Leveling Blade Control Valve - HOLD Position.
(2) Centering spring. (3) Passage to rd end of cylinder. (4) Outlet passage. (5) Passage to head end of cylinder. (6) Spool. (8) Inlet passage (9) Relief
In the HOLD position, spool (6) stops the pressure oil in
passage (8) from going into passages (3) and (5). The oil in
passage (3) to the rod end of the cylinder and passage (5) to
the head end of the cylinder is blocked. This holds the blade in
Centering spring (2) holds spool (6) in this position. Pressure
oil from inlet passage (8) flows across the spool to outlet