IMPLEMENT AND STEERING HYDRAULIC SYSTEM CONTINUED
Ripper Lift Control Valve (Ripper Lower)
When the pilot control pressure causes the valve spool to move to the LOWER position, cylinder oil from the
passage flows through the passage to the chamber. The oil functions as signal oil. The signal oil opens the
resolver. The signal oil flows to the previous control valve and to the inlet manifold.
The increase of pump oil flow to the inlet passage opens the load check valve. The oil flows through the load check
valve. The oil then flows around the valve spool and out the head end passage to the head end of the ripper lift
cylinders. The ripper lift cylinders then lower the ripper.
Return oil from the rod end of the ripper lift cylinders flows through the rod end passage, around the valve spool,
and through the outlet passage to the tank.
Figure 35. Ripper Lift Control Valve (RIPPER LOWER).