Honda 2006 TRX680FA Service Manual page 53

TECHNICAL FEATURES
HYDRAULIC VALVE FUNCTION
• AIT Clutch Pressure Control Solenoid Valve (Linear Solenoid Valve)
The
NT
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 81
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 cireuits to the three clutches.
• Orifice Control Valve 12ndand 3rd)
The orifice control valves operate when clutch fluid pressure rises during shifting. It releases the pressure to reduce
shift shock.
• Emergency Valve
The emergency valve is used when the hydraulic pressure is shut off by a faulty clutch PC solenoid valve (stuck;
mechanical lock), and the vehicle is hindered from running, Open 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.)
SHIFT
SOLENOID
VALVE A
tst
SHIFT
CLUTCH
2nd
ORIFICE
CONTROL
VALVE
x
3rdORIFICE
CONTROL
VALVE
x
x
x ,
3rd
SHIFT CLUTCH
j
2-3
SHIFT VALVE
~~~)J
f======'c'I
I
Crankshaft
2nd
SHIFT CLUTCH
\
TORQUE CONVERTER
OIL PUMP
2-9