1999-2002 TRX400EX Fourtrax Service Manual, Page 155Get this manual
CRANKCASETRANSMISSIONCRANKSHAFT Apply oil to new bearingsDrive the mainshaft, crankshaft and balancer bearings in with the marking side facing up using the special toolsTOOLS: Mainshaft bearing: Driver Attachment, 42 47 mm Pilot, 22 mm Crankshaft bearing: Driver Attachment, 72 75 mm Pilot,30mm Balancer bearing: Driver Attachment, 37 40 mm Pilot, 15 mm
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Drive new countershaft oil seal in using suitable 24 mm socketDrive the countershaft bearing in with the sealed side facing down using the special toolsTOOLS: Driver Attachment, 42 47 mm Pilot17 mm