2006 Honda TRX680 Rincon Factory Service Manual, Page 500Get this manual
REAR DRIVING MECHANISM Be sure to wear heavy gloves to avoid burns when handling the heated gear caseUsing torch to heat the gear case may cause warpage
U.S.Aonly: Freeze the pinion gear and bearingHeat the gear case to 80C (176F)Drop the cold pinion assembly into the warm gear case
Install new lock nut and tighten it using the special toolTOOL: Lock nut wrench, 30 64 mm 07916-MB00002
LOCK NUT WRENCH
Refer to torque TORQUE: wrench reading Actual: 98 (10.0 kgfm, 72 Ibfft) information on Indicated: 89 (9.1 kgfm, 66 Ibf ft) "Service Information" (page 19-3)