Pressurized oil delivered from the P port, pushes the unload poppet (2) and returns to the transmission case
from T1 port.
Since the poppet 1 (3) is closed by the spring located behind the poppet 1 (3), the oil in the hydraulic cylinder
is not drained to the transmission case.
At this condition, position control is kept at “NEUTRAL”.
The oil in the hydraulic cylinder is cut off by the actions of poppet 1 (3) and poppet 2 (4).
