SUPPRESSION GP-CAB SOUND 2910103 - Caterpillar

(1) Maximum permissible temperature of the gear for installation on the camshaft (do not use a torch) ... 600° F(315° C)(2) Tight fit between the gear and camshaft ... .0025 to .0055 in.(0.060 to 0.140 mm)(3) Diameter of the surfaces (journals) for the camshaft bearings (new) ... 2.7500 .0005 in.(69.850 0.013 mm) Bore in front bearing for the camshaft (new) ... 2.7547 .0019 in.(69.969 0.048 mm)Bore in the other six bearings for the camshaft (new) ... 2.7552 .0024 in.(69.982 0.061 mm)(4) Thickness of thrust plate (new) ... .183 .001 in.(4.65 0.03 mm) End play of the camshaft ... .004 to .010 in.(0.10 to 0.25 mm)(5) Height of camshaft lobes. To find lobe height, use the following procedure:A. Measure camshaft lobe height (5).B. Measure base circle (7).C. Subtract base circle (STEP B) from lobe height (STEP A). The difference is actual lobe lift (6).D. Specified camshaft lobe lift (6) is: a. Exhaust lobe ... .3458 in.(8.783 mm)b. Intake lobe ... .3189 in.(8.100 mm)Minimum permissible difference between actual lobe lift (STEP C) and specified lobe lift (STEP D) is .005 in. (0.13 mm).