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 327 of 828
TM 9–2350–311–20–2
6–11
b.
Draining Fluid
NOTE
•
Be sure the power pack pressure system has been discharged (para 6–3a.) before draining
hydraulic fluid.
•
Dispose of hydraulic fluid in accordance with local regulations.
1
Place a drain pan under tee on main return tube (8).
2
Loosen hex nut (9) and disconnect main return tube (8). Drain tube into drain pan.
3
Move assistant gunner’s control handle (10) back and forth to drain elevating tubes.
4
Loosen hex nut (11) and disconnect charging tube (12). Drain into drain pan.
5
Loosen elbow (13) and disconnect traversing motor drain tube (14). Drain into drain pan.
NOTE
Open bleed valves slowly to prevent hydraulic fluid and air from mixing.
6
Place a utility pail under each elevating cylinder bleed valve (15). Open elevating cylinder bleed valves and
drain.
7
Turn elevating hand pump (16) in both directions. Totally drain hydraulic system.
8
Close elevating cylinder bleed valves (15).
9
Connect main return tube (8), charging tube (12), and traversing motor drain tube (14). Tighten hex nuts (9
and 11) and elbow (13).
14
12
9
8
16
10
13
14
15
11
Back to Top
