C2.2 Engines for Caterpillar Built Machines Caterpillar

Illustration 1	g03785127
Typical example

(1) Height of the camshaft lobe for the inlet and exhaust valves ... 34.438 to 34.538 mm (1.35582 to 1.35976 inch)

Service limit ... 34.1 mm (1.34252 inch)

Illustration 2	g00295323
Typical example

(A) Actual camshaft lobe lift

(B) Height of the camshaft lobe

(C) Base circle

To determine the lobe lift, use the procedure that follows:

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

2. Measure the base circle (C).

3. Subtract the base circle that is found in Step 2 from the height of the camshaft lobe that is found in Step 1. The difference is the actual camshaft lobe lift.

Maximum camshaft run out ... 0.03 mm (0.00118 inch)

Service limit ... 0.1 mm (0.00394 inch)

Illustration 3	g03785128
Typical example

(2) Retainer plate for the camshaft

(3) Tighten the setscrews for the retainer plate for the camshaft to the following torque. ... 11 N·m (97 lb in)

(4) Camshaft gear

(5) Tighten the nut for the camshaft gear to the following torque. ... 70 N·m (52 lb ft)