BUSHING 7E8940 - Caterpillar

Illustration 1 g01411677
(1) Camshaft gearDo not use a torch to heat the gear. Maximum temperature of the gear for installation on the camshaft ... 315 °C (600 °F) (A) Dimension Fit between the gear and the camshaft ... 0.640 to 0.140 mm (0.0252 to 0.0055 inch) (B) Thrust plate Thickness of new thrust plate ... 4.65 0.03 mm (0.183 0.001 inch) End play of camshaft ... 0.10 to 0.25 mm (0.004 to 0.010 inch) (C) Camshaft journal Diameter of the camshaft bearing journals on a new camshaft ... 69.850 0.013 mm (2.7500 0.0005 inch) Bore in front and rear bearings for new camshaft ... 69.969 0.048 mm (2.7547 0.0019 inch) Bore in five inner bearings for new camshaft ... 69.982 0.061 mm (2.7552 0.0024 inch)
Illustration 2 g01411715
Use the following procedure to determine the camshaft lobe lift:
Measure the camshaft lobe height (D) .
Measure the base circle (E) .
Subtract the base circle (Step 2) from the camshaft lobe height (Step 1). The difference is the actual lobe lift.
Specified camshaft lobe lift (F) Exhaust lobe ... 8.900 mm (0.3504 inch)Inlet lobe ... 8.900 mm (0.3504 inch)The maximum permissible difference between actual lobe lift (Step 3) and the specified lobe lift (Step 4) is the following value. ... 0.13 mm (0.005 inch)