Shop Manual

20-40
Control Valve of Gearbox
1. Control Valve of Gearbox 15. To Connection of Oil Radiator 57. Pressure Test Port of 2
nd
Clutch (K2)
2. Gearbox 16. From To Connection of Oil
Radiator
58. Pressure Test Port of 3
rd
Clutch (K3)
53. Pressure Test Port of Forward
Clutch (KV)
60. Pressure Test Port of 4
th
Clutch (K4)
55. Pressure Test Port of Reverse
Clutch (KR)
63. Temperature Port of Torque
Converter Outlet
56. Pressure Test Port of 1
st
Clutch
(K1)
65. Pressure Test Port of Main
Pressure Control
General Description
 The oil from pump enters into the gearbox control valve through the oil filter. The oil is
distributed through the main pressure control valve, then flows into the solenoid valve
manipulator loop and clutch manipulator loop, respectively.
 The oil pressure flows into the solenoid valve loop is regulated by the main pressure
control valve that is when the solenoid valve switches on and switches off, it will control
the oil pressure of each shift slid valve.
 The increase of pressure of oil that flows into clutch manipulator loop through main
pressure control valve is regulated by the regulator valve. The oil is use to manipulate the
clutch. The oil releases from the main pressure control valve will supply the torque
converter.
 Through the action of quick return valve and accumulator, the regulator valve smoothly
increase the oil pressure of clutch when the switch of shift, so reduce the impact during
the switch of shift.