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 713 of 775

TM 9-2350-311-10

G-3 LUBRICATION INSTRUCTIONS — CONTINUED

4.

POWER PACK ASSEMBLY RESERVOIR (C)

Before operation, check fluid level in sight gage (7). If pressure gage (8) reads zero, fluid level in sight gage should be up

to FULL AT ZERO PRESSURE mark (9). If pressure gage reads between 925 and 1225 psi (6378 and 8446 kPa), the

hydraulic system is fully charged and fluid level should be up to FULL AFTER PUMPING mark (10).

NOTE

For accurate reading on power pack gage, perform zero pressure check (para 3-6.4).

To check hydraulic fluid:

a. Remove cap screw (11), flat washer (12), and towing cable strap (13) from cab roof.

b. Remove four cap screws (14), four flat washers (15), and access cover (16) with gasket (17) from cab roof.

c. Unscrew and remove power pack gage (18) from top of reservoir and note reading on power pack gage. Hydraulic

fluid should be level with FULL AT 0 PRESSURE mark (19) on power pack gage. Add hydraulic fluid, OHT (Table

G-1) to reservoir, if needed, and check level again with power pack gage.

G-9