3500B High Displacement Caterpillar


Camshaft

Usage:

3508B LD3


Illustration 1g03319866

Table 1
Specification for 380-7679 Camshaft Gp 
Item  Qty  Part  Specification Description 
7N-3218 Thrust Washer  Thickness (A) of the groove in a new camshaft assembly is 8.75 ± 0.05 mm (0.344 ± 0.002 inch).
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)


Illustration 2g03319868

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


Illustration 3g03318095

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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