TM 9--2815--247--34 0012 00--8 GENERAL MAINTENANCE INSTRUCTIONS -- CONTINUED 0012 00 GENERAL REPAIR -- CONTINUED Gears and Shafts -- Continued WARNING Replace all gears and shafts having worn, galled, nicked, burred, or pitted teeth and splines. Remove any sharp fins and burrs from splines with crocus cloth dipped in dry--cleaning solvent (item 5, WP 0100 00). Replace all splined gears and shafts that are damaged to the point of impairing assembly or operation. Replace all gears and shafts having splines which do not match properly with mating splines. Bushings, Liners, and Bushing--type Bearings. When bushings, liners, and bushing--type bearings are damaged or worn beyond specified limits, generally the associated parts with which they are used must be replaced. Reference to WP 0012 00 will be made in the repair section for the particular part when replacement of bushings, liners, and bushing--type bearings is required. Removal  Drill out bearing retaining pins used to secure bearings in castings or retaining cages when applicable. Installation  Align bushing, liner, or bushing--type bearing in casting or retaining cage. Press into place with a suit- able pressing arbor. Select proper drill size for installation of bearing retaining pins. Drill through bearing and into casting or retaining cage to the proper depth so that the pin will be flush with the bearing surface after installation. Drive retaining pin through bearing and into casting or retaining cage. Cut off any portion of the pin that extends above bearing. Ream or burnish bushing, liner, or bushing--type bearing to size specified in appropriate repair standards table. Clean repaired parts thoroughly before assembly or installation. Oil seals Replace all oil seals at engine repair. Removal  Press or pry oil seal from casting or adapter. WARNING Repair  When oil seal bore in casting or adapter is burred or damaged to a point where an oil--tight seal is impossi- ble, repair or replace casting or adapter. Remove slight nicks, burrs, and scratches from oil seal bore in casting or adapter with crocus cloth dipped in dry--cleaning solvent (item 5, WP 0100 00). Installation  Install new oil seal in bore of casting or adapter.