3-10
CONTROL VALVE
6)
The control valve consists of the main relief valve, solenoid valve, modulation valve and inching
valve.
The discharged oil from the gear pump enters main relief valve of the control valve and its
pressure is adjusted 10.8~14.9
kgf/cm
2
(154~212
psi
).
The oil adjusted pressure by the main relief valve is decided on the direction of forward or reverse
by the solenoid valve.
The decided oil is delivered the power transferred from the torque converter to drive axle through
the oil path between torque converter housing and transmission case.
The modulation valve provide a soft plugging when changing gears.
The modulation valve to absorb the small shocks of rapid pressure build up and quick release
during gear changes.
When full pressure builds up, the modulation valve shuts the modulation off and allows it to
empty, so it is ready to function again during gear change.
The inching valve permits the clutch to partially disengage, so that engine rpm can be increased
for lifting while travel speed remains low.
21
78 4
15L7APT08
Operation
(1)
1 Modulation
2 Solenoid valve
3 Inching spool
4 Main relief valve
5 Inching valve pressure check port
6 Forward clutch pressure check port
7 Reverse clutch pressure check port
8 Main pressure check port
To Next Page
Loading...
