TM-9-2350-311-20-2 Maintenance Manual Volume 2 for M109 Cab Download
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TM 9–2350–311–20–2 3–54 Change 2 3–3 TROUBLESHOOTING CHART — CONTINUED d. ELEVATING SYSTEM — CONTINUED (3) CANNON DOES NOT ELEVATE OR DEPRESS SMOOTHLY. INITIAL SETUP Tools Artillery and turret mechanic’s tool kit (SC 5180–95–CL–A12) References TM 9–214 Inspect bearings in elevating cylinder eyes (TM 9–214) and elevation pivot pins. Do bearings or pins need replacement? A Check nitrogen precharge in primary accumulator (para 19–5). Is pressure abnormal? Bleed air from equilibrated elevation hydraulic system (para 6–3.1). Will cannon elevate and depress smoothly? yes no yes no B C Charge primary accumula- tor (para 19–5). Perform leak test (para 6–11). Verify fault is corrected. Con- tinue normal operations. yes no Notify support maintenance. CONTINUED ON NEXT PAGE EQUILIBRATED ELEVATING CYLINDER SECONDARY ACCUMULATOR PRIMARY ACCUMULATOR BEARING BEARING