TM 9-6115-604-34
NAVFAC P-8-633-34
9-18. TIMING GEARS AND COVER REPLACEMENT.
a.
Remove.
(1)
Remove the radiator in accordance with the Operator and Organizational Maintenance Manual.
(2)
Remove the water pump in accordance with the Operator and Organizational Maintenance Manual.
(3)
Remove the accessory drive and fuel pump in accordance with paragraphs 6-9 and 6-27.
(4)
Remove the idler pulley assembly in accordance with the Operator and Organizational Maintenance
Manual.
(5)
Remove the accessory drive pulleys in accordance with paragraph 9-33.
(6)
Remove the front engine support in accordance with paragraph 9-36.
(7)
Refer to paragraph 9-38, and remove capscrews (18, Figure 9-68), lockwashers (7), and washers (8)
securing oil pan (20) to cover.
(8)
Remove the hexagon head screws (1, Figure 9-15), capscrews (2 and 3), lockwashers (4), and hexagonal
nuts (60).
NOTE
Two persons will be required to perform the following procedure.
(9)
Install four capscrews (9/16 inch, 3 inch minimum thread) in the four threaded holes provided in the cover
(5) for use as jacking screws.
(10)
Tighten each jacking screw 1/2 turn at a time until the cover (5) is free of the dowels (7), and remove the
cover.
(11)
Remove and discard the gasket (6). Remove the dowels (7) only if damaged.
(12)
Remove the capscrew (8), lockwasher (9), and timing pointer (10) from the cover (5) only if damaged.
(13)
Remove pipe plugs (16, 17, and 18) from the cover (5) and remove the accessory drive and crankshaft
seals in accordance with paragraph 9-33 only if showing evidence of leakage.
(14)
Remove the bolts (33) from the right bank and left bank idler assemblies, and remove the washers (34),
idler shafts (35), and remove the idler gears (36 and 37) and thrust washers (38) from the idler shafts.
(15)
Remove the capscrew (39), washer (34), and remove the water pump idler gear (40), thrust washers (38),
and water pump idler shaft (41).
(16)
Remove the left and right bank camshaft gears (29 and 30) using puller kit 3376400, and remove the keys
(31) only if damaged.
(17)
Remove the crankshaft gear (43) as follows:
(a)
Attach the puller jaw 3375835, behind the crankshaft gear (43), and attach the puller assembly
3375834 to the puller jaw.
CAUTION
To avoid crankshaft damage, do not exceed 350 pound-feet (475 newton-meters) of torque on
the puller screw. If the torque required to move the gear exceeds 350 pound-feet (475 newton-
meters), apply heat to the gear. Do not reuse the gear if heated.
(b)
Observing the above caution, use a torque wrench to turn the puller screw until the crankshaft gear is
free of the shaft and remove the gear (43) and key (44).
NOTE
Because of its size and weight, assistance will be needed to remove the housing.
(18)
Remove the capscrews (45) and lockwashers (46). Using a soft hammer, tap the housing (47) loose from
the dowels (49), and remove the housing.
(19)
Remove and discard the gasket (48). Remove the dowels (49) only if damaged.
9-37
