TM 9-2320-361-34 I 2-10. REPAIR (Contd) (3) Broken studs can be removed by welding a nut or bar stock to stud and removing with wrench. NOTE Standard studs may have a coarse thread on one end and a fine thread on the other end. The coarse thread end is installed in the aluminum casting. Studs having coarse threads on both ends are used in some applications. The short threaded end goes into the casting. Refer to TM 9-2320-361-34P for correct part numbers. (4) Replacement studs have a special coating and must have a small amount of antiseize compound (MILA-907) applied on threads before stud is installed. Install replacement stud slowly to prevent heat buildup and snapping off. e. Gears. (1) Remove gears using pullers. (2) Use the same methods described in paragraph 2-10b to remove minor nicks, burrs, or scratches on gear teeth. (3) If keyways are 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. g. Oil Seals. (1) Remove oil seals by pressing or prying out. Be carefbl not to damage casting or adapter bore. (2) Always install new seal in bore using proper seal replacing tool. h. Cylinder Head - Cylinder Block. Repair of cylinder head and cylinder block is limited to procedures outlined in TM 9-2815-210-34-2-2. I I 2-11. ASSEMBLY - PRECAUTIONARY RULES a. Cleanliness is essential in all component assembly operations. Dirt and dust, even in small quantities, are abrasive. Parts must be cleaned as specified and kept clean. Wrap or cover parts and components when assembly procedures are not immediately completed. b. Coat all bearings and contact surfaces with operating oil (axle oil for axle parts, transmission oil for transmission parts, etc.) to ensure lubrication of parts during initial operation after repair. c. Use new gaskets and preformed packings during assembly of all components. 2-36