3176C and 3196 Engines for Caterpillar Built Machines Caterpillar

Illustration 1	g01334458
(2) Camshaft (3) Woodruff key (4) Camshaft drive gear (5) Cylinder block

(A) Diameter of new camshaft journals ... 74.850 ± 0.025 mm (2.9468 ± 0.0010 inch)

(1) Torque for thrust pin ... 28 ± 7 N·m (21 ± 5 lb ft)

Illustration 2	g01415161

(B) Specified camshaft lobe lift

Exhaust lobe ... 9.550 mm (0.3760 inch)

Inlet lobe ... 11.371 mm (0.4477 inch)

Injector lobe ... 10.474 mm (0.4124 inch)

Use the following procedure to find 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) .

The maximum permissible difference between the actual camshaft lobe lift and the specified camshaft lobe lift of a new camshaft is ± 0.13 mm (± 0.005 inch).