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 1308 of 1364

TM 9-2350-238-20-1

F-22. IMPACT WRENCH HYDRAULIC SUBSYSTEM.

Functional Description.

a.

Hydraulic fluid power for the opera-

tion of the impact wrench is supplied by

the 8 gpm pump of the hydraulic power

subsystem.

b.

The impact wrench hydraulic sub-

system is a continuous flow system, which

allows return fluid from the impact wrench

to continue on to the spade hydraulic sub-

system, During impact wrench operation,

the impact wrench is connected to the flow

control manifold by means of flexible hoses

and quick-disconnect couplings.

c.

Pulling out the two-way valve (1)

allows hydraulic fluid to flow through the

flow control valve (2), through quick-

disconnects (4) and the extension hose (5),

and on to the impact wrench. Then by

pressing the control trigger of the selector

valve (6), hydraulic fluid passes through the

directional control valve (7) to the hydraulic

motor (8). The hydraulic motor (8) rotates

in either a clockwise or counterclockwise

direction, depending upon the setting of the

directional control valve (7). The speed of

the hydraulic motor (8) is controlled by ad-

justing the flow control valve (2).

F-44