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 719 of 775

TM 9-2350-311-10

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LUBRICATION INSTRUCTIONS - CONTINUED

11.

VARIABLE RECOIL ASSEMBLY AND BUFFER ASSEMBLY (C)

To bleed variable recoil assembly and buffer assembly:

a.

b.

c.

d.

e.

f.

g.

Depress cannon assembly to maximum depression. Loosen right-hand bleeder plug (30) to bleed trapped air from

rear of buffer assembly (31). When air-free fluid flows, tighten right-hand bleeder plug.

Elevate cannon assembly to 50 mils. Loosen left-hand bleeder plug (32) to bleed trapped air from front of buffer

assembly (31). When air-free fluid flows, tighten left-hand bleeder plug.

Install hose before bleeding, then remove and stow in oddment tray after usage.

Elevate cannon assembly to 180 mils; open bleeder valve (33). When air-free fluid flows from hose, tighten bleeder

valve.

Check replenisher accumulator assembly (28) pressure gage (26) for 17 to 24 psi (117 to 165 kPa).

If low, add hydraulic fluid, OHT (item 20, Appx D) to correct operating range. If overfilled, drain.

Rebleed system until all air is bled from replenisher accumulator assembly (28) and mount. Check for fluid leaks.

Change 2

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