TM-9-6015 Aiming Post Lights M14, M41 and M43 Download
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easily on the pin (fig. 7) and the thumb nut locks firmly into the bracket. The thumb nut should thread easily on the screw tread which should be coated with lubricant and free of corrosion. grit and dirt. (4) Forms and reports. Authorized forms and reports for tech- nical inspections are prescribed in TM 9-1100. For addi- tional authorized forms and reports for field and depot main- tenance, refer to paragraph 3. (5) Identification. Inspect lettering engraved on case to see that it is clearly defined and easily read. (6) Paint and brush finish. Inspect for bare spots or damaged finish which expose base metal surfaces and lead to corrosion. The push fit between the reflector shade and case of the aiming post light causes the paint on the case to be scraped off when the reflector shade is removed. This scraped off area and other scrapes or scratches do not require a complete paint refinishing of the light. The area affected should be sanded smooth with a fine grade No. 2 abrasive cloth and touched up as required. Refer to TM 9-2851 for painting procedures. (7) Lubrication. With the exception of the clamps on the bracket, aiming post lights have no moving mechanical parts, or parts subject to mechanical friction. Keep the thumbnut or wing nut screw free of dirt and grit and lubricate the pins, a nd thumbnut and wing nut threads with a drop of light oil applied once weekly. (8) Cracks. Stamping and welds should be inspected for cracks and breaks. (9) Spare parts and equipment. Spare parts and equipment will b e checked against ORD 7 SNL F-205 for completeness. (10) Condition of optics. Window and filter assemblies must be free from scratches, pits, dirt, and chips as will interfere with cleaning of their surfaces or which affect optical performance of the aiming post light. c. Inspection of Electrical Components (figs. 4, 5, and 6). (1) Aiming post lights are equipped with only one control which is a single pole, single throw toggle switch. This switch should move easily, with a sharp click, from the “OFF” to “ON” position. (2) Remove cover and cap assemblies and examine interior for dirt, corrosion or acid action. (3) Examine battery cells for cracks and defects. Cylindrical insulating jackets must not be torn, discolored, or contain foreign matter. Be sure not to use batteries on which the service date limit, indicated on the jacket, has passed. 15