2006 Honda TRX680 Rincon Factory Service Manual, Page 335Get this manual
DRIVETRAIN SYSTEM SOLENOID AND EMERGENCY VALVES Coat new O-ring with engine oil and install it into the stopper bolt grooveApply engine oil to the emergency valveInstall the spring and emergency valve into the AT clutch pressure control solenoid body with the concave head end portion of valve facing inInstall the valve stopper bolt and screw it in until the groove edge is aligned with the valve body surfaceInstall the lock plate and screw as shownSCREW STOPPER BOLT LOCK PLATE
Coat new rubber seal with engine oil and install it into the groove in the AT clutch pressure control solenoid bodyInstall the AT clutch pressure control solenoid assembly with the four bolts