Remove burrs, scratches or raised metal. Use a fine file, stone or crocus cloth dipped in oil.
Lubrication. Refer to LO 10-3930-643-12 for detailed, illustrated instructions on proper lubrication. Some
general practices to remember include:
Use the correct lubricant.
Keep lubricants clean.
Clean all fittings prior to lubrication.
Lubricate clean disassembled and new parts to prevent rust.
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:
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:
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.
Thoroughly clean the mating surfaces. Surfaces must be free of grease, paint, rust or any other
Brush each mating surface with a thin, even coat of liquid gasket.
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.
Press surfaces together. Ensure full contact between surfaces. Do not pull or pry either surface
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: