BASE-FUEL PRIMING PUMP 7W8834 - Caterpillar

Refer to Guideline For Reusable Parts and Salvage Operations, SEBF8146, "Visual Inspection of Camshafts" and Guideline For Reuse and Salvage Guidelines, SEBF8097, "Measurement of the Camshaft" for information that relates to the reusability of camshafts.
Illustration 1 g01380521
(1) Camshaft drive gear (2) Camshaft (A) Diameter of the bearing journals for a new camshaft ... 69.850 0.013 mm (2.7500 0.0005 inch)Bore in the front and the rear bearings for a new camshaft ... 69.969 0.048 mm (2.7547 0.0019 inch)Bore of inner bearings for a new camshaft ... 69.982 0.061 mm (2.7552 0.0024 inch) (B) Protrusion of dowel ... 8.76 0.25 mm (0.345 0.010 inch) (C) Plate Thickness of a new plate ... 4.65 0.03 mm (0.183 0.001 inch) Thickness of the groove in the new camshaft ... 4.83 0.05 mm (0.190 0.002 inch) End play of camshaft ... 0.10 to 0.25 mm (0.004 to 0.010 inch)
Illustration 2 g01380522
(E) Camshaft lobe liftSpecified camshaft lobe lift Exhaust lobe ... 8.783 mm (0.3458 inch) Inlet lobe ... 8.100 mm (0.3189 inch)In order to determine the height, use the following procedure:
Measure camshaft lobe height (D) .
Measure base circle (F) .
Subtract the base circle (F) from the lobe height (D). The difference is the actual camshaft lobe lift.