TM 3-1040-263-34
Section V. OIL PUMP
j.
Insert a 1/4-inch-diameter by 2-inch-long
WARNING
steel dowel pin into the oil pump shaft hole.
k. Screw machine bolt (4, fig. 4-3) into oil
Before performing maintenance, disconnect the spark
pump shaft hole. L
plug wire from the spark plug to prevent accidental
l.
Hold engine pulley, and free oil pump shaft
starting.
from crankshaft (13, fig. 4-16) by tightening machine
bolt (4, fig. 4--3). When oil pump shaft rotates, remove
4-18.
General
oil pump assembly from compressor.
m. Unscrew machine bolt (4) and remove
General support maintenance personnel are authorized
dowel pin.
to replace the oil supply tube, fan guard bracket, angle
n. Remove preformed packing (16, fig. 4-4)
brackets, preformed packing, oil pump assembly, and
and discard.
attaching hardware.
4-20.
Cleaning and Inspection
4-19.
Removal
a. Clean oil supply tube (3, fig. 4-4) and the
a.
Remove canvas group (TM 3-1040-263-
cap (2) in drycleaning solvent.
12).
b. Inspect the oil supply tube (3) for damage.
b.
Remove protecting cage (para 3-7).
c. Inspect cap (2) for defective threads.
c.
Remove plug (3, fig. 4-5) and drain oil
sump.
d. Remove fan group (para 4-5).
4-21.
Installation
e.
Unscrew oil supply tube end nuts, and
remove oil supply tube (3, fig. 4-4) from oil strainer (6,
a. Position the preformed packing (16, fig.
4-4) into the crankcase packing groove.
f.
Unscrew and remove screw (6), lockwasher
CAUTION
(5), and washer (4) securing fan guard bracket (9) to oil
sump.
Center wave washer on backup plate before
g. Remove lockwire (1). Unscrew screw (8),
installing the oil pump (fig. 4-4), see insert A
and remove with washer (7) and fan guard bracket (9)
from oil pump assembly (13).
b. Position the oil pump into the compressor
h. Retain pump shaft in place by using a
crankcase. Assemble the machine bolt (4, fig. 4-3) and
military standard E type retaining ring (14) (MS 3215-
washer (5).
1056) and washers (15) (AN 960 PD 1016L). Select and
install required number of washers as follows:
c. Screw machine bolt (4) through oil pump
shaft into the crankshaft.
(1) Position E type retaining ring (14) in
groove on pump shaft.
d. Hold engine pulley, and tighten machine
(2) Select number of washers (15), by
bolt (4) until the oil pump shaft bottoms.
insertion, that fit between the E type retaining ring (14)
and adjacent oil pump seal.
e. Remove machine bolt (4) and washer (5)
(3) Remove E type retaining ring (14).
from oil pump assembly.
(4) Position washers ((2) above) on pump
shaft.
NOTE
(5) Position E type retaining ring (14) in
When the oil pump shaft is bottomed and the E type
groove on pump shaft.
retaining ring is removed, a one-eight inch space will
remain between the oil pump assembly housing and the
i.
Unscrew three screws (11) and remove
compressor crankcase.
washers (10) and angle brackets (12) from oil pump
assembly (13).
f.
Remove E type retaining ring (14, fig. 4-4)
and washer(s) (15).
4-8
