TM-9-2350-311-20-2 Maintenance Manual Volume 2 for M109 Cab Download
Page 332 of 828
TM 9–2350–311–20–2 6–16 Change 2 6–3.1 EQUILIBRATED ELEVATION MECHANISM ASSEMBLY — CONTINUED b. Bleeding WARNING Bleed valves may have high pressure when first opened. Use caution when opening valves to avoid injury. 1 Open bleed valves (8 and 9) on elevating cylinder (10). 2 Place ELEVATION CONTROL switch (3) to NO. 1 MAN position. 3 Pull back slowly on assistant gunner’s control handle (11) until air-free hydraulic fluid flows from bleed valve (8). Then close bleed valve. 4 Push forward slowly on assistant gunner’s control handle (11) until air-free hydraulic fluid flows from bleed valve (9). Then, close bleed valve. 5 Refill hydraulic power pack reservoir to FULL AFTER PUMPING mark (12) (para 6–3c.). 6 Ensure equilibrator valve knob (4) is closed on equilibrator manifold assembly (7). Make sure that howitzer tube is fully depressed. 7 Open rear bleed valve (13) on elevating cylinder (10). 8 Pump equilibrator hand pump (14) until air-free hydraulic fluid flows from rear bleed valve (13). Then close rear bleed valve. 12 3 14 13 8 10 9