TUBE AS 4550467 - Caterpillar

(1) Distance dowels extend from housing ... 6.0 0.5 mm (.236 .020 in.)(2) Diameter of gear shaft (new) ... 15.890 0.013 mm (.6256 .0005 in.) Bore in bearings for gear shaft ... 16.027 0.013 mm (.6310 .0005 in.)(3) Diameter of bearings ... 20.70 0.013 mm (.8150 .0005 in.) Bore in housing for the bearings ... 20.66 0.03 mm (.813 .001 in.)Distance bearings are installed from ends of bore ... 1.5 0.5 mm (.059 .020 in.)(4) Install the seal with the lip toward the engine as shown. Put clean engine oil on the lip of the seal.(5) Distance bearing is installed ... 26 1 mm (1.02 .04 in.)(6) Distance dowels extend from gear ... 9.5 .0.5 mm (.374 .020 in.)(7) Distance two dowels extend from housing ... 6.0 0.5 mm (.236 .020 in.)(8) Drive gear. Tighten the bolts that hold drive gear (8) and the camshaft drive gear as follows: a. Pin both camshafts and put the camshaft drive gear in position on camshaft taper. For correct timing, all gear clearance (backlash) must be removed. Turn the camshaft drive gear in the same direction as crankshaft rotation and hold in this position.b. Install drive gear (8) to hold camshaft drive gear to the camshaft.c. Tighten the bolts in steps to a torque of 100 15 N m (75 11 lb.ft.). *d. Hit the face of drive gear (8) and tighten the bolts to a torque of 100 15 N m (75 11 lb.ft.). *e. Again hit the face of drive gear (8) and again tighten the bolts to a torque of 100 15 N m (75 11 lb.ft.). * ... 360 50 N m (265 35 lb.ft.)* On later engines with one bolt camshaft drive gears, the correct torque is If necessary, repeat the steps above until the bolts hold torque (cannot be moved) to make sure the camshaft drive gear is in full contact with the taper of the camshaft.