COVER GP-VALVE MECHANISM 2225952 - Caterpillar

Illustration 1 g03333784
Typical example
Table 1
Specification for 261-4683 Camshaft Gp, 381-1959 Camshaft Gp, and 333-2238 Camshaft Gp
Item Qty Part Specification Description
A - - Dimension of groove in a new camshaft assembly for the thrust washer is 8.75 0.05 mm (0.344 0.002 inch).
B 2 5B-5821 Dowel Extension of the dowel from the camshaft assembly is 12.0 0.5 mm (0.47 0.02 inch).
C 2 7N-3218 Thrust Washer Thickness of a new thrust washer is 8.50 0.05 mm (0.335 0.002 inch).
D - - Diameter of the bearing journal is 91.88 0.02 mm (3.617 0.001 inch).
Illustration 2 g02582241
Table 2
Item Qty Part Specification Description
E - - Specified camshaft lobe lift for:
Inlet lobe is 13.25 mm (0.522 inch).
Injector lobe is 13.807 mm (0.5436 inch).
Exhaust lobe is 13.25 mm (0.522 inch).
- - - Use the following procedure in order to determine the actual camshaft lobe lift:
1. Measure camshaft lobe height (F).
2. Measure base circle (G).
3. Subtract the base circle (G) from the camshaft lobe height (F). The difference is the actual camshaft lobe lift.