TM-9-2350-311-34-2 Maintenance Manual for Volume 2 M109 Cab Download
Page 80 of 552
TM 9-2350-311-34-2 2-22 QUICK GUIDE TO TROUBLESHOOTING - CONTINUED 2-22.3 General Troubleshooting Procedures Refer to the samples below and follow these instructions for using the QUICK GUIDE TO TROUBLESHOOTING (sample A) and troubleshooting procedures (sample B). a. Determine the symptom. b. Locate the symptom (1) in the Quick Guide to Troubleshooting. c. Locate the troubleshooting paragraph (2) reference for your symptom or maintenance action. d. Turn to the troubleshooting procedure (3) identified in the Quick Guide to Troubleshooting. e. Study the function description, pictorial view, and electrical schematic located at the beginning of each section. f. Perform corrective action (4) as required by troubleshooting procedure. g. Verify that the corrective action eliminated the symptom. SAMPLE A QUICK GUIDE TO TROUBLESHOOTING - CONTINUED ITEM SYMPTOM PARAGRAPH CANNON JERKY RECOIL. CAB HYDRAULIC SYSTEM HYDRAULIC PUMP MOTOR OPERATES WHEN MASTER SWITCH IS ON AND CAB POWER SWITCH IS OFF. Replace electromagnetic relay in power relay box assembly. 8-12 SAMPLE B 3-3 TROUBLESHOOTING CHART - CONTINUED b. CANNON - CONTINUED (1) JERKY RECOIL. Depress cannon to zero mils and inspect muzzle brake (TM 9-2350-311-10). Are cracks more than one inch long present? Replace muzzle brake (TM 9-2350-311-10). Check hydraulic pressure on replenisher pressure gage after mount has cooled (TM 9-2350-311-10). Is replenisher pressure 17-24 psi (117.215-165.48 kPA)? 2-18