TM-9-2320-361-34
2-1/2-TON, 6x6, M44A2 SERIES TRUCKS (MULTIFUEL)
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE
MAY 1992
TM-9-2320-361-34 - Page 143 of 764
TM9-2320-361-34
5-4. FUEL INJECTION PUMP REPLACEMENT
(Contd)
Remove caps or plugs from hoses, connections, and openings before
reconnection. Failure to do so may result in damage to equipment.
b. Installation
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
5-12
Aline timing marks (6) on crankshaft damper (8) with timing pointer (5).
Install drive gear hub (4) on fuel injection pump (10) with new lockwasher (11) and nut (12).
Install fabricated tool on drive gear hub (4) with two screws (13). Tighten nut (12) 66-71 lb-ft
(90-96 N-m). Remove screws (13) and tool.
Remove four screws (14), lockwashers (15), timing cover (16), and gasket (17) from fuel injection
pump (10). Discard lockwashers (15) and gasket (17).
Remove two screws (22), lockwashers (23), timing window cover (21), and gasket (20) from fuel
injection pump (10). Discard lockwashers (23) and gasket (20).
NOTE
The fuel injection pump camshaft contains an over-center lobe
which may prevent the timing mark on the hub from remaining in
line with the pointer. The pump mark must be alined with the
pointer when installing the fuel injection pump drive gear and
retaining plate.
Aline timing mark (18) on drive gear hub (4) with pointer (19) when the marked tooth (24) in the
timing window (25) is visible.
Install new gasket (30) and fuel injection pump (10) on adapter (31) with two new lockwashers (26),
screws (27), and screw (29).
Install bracket (34) and new lockplate (37) on fuel injection pump (10) and crankcase (32) with two
new lockwashers (33), screws (38), new lockwashers (36), and screws (35). Bend lockplate ends (37)
over screws (35).
Install drive gear (7) on drive gear hub (4).
NOTE
The three elongated holes in the fuel injection pump drive gear
allow about 20° free rotation around the injection pump drive gear
hub. In cases where the alinement mark will not aline with pointer,
it will be necessary to remove drive gear retaining plate and drive
gear to reposition the gear on hub.
Install retaining plate (3) on drive gear (7) with three new lockwashers (2) and screws (1). Do not
tighten screws (1).
Rotate shaft (9) clockwise, as necessary, to aline timing mark (18) on drive gear hub (4) with
point (19).
Hold shaft (9), in alined position, and tighten three screws (1) 23-27 lb-ft (31-37 N-m).
Aline timing marks (6) on crankshaft damper (8) with timing pointer (5).
Install new gasket (20) and timing window cover (21) with two new lockwashers (23) and screws (22).
Install new gasket (17) and timing cover (16) on fuel injection pump with four new lockwashers
(15)
and screws (14).
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