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 369 of 828

TM 9–2350–311–20–2

Change 2

6–47

3

Screw nipple (4) into side hole of air line filter (3) and attach to fitting (5).

4

Install new preformed packing (8) and hygroscopic breather (6) or hygroscopic breather (6.1) on fitting (5).

5

Install adapter (1) with attaching tube (2) to air line filter (3).

6

After installation, check hydraulic fluid level (para 6–2).

c.

Service

NOTE

•

This procedure applies only to the hygroscopic breather. The hygroscopic breather has a clear

plastic container which may be removed from the breather base for service.

•

Perform service procedures to replace the desiccant when the desiccant turns pink.

1

Remove hygroscopic breather (12) from breather base (13).

CAUTION

Be careful not to damage or stretch inlet flapper during removal.

2

Remove inlet flapper (14), foam (15), dessicant (16), and foam (17).

3

Using a clean dry rag, wipe away any residual moisture from hygroscopic breather (12), inlet flapper (14),

and foam (15 and 17).

CAUTION

Be careful not to damage or stretch inlet flapper during installation.

4

Install foam (17), new dessicant (16), foam (17), and inlet flapper (14).

5

Install hygroscopic breather (12) to breather base (13).

2

1

3

4

5

10

11

9

8

7

6

6.1

12

14

15

16

17

13