TM 55-1930-203-10
(b) Release the brake lever (2).
(c) Slowly depress speed lever (1) to haul in the winch cable. To increase the speed, depress the lever further. Releasing the lever
will automatically stop the winch.
(3) Free spooling, proceed as follows:
(a) Place shift lever (3) in neutral (vertical position).
(b) Pull out on free spooling control (4). This disengages a gear type clutch and allows the cable drum to free spool.
(c) Slowly release the brake (2) and the winch will free spool.
(d) Push in on control (4) to resume winching operations.
2-44. Fire Extinguishers
The LARC is equipped with two portable 15-pound carbon dioxide fire extinguishers; one in each machinery space at the gathering
box and one portable 5-pound carbon dioxide fire extinguisher installed in the cab.
CAUTION
When fighting a fire, do not stop the discharge of the extinguisher too soon. Coat
entire surface involved in the fire. The coating will check incandescence and prevent
reflash.
a. Operation of 15-Pound Extinguisher.
(1) Remove fire extinguisher from holder.
(2) Carry the extinguisher in an upright position and approach the fire as closely as heat permits.
NOTE
Fight the fire from the windward side if possible, so that the wind will blow heat away from the operator and at
the same time carry the carbon dioxide over the fire.
(3)
Remove the locking pin from the valve.
(4)
Raise nozzle on extinguisher and hold close to base of flame as possible.
(5)
Squeeze the release lever and at the same time move nozzle back and forth across base of flame.
(6)
Release the lever to close the valve as soon as conditions permit.
NOTE
The valve can be opened and closed repeatedly, if necessary.
(7) When continuous operation is desired, the D-yoke ring on the carrying handle is slipped over the operating lever to hold it
depressed.
b. Operation of 5-Pound Extinguisher.
(1) Remove fire extinguisher from holder.
(2) Carry the extinguisher in an upright position and approach the fire as closely as heat perm its.
NOTE
Fight the fire from the windward side if possible so that the wind will blow heat away from the operator and at
the same time carry the carbon dioxide over the fire.
(3) Raise nozzle on extinguisher and hold close to base of flames as possible.
(4) Open the valve by turning the hand wheel to the left, and at the same time, move nozzle back and forth across base of flame.
(5) Close valve as soon as conditions permit.
NOTE
Valve can be opened and closed repeatedly, if necessary.
2-45. Cab Heater
The LARC cab is equipped with a hot water heater (27, sheet 3, fig. 2-1) for windshield defrosting and for heating the cab. The
defroster control (26) is used to vary the amount of air flow to the windshield. A toggle switch located on the circuit breaker panel
(25) turns the heater fan on and off.
2-46. Spot and Trouble Light
The LARC is equipped with two spot and trouble lights, one in the cab and one in the starboard wing compartment. Each light is
attached to a 25-foot cord stowed on a self-winding reel. These lights have a trigger handle so that they can be used as blinker lights.
Section V. OPERATION UNDER UNUSUAL CONDITIONS
2-47. Cold Weather Operation
a. General. The LARC is designed for operation at any time in hot or cold climates. However, it requires special care in cold
weather. If temperatures below freezing ( +32 F. (0C)) are expected, make certain that the following procedures are performed.
b. Cooling System.
(1) Request that cooling system be drained and Rushed.
(2) Request that an antifreeze solution be added to the cooling system.
NOTE
At temperatures below -60 . (-51 .), arctic
F
C
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