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 TM 55-1905-220-14-1
1-44. PROPELLER SHAFTS AND MISCELLANEOUS COMPONENTS.
a. All propulsion shafting is forged steel. The shafts are: Stub Shaft (port/starboard), Outboard Shaft (port/starboard);,
Line Shaft (port only). Those sections of shafting, which are exposed to sea water, are protectively coated by the Cordo
Bond Strong Back Method, consisting of liquid resins combined with glass tape. Fairwater voids are filled with tallow.
b. Taper-bored couplings are provided between the port stern tube shaft and line shaft. They are also provided at the
drive end of the port line shaft and starboard stem tube shaft.
c. A bulkhead stuffing box for the port line shaft is located at Frame 56, port. The stuffing boxes are cast steel with cast
steel glands, bronze studs, and are packed with lubricated flax packing and provided with grease cup lubrication. The
stuffing box is easily reached from both sides of the bulkhead. The stuffing box glands should be checked daily when the
ship is in operation, and tightened as required. When the gland can no longer be tightened, remove gland packing and
repack.
d. The stern tube shafts are located at Frame 62-1/2, port and starboard. They come provided with Split Syntron water-
lubricated seals. The gasketed seal flange is bolted to the stern tube flange. A spare seal ring is housed in the forward
section of the seal. An inflatable ring is included to allow replacement of the sealing elements with the vessel
waterborne. The ring,-,normally unpressurized, is inflated to form a watertight seal around the static shaft.
e. A 2-1/2 gallon (9.46 1) fresh water storage tank for each seal is attached to the aft engine room bulkhead above the
seal. Each tank is fitted with a globe valve and connecting line to the respective seal. Tanks are provided with hinged
covers for pour-type filling.
f. A portable shaft locking device is provided for each of the propulsion shafts, so that either shaft may be secured
when the vessel is under way on one propulsion unit, or while being towed at a speed of 11 knots. The locking plate is
stowed in an inverted position on the propulsion unit foundation below the shaft coupling.
g. If the propeller shafts are allowed to turn while being towed, or when operating on one propulsion unit, the reduction
gear standby lubricating oil pumps must be put into operation.
h. The propellers are mounted to the respective stub shaft flanges and rotate within the Kort nozzles. Propeller hubs are
fitted with fairwater cones and steel plate rings. Rope guards are provided on the aft end. The units are right and left
hand arranged to rotate outboard looking from the top.
1-74
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