TM-9-1240-401-34&P Technical Manual for M109 Telescopes and Mounts Download
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2-4 TM 9-1240-401-34&P I Section Ill. Troubleshooting I I 2-7. GENERAL I a. The symptom index can be used as a quick guide to troubleshooting. Common malfunctions are listed in alpha- betical oder with page number reference to the troubleshooting table, where a test or inspection and corrective action are provided. b. The direct support troubleshooting table (ref. para 2-9) lists the common malfunctions which maybe found dur- ing maintenance of the M146 telescope mount. Perform the tests/inspections and corrective actions in the order listed. c. This manual cannot list all malfunctions that may occur, nor all tests or inspections and corrective actions. If a malfunction is not listed or is not corrected by listed corrective action, notify general support maintenance. I 2-8. DIRECT SUPPORT SYMPTOM INDEX Troubleshooting Procedure (Page) BRACKET ASSEMBLY Elevation bracket does not slide freely . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...2-5 M146 TELESCOPE MOUNT Deflection knob is erratic and rough during movement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...2-8 Elevation knob is erratic and rough during movement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...2-5 Tapered pin (king pin) binds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...2-5 Yoke cannot be rotated through 180 degrees without binding . . . . . . . . . . . . . . . . . . . . . . . . . . . ...2-5 CABLE ASSEMBLY Cable assembly receptacle does not provide power for the Ml 18A2/M1 18A3 elbow telescope . ...2-6 I