TUBE ASSEM. 4K8492 - Caterpillar

Illustration 1 g00636362
(1) Fuel injection pump drive gear Bore diameter of the fuel injection pump drive gear ... 36.00 to 36.06 mm (1.417 to 1.419 inch) Clearance between the fuel injection pump drive gear and the drive gear hub ... 0.003 to 0.075 mm (0.0001 to 0.0030 inch) Tighten the bolts for the fuel injection pump drive gear to the following torque. ... 28 N m (21 lb ft) (2) Camshaft gear Bore diameter of camshaft gear ... 34.93 to 34.95 mm (1.3750 to 1.3760 inch) Outside diameter of camshaft hub ... 34.90 to 34.92 mm (1.3741 to 1.3747 inch) Clearance between camshaft gear and camshaft hub ... 0.008 to 0.048 mm (0.0003 to 0.0019 inch) (3) Tighten the bolt for the camshaft gear to the following torque. ... 95 N m (70 lb ft) (4) Idler gear and hub Diameter of idler gear bore ... 57.14 to 57.18 mm (2.2495 to 2.2512 inch) Diameter of idler gear bore (needle bearing) ... 69.01 to 69.03 mm (2.717 to 2.718 inch) Width of idler gear and split bearing assembly ... 30.14 to 30.16 mm (1.186 to 1.187 inch) Inside diameter of idler gear bearing ... 50.78 to 50.80 mm (1.999 to 2.000 inch) Outside diameter of idler gear hub ... 50.70 to 50.74 mm (1.9960 to 1.9975 inch) Outside diameter of idler gear hub (needle bearing) ... 54.987 to 55.000 mm (2.1648 to 2.1654 inch) Clearance of idler gear bearing on hub ... 0.04 to 0.10 mm (0.0016 to 0.0039 inch) Idler gear end play ... 0.10 to 0.20 mm (0.004 to 0.008 inch) Maximum permissible end play ... 0.38 mm (0.015 inch) (5) Tighten the bolts for the idler gear to the following torque. ... 44 N m (33 lb ft) (6) Accessory drive gear (7) Crankshaft gear Bore diameter of crankshaft gear ... 47.625 to 47.650 mm (1.8750 to 1.8760 inch) Outside diameter of crankshaft hub ... 47.625 to 47.645 mm (1.8750 to 1.8758 inch) Clearance of gear on crankshaft ... -0.020 to +0.048 mm (-0.0008 to +0.0010 inch) (8) Oil pump idler gear Inside diameter of oil pump idler gear bearing ... 22.23 to 22.26 mm (0.875 to 0.876 inch) Outside diameter of oil pump idler gear shaft ... 22.19 to 22.21 mm (0.873 to 0.874 inch) Clearance of oil pump idler gear bearing on shaft ... 0.020 to 0.066 mm (0.0008 to 0.0026 inch)Idler gear end play Older engines ... 0.03 to 0.33 mm (0.001 to 0.013 inch) Newer four cylinder engines ... 0.012 to 0.643 mm (0.0005 to 0.0253 inch) Newer six cylinder engines ... 0.020 to 0.650 mm (0.0008 to 0.0256 inch)Backlash for all gears (minimum) ... 0.08 mm (0.003 inch)