GENERAL MAINTENANCE INFORMATION. (cont)
Electrical System Components and Wiring. (cont)
Threaded holes in metal must be thoroughly clean when sealing compounds are used to lock
screws in place. Take off old preservative or sealing compounds from threads with tap and tap wrench. Blow loose
particles out of holes with compressed air, then clean threads with cleaning compound MIL-C-81302 and brush. Let holes
dry before putting in screws.
Check intake cooling vents and screens and exhaust ducts for anything that will block the flow of
air. Clean intake vents and screens to keep dirt from getting inside equipment.
Replacing Electrical Wiring or Components.
Always look carefully at equipment for likely signs of trouble while doing routine work. Tie down any
harness that is free to move and rub against metal. If you look for possible trouble spots and make repairs at once, you
can cut down on repair time and extra work. Replace any harness or harness wires that have splits, tears or worn spots. If
troubleshooting isolates a broken harness, replace that harness.
Replace broken or torn instrument or gage lenses, rubber eye cups, headrests and other parts.
Replace damaged or crossthreaded screws and nuts. Check for torn or stretched gaskets and
Replace any burned out lamps or fuses. If you cannot replace a lamp or fuse right away, tag it and
go back to it later.
Tighten all loose parts. Use correct torque values when tightening screws and nuts. Straighten
bent parts where possible and check for cracks. Replace all missing parts.
Make sure that ground points in electrical system are kept clean, free of corrosion and tight.
Check mountings, parts and shafts for proper alignment.
Removing Electrical Connectors.
Be sure MASTER POWER is OFF before taking off or putting on connectors; refer to TM 5-3805-
261-10. You could get a shock or cause equipment damage.