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 325 of 828

TM 9–2350–311–20–2

Change 2

6–9

6–3

POWER PACK, HYDRAULIC (DRAINING, FILLING AND CHARGING)

This task covers:

a.

Discharging Pressure

b.

Draining Fluid

c.

Filling

d.

Charging

INITIAL SETUP

Tools

Artillery and turret mechanic’s tool kit

(SC 5180–95–CL–A12)

Drain pan (item 8, Appx H)

Utility pail (item 7, Appx H)

Materials/Parts

Caps and plugs (item 7, Appx D)

Hydraulic fluid, OHT (item 21, Appx D)

Equipment Condition

Tow cable and cab access cover removed (para 14–11)

Cab traverse lock locked (TM 9–2350–311–10)

Vehicle MASTER switch to OFF (TM 9–2350–311–10)

CAB POWER switch to OFF (TM 9–2350–311–10)

TRAVERSE CONTROL switch in MANUAL position

(TM 9–2350–311–10)

a.

Discharging Pressure

CAUTION

All hydraulic lines and ports must be capped to prevent contaminants from entering the hydraulic

system and causing internal damage to hydraulic components.

1

Disconnect wire 645 (1) at pressure switch (2) or at quick disconnect (3) near pressure gage (4).

4

1

3

2