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 1316 of 1364

TM 9-2350-238-20-1

F-28. SUSPENSION LOCKOUT HYDRAULIC SUBSYSTEM.

Functions/Description.

a.

The suspension lockout hydraulic

one side of the cylinder piston to the other.

subsystem forms a hydrostatic lock within

The pressure switch (8) is closed when

each lockout cylinder (3). This stops up and

pressure in the lockout cylinder is over 120

down movement of the road wheels and

psi (827 kPa), lighting the SUSPENSION

provides a solid hoisting platform.

LOCKED indicator lights. When the hydrau-

lic pressure drops below 95 psi (655 kPa),

b.

Lockout cylinders (3) are locked by

the pressure switch (8) opens, putting out

setting the selector control valve (5) to

the SUSPENSION LOCKED indicator lights.

LOCKED. Hydraulic fluid at 1600 to 2400

psi (11,032 to 16,548 kPa) flows through

c.

The subsystem is protected from

the valve (5) to the valve (6). The valve (6)

overpressure by the relief valve (2), which

reduces the fluid pressure to 150 psi (1034

bypasses fluid over 240 psi (1 655 kpa)

kPa). As the fluid pressure builds up in the

back to the reservoir. The cylinders (3) are

lockout cylinders (3), the lockout pistons

unlocked by setting the valve (5) to

are forced into the lockout position. This

UNLOCKED. This allows the hydraulic fluid

prevents hydraulic fluid from passing from

to flow back to the reservoir.

F-52