TM 10-3930-664-24 (4) Remove burrs, scratches or raised metal.  Use a fine file, stone or crocus cloth dipped in oil. e. Lubrication.  Refer to LO 10-3930-643-12 for detailed, illustrated instructions on proper lubrication.  Some general practices to remember include: (1) Use the correct lubricant. (2) Keep lubricants clean. (3) Clean all fittings prior to lubrication. (4) Lubricate clean disassembled and new parts to prevent rust. f. Application   of   Adhesives.      Liquid   gasket,   silicone   rubber   adhesive   and   Loctite   retaining   and   sealing compounds  are  recommended  in  some  tasks  to  ensure  and  strengthen  seals.    The  following  procedures  describe  their correct use and application: (1) Liquid Gasket.  Can be used on machined surfaces  (where  no  gasket  is  specified),  ground  joints  and threaded  connections.    It  can  also  be  used  with  all  types  of  gaskets.    Liquid  gasket  is  heat  and  cold resistant, unaffected by low pressure gases, gasoline, oil or other liquids, and prevents seizure. Liquid gasket is applied as follows: WARNING TOXIC/FLAMMABLE Liquid gasket is toxic and flammable.  Use only in well ventilated areas.  Avoid contact with eyes or  skin.    If  injured,  seek  medical  attention  immediately.    Do  not  allow  near  open  flame,  heat  or sparks.  Do no smoke when working the liquid gasket. (a) Thoroughly clean the mating surfaces.  Surfaces must be free of grease, paint, rust or any other foreign substance. (b) Brush each mating surface with a thin, even coat of liquid gasket. (c) Allow 10-20 minutes to dry until tacky.  Temperature and humidity will affect drying time.  Adhesive is correct consistency when it does not transfer to finger when touched. (d) Press surfaces together.  Ensure full contact between surfaces.  Do not pull or pry either surface after mating. (2) Silicone Rubber Adhesive.  Except for the instrument panel which is sprayed with anti-corrosive varnish, all electrical connections are sealed against moisture with a room temperature vulcanizer silicone rubber sealant, MIL-A-46146A Type 1.  If you must break into this seal for repair work, you must remove the switch involved completely from the machine.  Silcone rubber adhesive is applied as follows: 1-38