(c) Camshaft gear.
(3) Remove bolt (25. fig. 3-40), lockwasher
1 Remove four bolts (12) from
(24), and flatwasher (23), then use puller to remove
camshaft gear (17).
crankshaft pulley (18).
2 Position a puller and remove gear
(4) Remove six capscrews (21), lockwashers
(17) from the crankshaft.
(20) and damper (19) from crankshaft. Remove two pins
(d) Fuel injection pump drive gear.
(22) when necessary.
1 Remove nut (7).
(5) Remove bolts (28 and 33) and
2 Position puller and remove gear
lockwashers (27 and 32), then remove support (26),
(3) from shaft (6).
shims (29, 30, and 31), seal (34), and bushings (35).
(e) Oil pump drive gear.
(6) Remove five nuts (1), lockwashers (2),
1 Remove ring (15).
cover (4), gasket (5),and pin (6) from cover (7). Remove
2 Position puller and remove gear
studs (3, 37, and 38) when necessary.
(14).
(7) Remove bolt (36) and stud (37) and
lockwashers (2) from cover (7), then remove cover (7)
c. Rear Plate Removal.
and gasket (8) from engine.
(8) Remove bolt (9), retainers (10, 11, 16, and
(1) Remove 12 capscrews (2).
17), nut (14) and lockwasher (13), then remove plate
(2) Remove rear plate (1) and gasket from
(12) and gasket (15).
b. Timing Gear Train Removal. Remove timing
d. Installation. Assemble and install by reversing
gear train in a manner similar to that described in
the procedures described in a through c above. Aline
paragraph 3-30b above.
timing marks.
c. Cleaning, Inspection, and Repair.
Clean,
e. Cleaning, Inspection, and Repairs.
inspect, and repair in a manner similar to that described
(1) Clean all parts and dry thoroughly before
in paragraph 3-30c above, using table 11 for dimensional
inspection or reassembly.
clearances and tolerances.
(2) Inspect all gears for chipped, broken, or
worn teeth. Inspect shafts for straightness or wear. Use
d. Installation. Install timing gear train and cover by
table 12 for dimensional clearances and tolerances.
reversing the procedures covered in a and b above.
(3) Repair by replacing damaged or
Aline timing marks.
excessively worn components.
e. Timing the Engine.
f. Timing the Engine.
(1) Remove flywheel pointer cover from
(1) The idler gear (20, fig. 3-39) is the mating
housing then turn flywheel in direction of engine rotation
gear for all others in the gear train. The face of this gear
until the No. 1 piston is at top center on the compression
has two letters "O" (19) and "I" (26).
stroke.
(2) When the No. 1 piston is at top dead
(2) The timing marks on gears should be
center, the "O" on idler gear and the "O" on crankshaft
matched as follows:
gear (17) must coincide. The "T" on idler gear and "T"
(a) The C on crankshaft drive gear must
on camshaft gear (11) must coincide at the same instant
coincide with the C on camshaft gear.
the "O" marks are aligned.
(b) The F on camshaft gear must
(3) Line up the "6" injection pump gear timing
coincide with the F on accessory drive idler gear.
mark (5) on injection pump drive gear (3) which
(c) The AB on accessory drive gear
corresponds to the number of cylinders in the engine,
must coincide with the B on accessory drive idler gear.
with the TDC mark (4) on rear plate (1).
(3) If the timing marks are not properly
aligned, they must be removed from their shafts and
repositioned until the marks do coincide as described in
3-31. Front Cover and Timing Gear Train (Engine
(2) above.
Model D333TA)
3-32. injection Pump Drive (Engine Model 687C1 8
a. Front Cover Removal.
ES)
(1) Remove engine (para 2-9).
a. Removal and Installation.
(2) Remove all accessories that will interfere
(1) Remove fuel injection pump (para 3-17).
with front cover removal.
(2) Remove flywheel housing (para 3-40).
AGO 20051A
3-49
