TM-9-1240-401-34&P Technical Manual for M109 Telescopes and Mounts Download
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TM 9-1240-401-34&P 5.1-10. DIRECT SUPPORT TROUBLESHOOTING - continued MALFUNCTION TEST OR INSPECTION LOCATION CORRECTIVE ACTION COVER ASSEMBLY - continued 4. COUNTER WINDOWS (3) ARE FOGGED OR HAVE CONDENSATION. Check for damaged glass and defective or missing parts. a. Replace glass if required (ref. para 5.1-16). b. Replace defective or missing parts as required and authorized (ref. para 5.1-16). c. Remove cover assembly. Wipe dry, then purge and charge M15 quadrant with dry nitrogen after reinstalling cover (ref. TM 750- 116). CORRECTION KNOB ASSEMBLY 5. CORRECTION KNOB (4) BINDS. Check for defective correction knob assembly. a. Repair correction knob assembly (ref. para 5.1-15). b. If correction knob still binds, notify general support maintenance. COUNTER ASSEMBLY 6. CORRECTION COUNTER FAILS TO ALLOW +50 MILS MIN OR -50 MILS MIN. Step 1. Check for incorrect assembly of key washers after repair. Reinstall key washers correctly (ref. para 5.1-15). Step 2. Check for worn or damaged correction knob assembly. Replace worn or damaged parts as required (ref. para 5.1-15). 5.1-12 Change 1