SEAL-WIPER 2253286 - Caterpillar

(1) Camshaft drive gears.(2) Plate.(3) Camshaft idler gears.(4) Diameter of shafts (new) ... 74.900 0.015 mm (2.9488 .0006 in.) Bore in bearings (after assembly) ... 75.000 0.055 mm (2.9528 .0022 in.)(5) Cluster idler gear (balancer gear).(6) Plate. Replaced by gear for hydramechanical protective system drive or adapter for accessory drive.(7) Bolts that hold camshaft drive gears (1) in position. Install the gears as follows: a. Pin both camshafts and put camshaft drive gears (1) in position on each camshaft taper.b. For correct timing, all gear clearance (backlash) must be removed. Turn camshaft drive gears (1) in the same direction as crankshaft rotation and hold in this position.c. Install plates (2) and (6) to hold the camshaft drive gears (1) to each camshaft.d. Tighten bolts (7) in steps to a torque of ... 360 50 N m (265 35 lb.ft.)e. Hit bolts (7) and again tighten the bolts to a torque of ... 360 50 N m (265 35 lb.ft.) If necessary, repeat Step 7e until the bolts hold torque (cannot be moved) to make sure the drive gears are in full contact with the taper on the camshafts.(8) Diameter of shaft (new) ... 74.900 0.015 mm (2.9488 .0006 in.) Bore in bearing (after assembly) ... 75.000 0.053 mm (2.9528 .0021 in.)Bearing joint must be in center of heavy section in gear at assembly.(9) Balancer gear marks must be in alignment with crankshaft gear marks as shown for SAE standard rotation engines.(10) Crankshaft gear.(11) Balancer gear marks must be in alignment with crankshaft gear marks as shown for SAE opposite rotation engines.