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 TM 55-1905-220-14-4
3-55.
SHAFT INFLATABLE SEAL - MAINTENANCE INSTRUCTIONS.
a. A feature of the marine split shaft seal is the split, inflatable sealing ring which is located in a recess in
the seal housing; just off of the sealing element cavity. The inflatable sealing ring, when not in use, does not
contact the shaft surface.
b. When it is necessary to interchange or replace the sealing element, the inflatable sealing ring is
inflated with air from an appropriate source, and forms a restriction around the stationary shaft, restricting sea
water ingress and permitting seal repair. After the interchange or replacement of the sealing elements is
completed, the inflatable ring is deflated, receding back into its recess, loosing contact with the shaft.
This task covers:
a. Inspection
c. Service
e. Inflation
b. Removal
d. Installation
f. Deflation
INITIAL SETUP :
Test Equipment
References
None
None
Equipment
Special Tools
Condition Condition Description
None
None
Material/Parts
Special Environmental Conditions
Inflation kit B-108387
None
Personnel Required
General Safety Instructions
1
WARNING
Observe all CAUTIONS and WARNINGS
in this procedure. Failure to do so can
result in loss of life and loss of the
landing craft.
3-981
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