Clutch B Engaged.

In Park and Neutral, solenoid valves 1 and 2 are both ON. Pressure control solenoids 4 and 6 are also turned ON.

When solenoid 6 is ON, the fluid from the reduction valve flows to the safety valve, clutch valve B, and the holding valve B. The oil that is supplied to the inlet port of the clutch valve presses on the valve spool. Line pressure then flows to the holding valve and the check ball, engaging clutch B.