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TM 55-1905-222-14
Section III. TECHNICAL PRINCIPLES OF OPERATION
1-12
PROPULSION SYSTEM.
1-12.1.
Propulsion. Machinery. The power for propulsion of the landing craft is provided by two V-12 Detroit Diesel
Engines and two Twin Disc Marine Transmissions Each engine and transmission form one propulsion unit as shown
below. The propulsion units rotate the propeller shafts In opposite directions. The starboard propeller shaft rotates
clockwise and the port propeller shaft rotates counterclockwise when viewed from the stern while moving ahead. The
propulsion units are controlled remotely by a Kobelt dual function,. single lever control head. mounted. in the pilothouse
control console. In addition, the propulsion units provide the power directly and indirectly to operate other systems.
Refer. to TM. 5-2815-231-14 for further information on the propulsion engines
1-12.2. Shafts and Propellers.
The propeller shafts are 2-1/2 inch diameter corrosion resistant steel. The
transmission couplings are flange type with taper bore. Each shaft is supported by a cutlass bearing in a V- strut and
shaft lug. The bearings are Installed with light push fit and are secured with hex head cap screws. The stuffing boxes
are rubber neck type with heavy duty hose and hose clamps. The propellers are keyed to the trailing tapered shaft end,
and are secured to the shaft with a jam nut, plain nut and cotter pin.
1-16
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