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 490 of 552

TM 9-2350-311-34-2

14-6 SAFETY RELIEF VALVE ASSEMBLY - CONTINUED

d. Assembly

1 Install relief valve seat (18) and valve piston (17) in relief valve plate (8).

2 Install new preformed packing (13) on plug (12).

3 Position helical compression spring (3) on relief valve seat (18).

4 Install solid discs (14 and 15), if previously used, and plate spacer (16) on plug (12).

Force required to compress helical compression spring is 143 pounds (65 kg). Wear eye protection

and make provision to contain parts when compressing helical compression springs to prevent inju-

ry.

5 Install plug (12) with solid discs (14 and 15) and plate spacer (16), over end of helical compression spring

(3). Compress helical compression spring and thread plug completely into relief valve plate (8).

6 Repeat steps 1 through 5 for remaining side of safety relief valve assembly (2).

14-30