2006-2009 Honda TRX680 (TRX 680 FA-FGA) Factory Service Manual, Page 185Get this manual
COOLING SYSTEM Install he fan otor on the motor sta in the ir ec-
tion as shown nd tighten the three bolts securely
Insta ll he coo li ng fan on Ihe fan moto shaftaligning he fl al surfaces
A pp ly lock ing agen to the motor shalt threa ds Inslall he nut and ti hten it