HEAD 2083888 - Caterpillar

Illustration 1 g00358397
(1) Do not use a torch to heat the gear. Maximum temperature of the gear for installation on the camshaft ... 215 °C (419 °F) (2) Fit between the gear and the camshaft ... 0.64 to 0.140 mm (.0252 to .0055 inch) (3) Diameter of the journals on a new camshaft for camshaft bearings ... 69.850 0.013 mm (2.7500 .0005 inch)Bore in front and rear bearings for new camshaft ... 69.969 0.048 mm (2.7547 .0019 inch)Bore in five inner bearings for new camshaft ... 69.982 0.061 mm (2.7552 .0024 inch) (4) Thickness of new thrust plate ... 4.65 0.03 mm (.183 .001 inch)End play of camshaft ... 0.10 to 0.25 mm (.004 to .010 inch)
Illustration 2 g00285343
(6) Procedure for camshaft lobe height
Measure the camshaft lobe height (6) .
Measure the base circle (7) .
Subtract the base circle (Step 2) from the camshaft lobe height (Step 1). The difference is the actual lobe lift.
Specified camshaft lobe lift (5) Exhaust lobe ... 8.783 mm (.3458 inch)Inlet lobe ... 8.100 mm (.3189 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 (.005 inch)