TM-9-2350-311-20-2 Maintenance Manual Volume 2 for M109 Cab Download
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TM 9–2350–311–20–2 Change 2 3–3 3–2.3 Quick Guide to Troubleshooting List ITEM SYMPTOM PARAGRAPH BREECH MECHANISM BREECH DOES NOT OPEN MANUALLY. 3–3a. (1) BREECH DOES NOT CLOSE COMPLETELY. 3–3a. (2) BREECH DOES NOT OPEN AUTOMATICALLY AFTER FIRING. 3–3a. (3) CANNON JERKY RECOIL. 3–3b. (1) EXCESSIVE RECOIL FORCE. 3–3b. (2) EXCESSIVE RECOIL TRAVEL AT HIGH ANGLE OF FIRE. 3–3b. (3) CANNON DOES NOT RETURN TO BATTERY. 3–3b. (4) PRIMER DOES NOT FIRE. 3–3b. (5) PRIMER NOT EJECTED PROPERLY. Replace cartridge extractor. 5–4 CAB FILLS WITH SMOKE OR GASES AFTER FIRING. 3–3b. (6) BORE EVACUATOR OR MUZZLE BRAKE THRUST COLLAR BECOMES LOOSE. Replace setscrew, spring, or bearing ball. 5–1 CAB TRAVERSING SYSTEM CAB WILL NOT TRAVERSE UNDER POWER OR MANUALLY, BUT HYDRAULIC PRESSURE IS NORMAL AND CAB LIGHTING OPERATES. 3–3c. (1) MANUAL TRAVERSE HANDWHEEL ROTATES WHILE TRAVERSING IN POWER. 3–3c. (2) CAB WILL NOT TRAVERSE UNDER POWER, MANUAL OPERATION IS NORMAL. 3–3c. (2.1) CAB TRAVERSES UNDER POWER, BUT TRAVERSE CONTROL INDICATOR LAMP DOES NOT LIGHT. 3–3c. (3) CAB WILL NOT TRAVERSE FREELY IN MANUAL OR POWER MODES. 3–3c. (4) CAB CREEPS. 3–3c. (5) ELEVATING SYSTEM CANNON DOES NOT ELEVATE OR DEPRESS UNDER POWER OR MANUALLY, BUT HYDRAULIC PRESSURE IS NORMAL. 3–3d. (1) CANNON MOVES BY ONLY ONE CONTROL HANDLE, BUT MANUAL OPERATION IS NORMAL. 3–3d. (2) CANNON WILL NOT MOVE UNDER POWER FROM EITHER CONTROL HANDLE, BUT MANUAL OPERATION IS NORMAL. Notify support maintenance. CANNON DOES NOT ELEVATE OR DEPRESS SMOOTHLY. 3–3d. (3) CANNON DOES NOT ELEVATE OR DEPRESS USING MANUAL ELEVATION SYSTEM OR SYSTEM IS INEFFICIENT, BUT CANNON WILL OPERATE UNDER POWER. 3–3d. (4) CAB HYDRAULIC SYSTEM POWER PACK HYDRAULIC PUMP MOTOR DOES NOT OPERATE, BUT CAB LIGHTING SYSTEM OPERATES NORMALLY. 3–3e. (1) HYDRAULIC PRESSURE IS NORMAL, BUT HYDRAULIC POWER IS NOT BEING SUPPLIED. 3–3e. (2) HYDRAULIC FLUID OVERFLOWS FROM TOP OF SIGHT GAGE OR CONTAMINATED CRYSTALS IN HYDROSCOPIC BREATHER. 3–3e. (3) HYDRAULIC PUMP MOTOR ON/OFF CYCLE IS RAPID. 3–3e. (4) HYDRAULIC PUMP MOTOR OPERATES WHEN MASTER SWITCH IS ON AND CAB POWER SWITCH IS OFF. Replace electromagnetic relay in power relay box assembly. 8–13