Pentair HYPRO 9343 Series - Operation; Adjusting Pump Output; Storage

Open Center Systems - All Models
Adjusting Centrifugal Pump Output
1. Install a shut-off valve and pressure gauge on the dis-
charge line for initial setup.
2. Openthebypassadjustmentscrew2-1/2turnsfromfully
closed. Turn the bypass screw in to achieve the flow for
the desired gpm and psi.
3. Start the tractor. Leave the directional valve in the neutral
position and allow hydraulic oil to circulate for approxi-
mately 10 to 15 minutes or until adequately warmed.
4. Prime the centrifugal pump with all valves open (See
the Installation Instructions and System Configuration Di-
agram).
5. Once the pump is primed, shut off the dischage line and
monitor the pressure. Shut-off pressure is not to exceed
60PSI.Adjustdischargescrewaccordingly.
Closed Center (Load Sensing) All Models
Many tractors are being introduced with load sensing sys-
tems (also referred to as flow and pressure- compensated
systems) which simplify system setup and eliminate many
of the problems associated with using the wrong size pump
motors on a given hydraulic system. Usually, any of Hypro’s
9300HMC models may be used on this type of system, pro-
vided the hydraulic system produces sufficient oil flow for the
hydraulic motor being used (Refer to the Pump Selection
Guide).
This system maintains a constant flow of hydraulic oil for a
givenpressuredrop.Theflowisadjustablewithaflowcontrol
valve installed in the hydraulic system (such as the Tortoise/
Hare control on John Deere tractors). Because this system
hasadjustableflow,thereisnoneedtobypasshydraulicoil
as in an open center system, or to restrict the flow with ori-
fices as in a closed center pressure- compensated system.
Adjusting Centrifugal Pump Output
1. Install a shut-off valve and pressure gauge on the dis-
charge line for initial setup.
2. Closeandlockdownthebypassadjustingscrewinthe
hydraulic motor.
3. Set the tractor hydraulic flow control valve for minimum
hydraulic oil flow to the remote outlet (Tortoise position).
4. Start the tractor and allow the hydraulic oil to circulate
for approximately 10 to 15 minutes or until adequately
warmed.
5. Prime the centrifugal pump with all valves open (See the
Installation Instructions and System Configuration Dia-
gram).
6. Shut off the discharge valve and monitor the pressure.
Slowlyadjustthetractorhydraulicflowcontrolvalveuntil
the pump deadhead pressure approaches 60 PSI.
Storage
1. Drain pump. Flush pump after use.
One of the most common causes for faulty pump perfor-
mance is gumming or corrosion inside the pump. Flush
the pump and entire system with a solution that will
chemically neutralize the liquid pumped. Mix according
to the manufacturer’s directions. This will dissolve most
residues remaining in the pump, leaving the inside of
the pump clean and ready for use.
2. Store pump in a clean, dry environment.
Operation
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L-1581 Rev. A (10/18)