G3306 TRUCK ENGINE Caterpillar


Timing Gears

Usage:

(1) Fuel pump drive gear.

(2) Washer. Assemble with large diameter away from gear.

(3) Bolt. With the timing pin and timing bolt correctly installed, put a clockwise force of 70 N·m (50 lb ft) on the drive gear for the fuel pump and tighten bolt (1) to a torque of ... 270 ± 25 N·m (200 ± 20 lb ft)

(4) Fuel pump idler gear.

End play for the idler gear (new) ... 0.10 to 0.41 mm (.004 to .016 in)

Maximum permissible end play (worn) ... 0.86 mm (.034 in)

Bore in bearing for the idler gear (new) ... 35.018 ± 0.048 mm (1.3787 ± 0.0019 in)

Diameter of shaft for idler gear (new) ... 34.955 ± 0.013 mm (1.3762 ± 0.0005 in)

Clearance between shaft and bearing (new) ... 0.033 to 0.168 mm (.0013 to .0066 in)

Maximum permissible clearance between shaft and bearing worn ... 0.23 mm (.009 in)

(5) Tighten two bolts to a torque of ... 50 ± 10 N·m (37 ± 7 lb ft)

(6) Tighten nut to a torque of ... 50 ± 10 N·m (37 ± 7 lb ft)

(7) Plate. Assemble machined side of plate adjacent to the shaft.

(8) Camshaft gear.

(9) Tighten bolts to a torque of ... 55 ± 10 N·m (40 ± 7 lb ft)

(10) Crankshaft gear.

Maximum temperature of the gear for installation on the crankshaft ... 316°C (600°F)

Align cam shaft gear (8) and crankshaft gear (10) using timing marks as shown.

(11) Idler gear for the oil pump.

(12) Drive gear for oil pump.

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