COVER GP-VALVE MECHANISM 4N2272 - Caterpillar

Illustration 1 g02873698
Table 1
Item Qty Part Specification Description
Before assembly of the camshaft to the cylinder block, apply a thin coat of green Loctite® LB 8028 Camshaft Lube to the outer diameter of each camshaft journal and camshaft bearing.
1 1 300-3128 Thrust Washer Before assembly, apply green Loctite® LB 8028 Camshaft Lube to the sides of the thrust washer. Apply a thin coat of green Loctite® LB 8028 Camshaft Lube to the area of the camshaft bearing that is in contact with the groove of the thrust washer.
Thickness of new thrust washer is 8.50 0.05 mm (0.335 0.002 inch).
Width of the groove in new camshaft for thrust washer is 8.75 0.05 mm (0.344 0.002 inch).
End play for new camshaft is 0.15 to 0.35 mm (0.006 to 0.014 inch).
A - - Diameter of the camshaft journal is 91.88 0.02 mm (3.617 0.001 inch).
Illustration 2 g02873716
Table 2
Specification for 274-7725 Camshaft Gp
Item Qty Part Specification Description
2 8 109-3001 Taperlock Stud Torque to 35 5 N m (26 4 lb ft).
B 1 6V-3535 Dowel Extension of the dowel from the end of the camshaft is 11.5 0.5 mm (0.45 0.02 inch).
Illustration 3 g02873717
Table 3
Specification for 274-7725 Camshaft Gp
Item Qty Part Specification Description
- - - Use the following procedure in order to determine the actual camshaft lobe lift:
1. Measure camshaft lobe height (D).
2. Measure the base circle (E).
3. Subtract the base circle (E) from the camshaft lobe height (D). The difference is the actual camshaft lobe lift.
C - - Specified camshaft lobe lift for:
Inlet lobe is 12.448 mm (0.4901 inch).
Exhaust lobe is 17.184 mm (0.6765 inch).