TM-9-2350-311-20-2 Maintenance Manual Volume 2 for M109 Cab Download
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TM 9–2350–311–20–2 3–74 3–3 TROUBLESHOOTING — CONTINUED e. CAB HYDRAULIC SYSTEM — CONTINUED (4) HYDRAULIC PUMP MOTOR ON/OFF CYCLE IS RAPID. INITIAL SETUP Tools Artillery and turret mechanic’s tool kit (SC 5180–95–CL–A12) Recharge system and observe pressure gage during operation. Does hydraulic pump come on when pressure drops below 925 psi (6378 kPa) and shut off when pressure reaches 1225 psi (8446 kPa)? Charge main accumulator nitrogen pressure (para 19–4). Check nitrogen pressure in main accumulator (para 19–4). Is pressure 500 to 550 psi (3448 to 3792 kPa)? yes no yes no Notify support maintenance. END OF TASK A yes no Replace pressure switch (para 6–6). If malfunction still persists, notify support maintenance. B C Check fluid level of hydraulic power pack (para 6–2). Is fluid level low? Add fluid (para 6–2).