SectIon Ill. REPAINTING AND REFINISHING INSTRUCTIONS

WARNING SectIon Ill. REPAINTING AND Observe all cautions, and warnings on contain- ers when using consumables. When applicable, wear necessary protective gear during han- dling and use. If a consumable is flammable or explosive MAKE CERTAIN the consumable and its vapors are kept away from heat, sparks, and flame. MAKE CERTAIN the helicopter is properly grounded and firefight- ing equipment is readily available prior to use. 4-4. Cleaning Instructions. a. Remove dust and loose dirt with a clean, soft cloth. (Item 4, Appendix D). b. Remove grease, fungus, and ground-in dirt with cloth dampened with dry-cleaning solvent, (Item 3, Appendix D). TM 55-4920-410-13&P REFINISHING INSTRUCTIONS c. 4-5. a. Remove moisture with a dry cloth. Repainting and Refinishing instructions. NOTE Refer to TB 746-10, Field Instructions for Painting and Preserving Electronics Equipment. Repaint test set using these colors: (1) Case (Exterior). Finish with two coats of yellow baked enamel, (Item 1, Appendix D). (2) Front Panel. Retouch using instrument black enamel, (Item 2, Appendix D). Section IV. Maintenance and Replacement of Authorized Parts 4-6. General. a. The only authorized replacement of parts by aviation unit personnel (AVUM) is indicated in Appendix B, Main- tenance Allocation Chart, or as indicated in paragraphs 4-7 thru 4-10. b. Authorized repair of the Analyzer Test Set by Avi- ation Intermediate Maintenance (ATST) personnel is indi- cated in Appendix B, Maintenance Allocation Chart. NOTE Aviation Intermediate Maintenance. Area TMDE Support Team (ATST) will perform the only authorized AVIM level of maintenance. This includes replacement and repair of com- ponents and end items which can be accom- plished efficiently with available skills, tools, and test equipment. Evacuate circuit boards, components, and end items beyond repair capability of ATST to the Depot. 4-7. Indicator Lamp Replacement. a. Unscrew bezel (Figure 4-1) from light assembly. b. Using a pushing and twisting motion, free bayo- net base of lamp from light assembly. c. Using a pushing and twisting motion, install bayonet base of replacement lamp into light assembly. d. Screw bezel onto light assembly. NOTE If lamp does not light now, trouble is in front panel. Send test set to higher level main- tenance. 4-8. Knob Replacement. a. Loosen screw holding knob to shaft. b. Slide knob off shaft. c. When placing new knob on shaft, make certain knob is fully on shaft before tightening screw. 4-9. Cable Assembly. Remove cable assembly from test set case and send to higher maintenance. 4-10. Lubrication. No lubrication is required. NOTE Performance checks are performed with single phase 115 vat, 400 Hz power and 28 vdc. 4-3