TM-9-2350-311-20-2

HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5

TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL FOR CAB, ARMAMENT, SIGHTING AND FIRE CONTROL, ELEVATING AND TRAVERSING SYSTEMS AND ASSOCIATED COMPONENTS

DECEMBER 1993

TM-9-2350-311-20-2 - Page 738 of 828

TM 9–2350–311–20–2

19–30

19–6 ACCUMULATOR ASSEMBLY, SECONDARY — CONTINUED

b.

Service (Method Two)

WARNING

Be sure nitrogen cylinder contains only dry nitrogen. Certain other gases will cause nitrogen cylin-

der or secondary accumulator assembly to explode resulting in possible injury.

1

Remove two cap screws (1) and retaining strap (2).

2

Remove air valve cap (3) and loosen check valve nut (4) on valve (5) to release nitrogen precharge pres-

sure from secondary accumulator assembly (6).

3

Open and close nitrogen cylinder (9) shutoff valve (13) to clear shutoff valve seat of any dust or dirt.

4

Connect and tighten nitrogen charging assembly (7) to nitrogen cylinder (9), as shown. Repeat operation to

clear nitrogen charging assembly hose.

5

Connect air pressure gage assembly (16) to valve (5) on secondary accumulator assembly (6).

1

2

3

16

6

4

5

7