3500C Marine Engines Caterpillar


Camshaft

Usage:

3508C PXB


Illustration 1g03333773


Illustration 2g03333774

Table 1
Specification for 380-7680 Camshaft Gp 
Item  Qty  Part  Specification Description 
7N-3218 Thrust Washer  Thickness of a new thrust washer is 8.50 ± 0.05 mm (0.335 ± 0.002 inch)
Diameter of bearing journals for a new camshaft is 91.88 ± 0.02 mm (3.617 ± 0.001 inch)
Thickness of the groove in a new camshaft assembly for thrust washer (1) is 8.75 ± 0.05 mm (0.344 ± 0.002 inch)


Illustration 3g03333775
127-5404 Camshaft As


Illustration 4g03333776
133-4079 Camshaft As

Table 2
Item  Qty  Part  Specification Description 
5B-5821 Dowel  Extension of the new dowel is 12.0 ± 0.5 mm (0.47 ± 0.02 inch)


Illustration 5g03333777

Table 3
Item  Qty  Part  Specification Description 
Use the following procedure in order to determine the camshaft lobe lift:

1. Measure camshaft lobe height (E).
2. Measure base circle (F).
3. Subtract the base circle (F) from the camshaft lobe height (E). The difference is the actual camshaft lobe lift. 
Specified camshaft lobe lift:

Inlet lobe is 12.7500 mm (0.50197 inch).
Injector lobe is 13.7313 mm (0.54060 inch).
Exhaust lobe is 13.2499 mm (0.52165 inch)
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