TM-9-2350-311-34-2

CAB, ARMAMENT, SIGHTING AND FIRE CONTROL, ELEVATING AND TRAVERSING SYSTEMS AND ASSOCIATED COMPONENTS HOWITZER, MEDIUM, SELF-PROPELLED, 155MM

TECHNICAL MANUAL; DIRECT AND GENERAL SUPPORT MAINTENANCE MANUAL

SEPTEMBER 1994

TM-9-2350-311-34-2 - Page 305 of 552

TM 9-2350-311-34-2

5

Apply hydraulic pressure to PRESSURE port (16) increasing from 0-3300 psi (0-22754 kPa). Valve (3)

should open at 3200 ± 100 psi (22064 + 690 kPa). Opening of valve is indicated by flow from RET port (15).

6

Remove lockwire (1).

7

Loosen outer nut (2) by turning counterclockwise.

8

To increase opening pressure, rotate adjusting screw (17) clockwise with a hex key. To decrease opening

pressure, rotate adjusting screw counterclockwise.

9

Tighten outer nut (2).

10

Measure valve (3) opening pressure (step 5). Repeat steps 6 through 10 as necessary until opening pres-

sure of 3200 ± 100 psi (22064 ± 690 kPa) is obtained.

11

When proper pressure setting is obtained, install new lockwire (1) to secure outer nut (2) to valve (3).

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