2006 Honda TRX680 Rincon Factory Service Manual, Page 53Get this manual
TECHNICAL FEATURES HYDRAULIC VALVE FUNCTION AT Clutch Pressure Control Solenoid Valve (Linear Solenoid Valve) The AT Clutch PC solenoid valve controls the vehicle creep by diverting the hydraulic pressure that flows to the entire clutch system to the linear valve Shift Solenoid Valves (A and B) The shift solenoid valves control the shift timing by supplying and shutting off hydraulic pressure to activate the shift valves Shift Valves (1-2 and 2-3) The shift valves switch the hydraulic circuits to the three clutches Orifice Control Valve (2nd and 3rd) The orifice control valves operate when clutch fluid pressure rises during shiftingIt releases the pressure to reduce shift shock Emergency Valve The emergency valve is used when the hydraulic pressure is shut off by faulty clutch PC solenoid valve (stuck; mechanical lock), and the vehicle is hindered from runningOpen the bypass oil circuit manually to supply hydraulic fluid(In this case, the transmission is held in 2nd range and the vehicle creeps during idling