TM 9-2320-387-24-2
28-5. TRANSMISSION
CASE MAINTENANCE
This task covers:
a. Cleaning
b. Inspection
INITIAL
SETUP:
Tools
General mechanic’s tool kit:
automotive (Appendix B, Item 1)
Special Tools
Seal installer (Appendix B, Item 61)
Materials/Parts
Crocus cloth (Appendix C, Item 22)
Manual References
TM 9-2320-387-24P
Equipment Condition
Transmission
disassembled
into subassemblies
(para. 28-3).
General Safety Instructions
l Protective clothing must be used when steam
cleaning.
l Compressed air for cleaning purposes will not
exceed 30 psi (207 kPa).
Maintenance Level
General support
a. Cleaning
NOTE
Work area should be well-ventilated,
clean, and free from blowing dirt and dust.
1.
Remove transmission
case (1) from transmission
holding fixture.
WARNING
When steam-cleaning,
protective clothing must be used. Failure to do this may
cause serious injury.
2.
Thoroughly steam-clean transmission case (1).
WARNING
Compressed air used for cleaning purposes will not exceed 30 psi (207 kPa). Use
only with effective chip guarding and personal protective equipment
(goggles/shield,
gloves, etc.).
3.
Blow all dirt and cleaning solution from transmission
case (1) with compressed air.
b. Inspection
1.
2.
3.
4.
5.
6.
7.
8.
9.
NOTE
For general inspection procedures, refer to para. 2-15.
Inspect all oil passages and bores for cracks, leaks, holes, and burrs. Use soft stone or crocus cloth to
remove burrs.
Use helicoils to repair damaged threads.
Inspect bores for holes or pits as leakage paths. Replace transmission
case (1) if holes or pits are
present.
Inspect anchor pins (4) for damage or looseness. Replace anchor pins (4) if damaged or loose.
Inspect internal splines, lugs, and snapring grooves for cracks, breaks, and burrs. Repair minor
burrs. Replace damaged transmission case (1).
Remove retaining ring (7) and replace seal assembly (6) using seal installer.
Inspect plugs (51, cooler fittings (21, and vent pipe (3). Replace damaged parts.
Inspect oil multilip seal (8) for damage. Replace if damaged.
Inspect bolt holes (9) for damage. Replace transmission
case (1) if holes (9) are damaged.
28-22
