TM-9-2350-311-20-2 Maintenance Manual Volume 2 for M109 Cab Download
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TM 9–2350–311–20–2 3–56 Change 2 3–3 TROUBLESHOOTING CHART — CONTINUED d. ELEVATING SYSTEM — CONTINUED (4) CANNON DOES NOT ELEVATE OR DEPRESS USING MANUAL ELEVATION SYSTEM OR SYSTEM IS INEFFICIENT, BUT CANNON WILL OPERATE UNDER POWER. INITIAL SETUP Tools Artillery and turret mechanic’s tool kit (SC 5180–95–CL–A12) Materials/Parts Hydraulic fluid OHT (item 21, Appx D) References TM 9–2350–311–10 Verify fault is corrected. Continue normal opera- tions. 1. Loosen two hex nuts (1) at ports M1 and M2. 2. Drain off pressurized fluids through manual elevation tubes (2) until bubble free fluid flows. 3. Tighten two hex nuts (1) to secure manual elevation tubes (2). 4. Rotate manual elevating hand pump counterclockwise until movement is detected in equilibrated elevating cylinder. 5. Bleed elevating cylinders (para 6–3.1). Does cannon move manually? yes no CONTINUED ON NEXT PAGE M1 M2 1 2 Verify fault is corrected. Continue normal opera- tions. yes no A Equilibrate elevating cylinder if necessary (TM 9–2350–311–10). Does system operate properly? B