3145, 3150 & 3160 INDUSTRIAL ENGINES Caterpillar

(1) End play for the camshaft ... .007 ± .003 in.(0.18 ± 0.08 mm)

Maximum permissible end play (worn) ... .020 in.(0.51 mm)

(2) Diameter of bearing surfaces (journals) of the camshaft ... 2.5000 ± .0005 in.(63.500 ± 0.013 mm)

Bore in bearing for camshaft ... 2.5035 ± .0015 in.(63.599 ± 0.038 mm)

Maximum permissible clearance between bearing and bearing surface (journal) (worn) ... .007 in.(0.18 mm)

(3) Height of the lobes of camshaft:

To get height (3), use the following procedure:

A. Measure base circle (5).

B. Add lobe lift (4) to base circle measurement.

Total is camshaft lobe height.

NOTE: Camshaft lobe lift (4) is:

a. Exhaust lobe ... .3071 in.(7.800 mm)

b. Intake lobe ... .3077 in.(7.816 mm)

Minimum permissible height of lobes is .025 in. (0.64 mm) less than measurement in step (B).