TM  10-3930-643-34 GENERAL  SUPPORT 13-6. Rear Oil INSTALLATION 6. 7. 8. ENGINE,  FUEL,  EXHAUST  AND  COOLING  MAINTENANCE. Seal. (Sheet Before  installing  sleeve check the seal bore for 4 of 6) and  seal, chamfer. If no chamfer is found, use a file to break the edge of the bore. Failure to follow this procedure could result in damage to casing when sleeve and seal are installed. Be careful not to damage the bore while filing the chamfer edge. Lubricate lip of new oil seal (1) with grease. NOTE Seal must be installed onto side of sleeve with chamfer on O.D. to avoid  damage  to seal  lip,  as shown. Assemble new oil seal (1) onto new wear sleeve (3) by pushing new oil seal (1) in the direction of the arrow. Install  flywheel  housing (2) to crankcase,   refer to paragraph 13-7. Go to sheet 5 13-41

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