Priority Valve; When No Steering Operation Is Performed - Toyota 7FBEF 15 Service Manual

4-7

Priority valve

I Operation
When the key switch is OFF
The spool in the priority valve is located to the left of the control spring.
P (Oil pump)
Spool
Control spring

When no steering operation is performed

Hydraulic oil flows from the pump through the spool to PP and LS pilot line.
As the CF line in the steering valve is shut and the pilot line is drained, internal pressure of CF goes
through inside the spool to PP and to the LH chamber, pushing the spool to the right side of the figure.