IMPLEMENT AND STEERING HYDRAULIC SYSTEM CONTINUED
c. Basic Valve Operation
When the control valve spool and all implement valve spools are in the HOLD position, pump oil from the inlet
manifold flows to the inlet passage. Oil flows through metering holes in the priority flow control valve. The oil moves
the priority flow control valve against the spring. Pump oil flows out of outlet passage #2 to the next control valve.
Because all implement control valves are in the HOLD position, pump oil fills the parallel oil passages at
approximately 525 psi (3,600 kPa). Signal oil passage, resolver, passage #1 and passage #2, and chamber are
drained. The oil that is in steer left and steer right passages and passage #3 is blocked.
Figure 23. Steering Control Valve (HOLD).