TM 55-1930-203-10
raised or lowered. When the ramp is lowered this valve opens and allows air in the ramp seal to be exhausted into the atmosphere;
when the ramp is raised this valve closes. When the ramp is completely closed and latched, the starboard ramp latch lever (1) holds
the inflation quick-opening valve (2) in its open position to inflate the ramp seal with a maximum air pressure of 15 p.s.i. Air pressure
delivered to the ramp seal is indicated on air pressure gage (6). When the starboard ramp latch lever is released the inflation valve
automatically cuts off the air supply to the ramp seal. The plug valve (4) is used to isolate the ramp seal. Normally this valve should
be open to permit the flow of air. If the ramp is to remain in open position for 10 minutes or more, the plug valve should be used.
1 Latch lever
4 Plug valve, ramp seal shutoff (2)
2 Quick opening valve
5 Pilot air valve
3 Eye end fitting
6 Pressure gage
Figure 2-8. Starboard ramp controls
2-25. Winch Controls
a. General. The LARC is equipped with a hydraulically powered winch, located on the main deck aft of the cargo well. The winch,
controlled by three manually operated levers mounted between the winch and cab, is used to aid in loading and unloading cargo or to
lower and raise the anchor.
NOTE
A starboard engine must be operating before winch will be operative.
b. Speed Lever. The speed lever (1, fig. 2-9) operates a spring loaded valve that controls the flow of hydraulic fluid to the winch
motor. Depressing the lever actuates the motor. The farther downward the lever is moved, the faster the motor will operate. The
lever, when released, will automatically return to the off position and stop the motor.
2-18
