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 TM 55-1905-220-14-4
3-56.
SHAFT SEALS - MAINTENANCE INSTRUCTIONS.
a. The Marine Split Shaft Seal is constructed of a sectional marine bronze housing casting which houses
two flexible sealing elements and a split inflatable sealing ring. The housing is designed to facilitate installation
and simplify maintenance and replacement of the sealing elements.
b. In the forward section of the assembly are installed two split sealing elements. The sealing elements
are held in contact with the shaft by encircling garter springs. As a result of the contact, the sealing elements
revolve with the shaft. However, actual sealing is accomplished only by the forward sealing element. The
vertical surface contacts the lapped face of the seal gland ring. The aft sealing element acts as a spacer ring
and is available as a replacement element when interchange is required.
c. The sealing contact is lubricated by a slight flow of clean water, which is injected through the gland ring,
into a provided recess in the forward sealing element.
This task covers:
a. Inspection
c. Disassembly
b. Service
d. Installation
INITIAL SETUP :
Test Equipment
References
None
Refer to paragraph 3-55 for
inflation and deflation procedures
Equipment
Special Tools
Condition Condition Description
None
None
Material/Parts
Special Environmental Conditions
MEK (Methy-ethyl-ketone)
None
Goodyear Pliobond No.20
Cement or equivalent
Cup of grease
Personnel Required
General Safety Instructions
1
Observe all CAUTIONS AND WARNINGS
in these procedures. Failure to do so
can result in loss of life and loss of
the Landing Craft.
3-989
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