TM10-3930-660-20 CAUTION Refer to TM9-237, Welding Instructions, to avoid damage to castings if welding method is used. (3) Broken studs can be removed by welding bar stock or a nut to stud and removing with wrench. (4) Install replacement stud slowly to prevent heat buildup and snapping off. e. Gears. (1)  Remove  gears  using  pullers. (2) Only minor repairs to gears are permitted. Remove minor nicks, burrs or scratches on gear teeth with: (a) Fine mill file. (b) Crocus cloth dipped in cleaning solvent. (3) If keyways are worn or enlarged, replace gear. f. Bushings and Bushinng Type Bearings. When bushings and bushing type bearings seize to a shaft and spin in the bore, the associated part must also be replaced. g. Oil  Seals. (1) Remove oil seals by pressing or prying out, being careful not to damage casting or adapter bore. (2) Always install new seal in bore using proper seal replacing tool. 3-8. PAINTING  INSRUCTIONS Upon installation, restored parts must be painted per TB 43-0209. 3-8