TM 9-2320-272-24-1
3-133. TRANSMISSION OIL SERVICE INSTRUCTIONS (Contd)
b. Oil Filter Removal
NOTE
Removal of transmission oil filter is basically the same for M939,
M939A1, and M939A2 series vehicles. This procedure covers M939
and M939A1 series vehicles only.
1.
Open access door (1) in cab floor.
CAUTION
Wipe area around dipstick tube before removal to prevent entry of
dirt Damage may occur if dirt or dust enters transmission.
2.
Remove screw (5) and washer (4) from transmission (2).
3.
Remove tiedown strap (7) from dipstick tube (3) and tube (6). Discard tiedown strap (7).
4.
Loosen flare nut (8) and remove dipstick tube (3) from transmission oil pan (14).
5.
Remove twenty-one screws (15) from transmission oil pan (14).
6.
Remove oil pan (14) and oil pan gasket (13) from transmission (2). Discard gasket (13).
7.
Remove screw (16) and oil filter assembly (17) from transmission (2).
8.
Remove oil filter assembly (17) from suction tube (12). Discard oil filter assembly (17).
WARNING
Drycleaning solvent is flammable and will not be used near open
flame. Use only in well-ventilated areas. Failure to do so may
result in injury to personnel.
9.
Remove suction tube (12) and rubber O-ring (11) from transmission (2). Discard O-ring (11) and
clean suction tube (12) thoroughly with drycleaning solvent.
10.
Remove transmission oil cooler filter (para. 3-139).
11.
Disconnect transmission oil cooler hoses (18) and (20) from transmission oil filter base (19).
CAUTION
Compressed air source will not exceed 60 psi (41 kPa). Doing so
may cause damage to internal components of the transmission.
12.
Using compressed air, drain remaining oil from transmission oil cooler hoses (18) and (20).
13.
Connect transmission oil cooler hoses (18) and (20) to transmission oil filter base (19).
14.
Install transmission oil cooler filter (para. 3-139).
c . Oil Filter Installation
NOTE
Installation of transmission oil filter is basically the same for
M939, M939A1, and M939A2 series vehicles. This procedure
covers M939 and M939A1 series vehicles only.
1.
Position new rubber O-ring (11) on suction tube (12) and slide downward until O-ring (11) contacts
suction tube lip (21).
2.
Install suction tube (12) in transmission oil input port (10), pressing until O-ring (11) seats on oil
input port (10).
3.
Install new oil filter assembly (17) on suction tube (12), pressing until oil filter assembly intake
grommet (22) contacts suction tube lip (23).
4.
Install oil filter assembly (17) on transmission mounting boss (9) with screw (16). Tighten screw (16)
10-15 lb-ft (14-20 Nm).
3-356
