BUSHING 3T8458 - Caterpillar

Refer to Reuse And Salvage Guidelines, SEBF8146, "Visual Inspection of Camshafts" and Reuse And Salvage Guidelines, SEBF8097, "Measurement of the Camshaft" for information that relates to the reusability of camshafts.
Illustration 1 g01380521
(2) CamshaftNote: Do not use a torch to heat the camshaft drive gear. (1) Maximum temperature of the camshaft drive gear for installation on the camshaft ... 315 °C (599 °F) (A) Camshaft bearing journal Diameter of the bearing journals for a new camshaft ... 69.850 0.013 mm (2.7500 0.0005 inch) Bore in the front sleeve bearings and the rear sleeve bearings for a new camshaft after installation ... 69.969 0.048 mm (2.7547 0.0019 inch) Bore of inner sleeve bearings for a new camshaft after installation ... 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 ... 4.648 0.025 mm (0.1830 0.0010 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) Specified camshaft lobe lift Exhaust lobe ... 8.901 mm (0.3504 inch) Inlet lobe ... 8.901 mm (0.3504 inch)In order to determine the actual camshaft lobe lift, use the following procedure:
Measure camshaft lobe height (D) .
Measure base circle (F) .
Subtract the base circle (F) from the camshaft lobe height (D). The difference is the actual camshaft lobe lift.