When moving the position control lever from “LIFTING” to “NEUTRAL”, the spool (1) is pushed back
as shown in the figure.
When the “NEUTRAL” position comes near, the tapered portion (5) of the spool (1) makes the pressure
difference at the P port and C port.
Therefore, the poppet 1 (4) gradually closes, and absorbs any shock at the A chamber (a) behind the unload poppet (2), the unload poppet (2) does not open.
However, the poppet 3 (3) opens because of the low pressure in B chamber (b), and then the oil from the
pump returns to the transmission case through T3 port.
