TRACK GP 2187347 - Caterpillar

Illustration 1 g01277351
Checking the end play of the camshaft
(1) End play of a new camshaft ... 0.10 to 0.55 mm (0.004 to 0.022 inch)Maximum permissible end play of a worn camshaft ... 0.60 mm (0.023 inch)
Illustration 2 g01277354
Typical camshaft
(2) Bolt Tighten the bolt to the following torque. ... 95 N m (70 lb ft) (3) Camshaft thrust washer Thickness of the thrust washer ... 5.49 to 5.54 mm (0.216 to 0.218 inch)Depth of the recess in the cylinder block for the thrust washer ... 5.54 to 5.64 mm (0.218 to 0.222 inch)Tolerance of the thrust washer in cylinder block front face ... −0.154 to −0.003 mm (−0.0006 to −0.0001 inch) (4) The diameters of the camshaft journals are given in the following table.
Table 1
Diameters of Camshaft Journals
Camshaft Journals Standard Diameter
1 50.711 to 50.737 mm (1.9965 to 1.9975 inch)
2 50.457 to 50.483 mm (1.9865 to 1.9875 inch)
3 49.949 to 49.975 mm (1.9665 to 1.9675 inch) Maximum wear on the camshaft journals ... 0.05 mm (0.0021 inch)
Illustration 3 g01345411
Typical example
(5) Camshaft lobe lift Naturally aspirated Inlet lobe ... 7.201 to 7.301 mm (0.2835 to 0.2874 inch)Exhaust lobe ... 7.404 to 7.504 mm (0.2914 to 0.2954 inch)Turbocharged Inlet lobe ... 7.527 to 7.627 mm (0.2963 to 0.3003 inch)Exhaust lobe ... 7.363 to 7.463 mm (0.2899 to 0.2938 inch)Turbocharged aftercooled Inlet lobe ... 7.031 to 7.131 mm (0.2768 to 0.2807 inch)Exhaust lobe ... 7.363 to 7.463 mm (0.2899 to 0.2938 inch) (6) Camshaft lobe height (7) Base circle To determine the lobe lift, use the procedure that follows:
Mount the camshaft between centers.
By using a dial indicator in contact with the surface of the lobe, rotate the camshaft and record the maximum and minimum lift. Note: There may be two lobes on the camshaft. Refer to illustration 3. The surface between the lobes may not return to the radius of the base circle. Using a micrometer to measure the diameter of the base circle may give a inaccurate result.
Subtract the smallest dimension from the largest dimension. The difference is the actual camshaft lobe lift. Maximum permissible deviation between the actual lobe lift and the specified lobe lift of a new camshaft ... 0.05 mm (0.002 inch)