TM-9-2350-238-20-1

HULL AND RELATED COMPONENTS RECOVERY VEHICLE, FULL TRACKED: LIGHT, ARMORED, M578

TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL

MAY 1994

TM-9-2350-238-20-1 - Page 1302 of 1364

TM 9-2350-238-20-1

F-19. TOW WINCH HYDRAULIC SUBSYSTEM.

Functional Description.

a.

The hydraulic fluid power for the

d.

Moving the handle of the directional

operation of the tow winch is supplied by

control valve (1) in PAY OUT position has

the hydraulic power subsystem.

the same effect as in PAY IN except that

the hydraulic fluid is routed in the opposite

b.

The tow winch hydraulic subsystem

direction through the hydraulic motor (8).

controls the power for tow winch operation

The relief valve (10) controls the rate of

when pulling or releasing a load.

flow in the return line.

c.

Moving the handle of the directional

e.

When the handle of the directional

control valve (1) in the PAY IN position

control valve (1) is in the neutral position,

directs hydraulic fluid to release brake (7)

hydraulic fluid from both 40 gpm hydraulic

and operate the hydraulic motor (8) to

pumps flows through the open center port

retrieve the tow winch wire rope. Return

to the reservoir.

fluid from the hydraulic motor (8) flows

through the pressure relief valve (10) and

f.

If the boom winch is used at the

the directional control valve (1), then to the

same time that the tow winch is being

reservoir. The relief valve (4) limits hydrau-

used, the tow winch operation will be

Iic pressure when paying in to 2150 psi

slowed down in proportion to boom winch

(1 4,824 kPa) to protect winch components

use.

from overload.

F-38