TM 9-2320-387-24-2
28-13.
TURBINE SHAFT AND OVERDRIVE CARRIER ASSEMBLY REPAIR
This task covers:
a. Overdrive Unit Disasssembly
f.
Overdrive Carrier Measurement
b. Overrun Clutch Disassembly
g. Overdrive Carrier Cleaning
c. Overrun Clutch Cleaning
h. Overdrive Carrier inspection
d. Overrun Clutch Inspection
i.
Turbine Shaft Inspection
e. Overrun Clutch Assembly
j.
Overdrive Unit Assembly
INITIAL SETUP:
Tools
Materials/Parts
General mechanic’s
tool kit:
automotive (Appendix B, Item 1)
Dial indicator (Appendix B, Item 113)
Special Tools
Clutch spring compressor
(Appendix
B, Item 69)
Adapter (Appendix B, Item 67)
Seal installer (Appendix B, Item 72)
Two seals (Appendix G, Item 381)
Two seals (Appendix G, Item 380)
?kansmission
fluid (Appendix C, Item 37)
Manual References
TM 9-2320-387-24P
Equipment Condition
Transmission
disassembled
into subassemblies
(para. 28-3).
Maintenance
Level
General support
NOTE
Work area should be well-ventilated,
clean, and free from blowing dirt and dust.
a. Overdrive Unit Disassembly
1.
Remove snapring (1) and turbine shaft (4) from overdrive carrier assembly (2).
2.
Remove four seals (5) from shaR (4). Discard seals (5).
3.
Separate overdrive carrier assembly (2) from overrun clutch housing assembly (3).
b. Overrun Clutch Disassembly
1.
Remove snapring (61, backing plate (7), three clutch plates (121, and clutch plate assemblies (8) from
clutch housing (3).
2.
Using spring compressor and adapter, compress spring and retainer assembly (10) and remove snapring (9).
3.
Remove spring compressor and adapter, spring and retainer assembly (lo), and piston (11) from
housing (3).
c. Overrun Clutch Cleaning
Clean all overrun clutch components, except piston (111, in accordance with para.‘2-14.
d. Overrun Clutch Inspection
1.
2.
3.
4.
5.
28-48
Inspect all clutch plates (12) and (8) for cracks, breaks, scoring, pitting, and evidence of overheating
or composition wear. Replace clutch plates (12) and clutch plate asssemblies (8) as a set if any are
damaged.
Inspect backing plate (7) for cracks, warpage, and scoring. Remove minor scoring. Replace plate (7) if
damaged.
Inspect spring and retainer assembly (10) for cracks, breaks, and uneven or damaged springs.
Replace springs if damaged.
Inspect piston (11) for crack or damage. Replace piston (11) if damaged.
,.
Inspect housing (3) for cracks, chips, scored or burned thrust faces and plugged holes. Unplug holes.
Replace if damaged.
