) Exhaust lobe (2) Injector lobe (3) Inlet lobe (4) Front of camshaft

(A) Diameter of camshaft journal ... 84.85 ± 0.02 mm (3.341 ± 0.001 inch)

Illustration 2	g01525234

Use the following procedure in order to determine the actual camshaft lobe lift :

1. Measure the camshaft lobe height (C).

2. Measure the base circle (D).

3. Subtract the base circle (D) from the lobe height (C). The difference is the actual camshaft lobe lift .

(B) Specified camshaft lobe lift

Exhaust lobe ... 8.51521 mm (0.335244 inch)

Injector lobe ... 10.33686 mm (0.406962 inch)

Inlet lobe ... 9.62494 mm (0.378934 inch)

The maximum permissible difference between the actual lobe lift in Step 3 and the specified lobe lift is 0.13 mm (0.005 inch).

Illustration 3	g01527795

(5) Torque for three flat head screws ... 13 ± 3 N·m (115 ± 27 lb in)