TM-9-2350-311-10
HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5
TECHNICAL MANUAL; OPERATOR’S MANUAL
NOVEMBER 1994
TM-9-2350-311-10 - Page 449 of 775
TM 9--2350--311--10
Change 4
3--49
3--6
ARMAMENT AND CAB MAINTENANCE — CONTINUED
3--6.4
Zero Pressure Check and Checking, Filling, and Draining Power Pack — Continued
Procedure — Continued
15
Install power pack gage (15).
16
Install access cover (16) with gasket (17) on cab roof (18) and secure with four flat washers (19) and
four cap screws (20).
17
Secure tow cable (21) to cab roof (18) with towing cable strap (22), flat washer (23), and cap screw
(24).
18
Reconnect wire 645 (6).
19
Turn MASTER switch (1) and CAB POWER switch (2) to ON to charge the main hydraulic system.
20
The pressure gage (3) needle (9) will move from zero and stop between 1175 and 1275 psi (8102 and
8791 kPa).
21
If nitrogen pressure is low, use manual operation only. Notify unit maintenance as soon as possible.
15
16
18
19
20
21
22
23
24
6
2
3
9
1
17
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