C9 Industrial Engines Caterpillar

Illustration 1	g01101508

(1) The following dimensions are located in the area that is shown above.

New thrust washer thickness ... 4.70 mm (0.185 inch)

to ... 4.76 mm (0.187 inch)

End play of a new camshaft ... 0.10 ± 0.08 mm (0.0039 ± 0.0031 inch)

Maximum permissible end play of a worn camshaft ... 0.46 mm (0.018 inch)

(2) Exhaust lobe

(3) Inlet lobe

(4) Diameter of the camshaft journals ... 65.126 ± 0.013 mm (2.5640 ± 0.0005 inch)

Illustration 2	g01101513

(5) Camshaft lobe lift

Exhaust lobe ... 6.862 mm (0.2702 inch)

Inlet lobe ... 8.655 mm (0.3407 inch)

To find the camshaft lobe lift, use the procedure that follows:

1. Measure the camshaft lobe height (6).

2. Measure the base circle (7).

3. Subtract the base circle that is found in Step 3 from the camshaft lobe height that is found in Step 2. The difference is the actual camshaft lobe lift (5).

Maximum permissible difference between actual lobe lift and the specified lobe lift of a new camshaft ... ± 0.10 mm (.004 inch)