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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
UP
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
C
D
B
A
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
B
C
A
A
B
D
C
D
C
C