3054 Engine Caterpillar

Illustration 1	g00618583

End play of a new camshaft ... 0.10 to 0.41 mm (0.004 to 0.016 inch)

Maximum permissible end play of a worn camshaft ... 0.53 mm (0.021 inch)

(1) Locating pin

(2) Camshaft thrust washer

Thickness of thrust washer ... 5.49 to 5.54 mm (0.216 to 0.218 inch)

Cylinder block recess depth for thrust washer ... 5.46 to 5.54 mm (0.215 to 0.218 inch)

Relationship of thrust washer to cylinder block front face ... −0.05 to +0.08 mm (−0.002 to +0.003 inch)

(3) Woodruff key

(4) Diameter of camshaft journals

Internal clearance of the journal ... 0.06 to 0.14 mm (0.002 to 0.006 inch)

Illustration 2	g00295323

Camshaft lobe lift

To determine lobe lift, use the procedure that follows:

1. Measure the height (B) of the camshaft lobe.

2. Measure the base circle (C).

3. Subtract the base circle (C) from the height (B) of the lobe. The difference is the actual lobe lift (A).

4. Specified camshaft lobe lift (A)

   Inlet ... 7.62 to 7.69 mm (0.300 to 0.303 inch)

   Exhaust ... 7.71 to 7.79 mm (0.304 to 0.307 inch)

   Minimum permissible height of lobes ... 7.37 mm (0.290 inch)