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 TM 55-1905-223-24-2
MAINTENANCE OF MARINE REVERSE REDUCTION GEARBOX
This task covers: a. Removal, b. 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
Refer to the following paragraphs in this
Combination wrench set, metric
maintenance manual:
10 mm through 24 mm,
Gearbox drained (PMCS Item 9)
5120-01-046-4979
External hardware removed (para. 2-14).
Lifting sling P/N 3375958
Fluid transmission cooler removed (para. 2-17).
Strong back P/n 57864-850
Double changeover filter removed (para. 2-18).
Control valve removed (para. 2-20).
Torsional coupling removed (para. 2-21).
External input/intermediate shafts removed (para. 3-11).
General Safety Instructions
Use lifting sling.
REMOVAL
a. Remove bolts and washers (1) and bolts (3) andnuts (5) securing the casing.
b. Remove upper casing (2).
c.
Remove bolts (6 and 9), securing bearing yoke (8).
d. Remove the bearing yoke.
Change 1
44
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