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 184 of 828

TM 9–2350–311–20–2

3–73

1.

Place utility pail under sight gage drain.

2.

Drain hydraulic fluid by removing plug and

turning pointer handle to DRAIN position.

3.

Check hydraulic fluid in tube on sight gage.

4.

Close drain when hydraulic fluid reaches FULL

AT 0 PRESSURE mark.

5.

Verify hydraulic fluid level by checking power

pack gage.

6.

Fully charge hydraulic system (para 6–3).

7.

Discharge pressure in hydraulic system (para

6–3).

Does fluid overflow from top of sight gage?

Charge main accumulator

nitrogen (para 19–4). If

malfunction persists, notify

support maintenance.

Verify fault is corrected.

Continue normal

operations.

POINTER

HANDLE

SIGHT

GAGE

PLUG

END OF TASK

yes

no

B

CONTINUED FROM STEP A