BOOT 3P9934 - Caterpillar

Illustration 1 g01427361 (1) The end of the camshaft that is marked "F" must be placed at the front of the engine. Lubricate the camshaft bearings, the journals, and the lobes with a 50/50 mixture of 8T-2998 Lubricant and clean engine oil.
Illustration 2 g01416694
(2) Exhaust lobe
(3) Injector lobe
(4) Inlet lobe (A) Diameter of camshaft journal ... 84.85 0.02 mm (3.341 0.001 inch)
Illustration 3 g01416960 (B) Camshaft lobe lift Use the following procedure in order to determine the camshaft lobe lift:
Measure the camshaft lobe height (C).
Measure the base circle (D).
Subtract the base circle measurement in Step 2 from the camshaft lobe height in Step 1. The difference is the actual camshaft lobe lift (B). Specified camshaft lobe lift Inlet lobe ... 9.431 mm (0.37130 inch)Exhaust lobe ... 8.515 mm (0.3352 inch)Injector lobe ... 10.908 mm (0.42945 inch)The maximum permissible difference between the actual camshaft lobe lift in Step 3 and the specified camshaft lobe lift is 0.13 mm (0.005 inch).