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 TM 55-1905-219-14-1
BOW RAMP WINCH.
a. The Bow Ramp Winch (Figure 1-57) consists of a single drum with dual grooves wound opposite hand for two
7/8 inch diameter wire rope lines, mounted on the slow speed shaft of a helical gear reducer, with an outboard anti-friction
bearing. The outer flange of the drum has ratchet teeth which engage with a pawl pivoted in the Frame. The pawl is
engaged and disengaged by a hand lever which can be locked "IN" or "OUT". The inner drum flange is equipped with a
manually-operated hand brake. The Winch is driven by a motor connected to the reducer high speed shaft by a torque
limiting clutch coupling set for approximately 200% of the normal load. The motor has a spring-actuated solenoid-
released, disc brake, integrally mounted.
b. The Winch is controlled by a magnetic reversing starter, with a pushbutton operating station at Starboard on
the forecastle deck. There is a remote station in the Pilot House and a master station in the winch area. A slack cable
limit switch is provided to de-energize the motor in case the cable goes slack because of overtravel or in the event of a
"hang-up". A hand crank safety switch is also provided to prevent electrical operation when the hand crank is engaged.
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