TM 9-2350-238-34-1N O T ET o i n c r e a s e b a c k l a s h , t r a n s f e r s h i m sfrom shaft bearing housing to driveg e a r b e a r i n g h o u s i n g . T o d e c r e a s eb a c k l a s h , t r a n s f e r s h i m s f r o m d r i veg e a r b e a r i n g h o u s i n g t o s h a f t b e a r i ngh o u s i n g . E a c h l a m i n a t i o n o f s h i m is0 .0 0 2 i n . ( 0 . 0 0 5 c m ) t h i c k . A b o ut0.001 in. (0.003 cm) change inbacklash requires transfer of twos h i m l a m i n a t i o n s.2 8 A p p l y w h i t e e n a m e l t o f o u r o r f i v e t e e t h ofbevel gear set spiral gear (12) and bevelgear set spiral pinion gear (23). Rotateg e a r s e t s h o u l d e r e d s h a f t ( 1 3 ) . E x a m i new e a r p a t t e r n o n g e a r t e e t h . W e a r p a t t e rnshould be about one half length and depthof tooth and centered on tooth face (p2-97). Correct backlash (step 27) if wearpattern is not correct.2 9 R e m o v e t h r e e c a p s c r e w s ( 2 1 ) a n d d r i veg e a r b e a r i n g h o u s i n g ( 1 7 ) . U s i n g b e a r i ngcup replacer (item 14, appx E), install newplain encased seal (27) with open lipfacing into drive gear bearing housing.2 - 1 29
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