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 TM 55-1905-223-24-2
This task covers: a. Removal, b. Repair, c. Replacement.
INITIAL SETUP
Tools
Equipment Condition
Deep well sockets, 1/2 inch drive,
TM 55-1905-223-10, Engine secured,
12 pt, 10 mm through 27 mm,
tagged "Out of Service, Do Not Operate."
5120-01-113-8078
TM 55-1905-223-24-18, Propeller shaft
Allen wrenches, 2 mm through 9 mm,
disconnected from gearbox.
5120-01-087-3616
Overhead wiring and piping removed and
Combination wrench set, metric
tagged with WARNINGS.
10 mm through 24 mm,
Refer to the following paragraphs in
5120-01-046-4979
this maintenance manual:
Lifting sling P/N 3375958
Gearbox drained (para. 2-5).
Dial indicator, 5210-00-277-8840
External hardware removed (para. 2-14).
Hydraulic press P/N 2009-13
Fluid transmission cooler removed (para. 2-17).
Torsional coupling removed (para. 2-21).
Materials/Parts
General Safety Instructions
Main Reduction gear
P/N WAV-850 PT, WAV-850SB
Use the right lifting equipment;
Warning tags, Item 12, Appendix C
the gearbox weighs 4,472 pounds.
WARNING
The gearbox and its components are extremely heavy. To avoid injury or death,
make sure that suitable lifting equipment and qualified riggers are used during
removal and replacement.
WARNING
Make sure a minimum of three soldiers are assigned to assist in removal and
replacement of the gearbox.
Change 1
3-4
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