FILTER 4301981 - Caterpillar

Illustration 1 g06042344
(1) Camshaft drive gears.
(2) Plate.
(3) Camshaft idler gears.
(5) Cluster idler gear (balancer gear).
(6) Plate.
(10) Crankshaft gear.
Table 1
Specification for Gear Group (Rear)
Item Qty Part Specification Description
4 - - Diameter of new shaft is 74.900 0.015 mm (2.9488 0.0006 inch).
After assembly, bore in bearings assembly is 75.000 0.055 mm (2.9528 0.0022 inch).
7 - Bolt Use the following procedure to install the gears:
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 the bolts in steps to 360 50 N m (265 37 lb ft).
e. Hit bolts and again tighten the bolts to 360 50 N m (265 37 lb ft).
If necessary, repeat Step 7e until the bolts hold torque (cannot be moved) to make sure that the drive gears are in full contact with the taper on the camshafts.
8 - - Diameter of new shaft is 74.900 0.015 mm (2.9488 0.0006 inch).
After assembly, bore in bearings assembly is 75.000 0.053 mm (2.9528 0.0021 inch).
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.
11 - - Balancer gear marks must be in alignment with crankshaft gear marks as shown for SAE opposite rotation engines.