C7 Engines for Caterpillar Built Machines Caterpillar


Camshaft

Usage:

525C 525


Illustration 1g02970196

Table 1
Specification for 212-4289 Camshaft Gp 
Item  Qty  Part  Specification Description 
107-7694 Thrust Plate  Thickness is 4.70 mm (0.185 inch)
212-4288 Camshaft As  End play of a new camshaft is 0.13 ± 0.08 mm (0.005 ± 0.003 inch)
Maximum permissible end play of a worn camshaft is 0.45 mm (0.018 inch).
Diameter of the camshaft journals is 65.126 ± 0.013 mm (2.5640 ± 0.0005 inch)
Total distance between the shoulder of the camshaft and the shoulder of the gear is 4.83 ± 0.05 mm (0.190 ± 0.002 inch)
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). 
The maximum permissible difference between the actual camshaft lobe lift (C) and the specified camshaft lobe lift of a new camshaft is ± 0.10 mm (0.004 inch).
Specified camshaft lobe lift:
1. For exhaust lobe is 7.707 mm (0.3034 inch).
2. Inlet lobe is 7.970 mm (0.3138 inch).

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