2-15. REPAIR INSTRUCTIONS (CONT)
d. Studs. Replace all bent and stretched studs. Repair minor thread damage with a thread die. Replace
studs having stripped or damaged threads as outlined below:
Remove using a stud remover. Back studs out slowly to avoid heat buildup and seizure that can
cause stud to break off.
Refer to TM9-237, Welding Instructions, to avoid damage to castings if welding method
If studs break off too short to use a stud remover, use a stud extractor to remove or use "welding
Broken studs can be removed by welding bar stock or a nut to stud and removing with wrench.
Install replacement stud slowly to prevent heat buildup and snapping off.
Remove gears using pullers.
Only minor repairs to gears are permitted. Remove minor nicks, burrs, or scratches on gear teeth
Fine mill file.
· Drycleaning Solvent (P-D-680) is TOXIC and flammable. Wear protective goggles and
gloves; use only in a well-ventilated area; avoid contact with skin, eyes, and clothes;
and do not breathe vapors. Keep away from heat or flame. Never smoke when using
solvent; the flashpoint for type I drycleaning solvent is 100°F (38°C), type II is 138°F
(59°C), and type III is 200°F (93.3°C). Failure to do so may result in injury or death to
· If personnel become dizzy while using cleaning solvent, immediately get fresh air and
medical help. If solvent contacts skin or clothes, flush with cold water. If solvent
contacts eyes, immediately flush eyes with water and get immediate medical
Crocus cloth dipped in drycleaning solvent.
If keyway is worn or enlarged, replace gear.
f. Bushings and Bushing Type Bearings. When bushings and bushing type bearings seize to a shaft and
spin in the bore, the associated part must also be replaced.