TM 9-2350-272-24-4
5-46. TRANSMISSION OIL PUMP AND FRONT SUPPORT MAINTENANCE (Contd)
1.
Remove two hook-type seal rings (8) from oil pump (19) and front support (5). Discard seal rings (8).
2.
Remove bearing and race (7) from oil pump (19) and front support (5) or transmission.
3.
Remove oil pump seal ring (1) from oil pump (19) and front support (5). Discard oil pump seal ring (1).
4.
If replacement is necessary, remove needle bearing (6) from front support hub ground sleeve (9).
5.
Install valve pin remover tool on slide hammer on oil pump (19) and front support (5).
Attach valve pin remover tool between coils of valve spring (3) and valve guide pin (2).
6.
NOTE
Assistant will help with step 7.
7.
Remove valve guide pin (2), valve spring (3), and converter pressure regulator valve (4). Discard
valve guide pin (2). Tag valve spring (3) for installation.
WARNING
Regulator valve spring is under approximately 65 lb (29 kg)
compression. Do not remove retaining snapring until compressor
is in place, or regulator valve spring may fly out causing injury.
NOTE
For transmissions with serial numbers 21628 and higher, use two
adapters with spring compressor.
Attach main regulator and lockup spring compressor to front support (5) and tighten two
8.
screws (23) to relieve spring compression.
NOTE
Perform steps 9 and 10 for transmissions with serial numbers
21628 and higher.
9.
Remove twelve self-locking screws (25) and two self-locking screws (24) and separate oil pump (19)
from front support (5). Mark location for installation. Discard self-locking screws (24) and (25).
Remove two cross pins (26) from front support (5).
10.
NOTE
Perform step 11 for transmissions with serial numbers prior to
21628.
Remove snaprings (10) and (11) from oil pump (19) and front support (5).
11.
Carefully remove and detach main regulator lockup spring compressor, valve stops (12) and (17),
12.
valve springs (13) and (16), regulator valve (15), and lockup valve (14) from front support (5). Mark
locations for installation. Tag valve springs (13) and (16) for installation.
NOTE
Perform step 13 for transmissions with serial numbers prior to
21628.
Remove twelve self-locking screws (25) and two self-locking screws (24) connecting oil pump (19) to
13.
front support (5). Separate oil pump (19) from front support (5). Mark location for installation and
discard self-locking screws (25) and (24).
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