KB21 Service Manual Pub 09-14
71
Cylinder Control Systems
40-B. Bucher L.8S - Electric Control/Cable
FIXED DISPLACEMENT VALVE END CAP
When the tractor is started and the main spool in the 5 sections of the control valve are in the neutral
determines the pump pressure. (Pump pressure at the neutral position will be equal to standby
pressure).
When one or more of the main spools are activated, the load pressure is fed through the shuttle (or
load sense) valve circuit to the spring chamber behind the pressure bypass adjustment spool. This
needed.
The pilot reducing valve maintains standby (pilot) oil pressure to the proportional control system (200 to
250 psi)
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