Service Manual

TIMING GEARS AND GEAR CASE

4. Assemble idler gear shaft with arrow up, as shown

in Fig. 17.

Fig. 17 – Installing Idler Gear Shaft

ARROW

Engine models 432000 and 582000 after date code

990111007, and all engine models 522000 are

equipped with right angle helical timing gears. Timing

marks are identified by letters (A, AA, B, BB, etc.),

instead of numbers. The timing procedure is the same.

5. With crankshaft key at 12 o’clock position,

assemble idler gear so that timing mark 11 (AA) is

aligned with timing mark 1 (A) on crankshaft gear,

timing mark 22 (BB) is aligned with timing mark 2

(B) on camshaft gear, and timing mark 33 (CC) is

aligned with timing mark 3 (C) on injector pump

gear, as shown in Fig. 18.

a. Install oil pump gear.

Fig. 18 – Aligning Timing Marks – Typical

CRANKSHAFT

KEY

12 O’CLOCK

6. Torque screws as shown, Fig. 19.

a. Camshaft Gear: 41.0 Nm (30 ft. lbs.)

b. Idler Gear: 25.0 Nm (220 in. lbs.)

c. Injector Pump Gear: 61.0 Nm (45 ft. lbs.)

d. Oil Pump Gear: 19.0 Nm (170 in. lbs.)

Fig. 19 – Torque Screws

7. Install timing gear cover with new gasket. Note

position, length and number of screws as shown,

Fig. 20.

a. M6 x 55 mm (M6 x 2.5”): 3

b. M6 x 45 mm (M6 x 2.1”): 2

c. M6 x 30 mm (M6 x 1.1”): 9

d. M6 nut: 2

Torque screws and nuts to 8.0 Nm (70 in. lbs.).

Fig. 20 – Installing Timing Gear Cover