3408 & 3408B DIESEL TRUCK ENGINE Caterpillar


Front Timing Gears

Usage:

(1) Fuel injection pump drive gear and timing advance unit.

(2) Camshaft gear.

NOTE: Make alignment of "V" mark as shown.

(3) Water pump drive gear.

(4) Gear for attachment drive groups.

(5) Idler gear assembly.

NOTE: Make alignment of "V" marks as shown.

(6) Bore in the bearing (new) ... 63.602 ± 0.038 mm (2.5040 ± .0015 in.)

Diameter of the shaft (new) ... 63.500 ± 0.013 mm (2.5000 ± .0005 in.)

NOTE: The groove in the gear and the groove in the bearing must not be out of alignment by more than ± 5°.

(7) End clearance (new) ... 0.15 to 0.48 mm (.006 to .019 in.)

(8) Plate. The lubrication groove must be against the gear.

(9) Crankshaft gear.

NOTE: Make alignment of "V" mark as shown.

(10) Engine oil pump drive gear.

(11) Torque for bolt ... 55 ± 7 N·m (40 ± 5 lb. ft.)

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