3508C, 3512C and 3516C Locomotive Engines Caterpillar


Camshaft

Usage:

3508C F1X


Illustration 1g02820918
(1) Left-hand camshaft assembly
(2) Right-hand camshaft assembly

Table 1
Specification for 325-0398 Camshaft Gp 
Item  Qty  Part  Specification Description 
Dimension of groove in a new camshaft for the thrust washer assembly is 8.75 ± 0.05 mm (0.344 ± 0.002 inch)
5B-5821 Dowel  Extension of the dowel from the camshaft assembly is 12.0 ± 0.5 mm (0.47 ± 0.02 inch)
7N-3218 Thrust Washer  Thickness of a new thrust washer is 8.50 ± 0.05 mm (0.335 ± 0.002 inch)
Diameter of bearing journal is 91.88 ± 0.02 mm (3.617 ± 0.001 inch).
Bore in camshaft bearing after installation is 92.00 ± 0.08 mm (3.622 ± 0.003 inch)


Illustration 2g02820936

Table 2
Specification for 325-0398 Camshaft Gp 
Item  Qty  Part  Specification Description 
Specified camshaft lobe lift for
Inlet lobe is 12.73 mm (0.501 inch).
Injector lobe is 13.8065 mm (0.54356 inch).
Exhaust lobe is 13.1 mm (0.52 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. 

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