TM-9-2350-238-34-2

CRANE (CAB) COMPONENTS, RECOVERY VEHICLE, FULL TRACKED: LIGHT, ARMORED, M578

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL

APRIL 1992

TM-9-2350-238-34-2 - Page 197 of 327

TM 9-2350-238-34-2

2-39. MAINTENANCE OF PRESSURE RELIEF VALVE 12253778-1 AND PRESSURE

RELIEF VALVE 12253778-2 (CONT).

ADJUSTMENT OF CHECK VALVE (CONT)

9

10

11

Adjust pressure for check valve (5) to

between 2100 and 2300 psi (14,480

and 15,859 kPa) by turning screw (6)

counterclockwise to decrease pressure or

clockwise to increase pressure.

When correct pressure adjustment is ob-

tained, tighten nut (4).

If correct pressure adjustment cannot be

obtained, replace check valve (5). Refer

to page 2-154.

ADJUSTMENT OF BOOM CYLINDER

PRESSURE RELIEF VALVE

OIL PRESSURE

TESTER

1 Perform adjustment of check valve pro-

cedure.

2 Loosen nut (1) on boom cylinder pres-

sure relief valve (2).

3 Adjust pressure for boom cylinder pres-

sure relief valve (2) to between 1950

and 2050 psi (13,445 and 14,135 kPa)

by turning screw (3) counterclockwise to

decrease pressure or clockwise to in-

crease pressure.

4 When correct pressure is obtained,

tighten nut (1).

5 If correct pressure adjustment cannot be

obtained, replace boom cylinder pressure

relief valve (2). Refer to page 2-154.

6 Push BOOM cylinder control handle (4)

to LOWER until boom is in stowed

position.

7 Turn off hydraulic system. Refer to TM

9-2350-238-10.

2-184