APPENDIC F: HYDRAULIC SYSTEM DESCRIPTION AND SCHEMATIC DIAGRAMS

9-2350-238-20-2

APPENDIX F

HYDRAULIC SYSTEM DESCRIPTION

AND SCHEMATIC DIAGRAMS

F-1.

G E N E R A L . This appendix contains functional descriptions and schematic diagrams of the

hydraulic

system.

The

hydraulic

system

divided

into

eight

basic

subsystems:

hydraulic

power,

boom winch,

traversing,

boom

cylinder,

tow

winch,

impact

wrench,

spade,

and

suspension

lockout.

The M578 Recovery Vehicle has an open-center type hydraulic system. This means that the

hydraulic

fluid

continuously

circulates

through

the

main

hydraulic

supply

lines.

When

hydraulic subsystem is being used, the hydraulic fluid pressure in the main supply lines is near

zero. When a subsystem is used, hydraulic fluid from the main supply lines is diverted through

the subsystem. Hydraulic fluid pressure builds up within the subsystem to a level high enough

for the subsystem to function. Preset pressure relief or pressure reduction valves protect the

subsystem

from

too

much

pressure.

F-2.

HYDRAULIC

SYMBOLS.

F-1