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TM 5-4320-305-24
3-11.
REPLACE/REPAIR OIL PUMP ASSEMBLY (Continued)
2
Loosen cap screw/nut (4) and remove suction pipe (5) and duplex ring (6) from oil pump (7). Discard the duplex
ring.
3
Remove screw (8) and spring lockwasher (9), to remove shield (10) and washer (11) from oil pump (7).
4
Remove screw (12) that secures yoke spring (13), and remove the assembled yoke spring, lube oil pump (7), and
hydraulic pipe (14).
5
Remove preformed packing (15) from hydraulic pipe (14). Discard the preformed packing.
6
Check the reference marks on idler gear (16). Turn the gears until the reference marks aline between each set of
gears. Notice the combination of marks between each set of gears.
7
Remove the assembled idler gear (16) and bushing (17).
8
Remove journal (18) from crankcase.
9
Remove bushing (19) from crankcase.
DISASSEMBLY:
1
Remove bolt (20), nut (21), and toothed washer (22). Remove pipe clips (3) from suction pipe (5).
2
Pull assembled yoke spring (13) and hydraulic pipe (14) from oil pump (7). Remove and discard preformed packing
(23).
3
If either hydraulic pipe (14) or yoke spring (13) require replacement, remove the spring from the pipe. Otherwise,
leave the pipe and spring assembled.
CLEANING/INSPECTION:
WARNING
Death or serious injury could occur if diesel fuel oil is not handled
carefully. Use in a well-ventilated area away from open flame,
arcing equipment, ignition sources, heaters, or excessive heat.
Always store fuel in proper, marked containers. DO NOT SMOKE.
Death or serious injury could occur if compressed air is directed
against the skin. Do not use compressed air for cleaning or drying
unless the pressure is/has been reduced to 30 psi (2. 11 kgcm2 ) or
less. When working with compressed air always use chip guards,
eye protection, and other personal protective equipment.
1
Clean oil pump (7), idler gear (16), journal (18), suction pipe (5), hydraulic pipe (14), yoke spring (13), shield (10),
and pipe clips (3) with diesel fuel oil. Dry with compressed air and/or soft clean cloth. Inspect components for
excessive wear, rust, damage, and/or warpage. Replace if worn or damaged.
2
Inspect yoke spring (13), shield (10), and pipe clips (3) for wear, distortion, or damage that would prevent the secure
fastening of components or interfere with the operation of the gears or pump. Repair or replace damaged
components.
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