Control Systems; Commissioning, Start-Up, Operation, Shutdown; Information - Pentair Hypro 9302C Series Installation And Operation Manual

• Closed center Load Sensing (Flow and Pressure-Compensated) systems
• No special requirement for bypass or metering orifices
Hydraulic system plumbing
• When installing the hydraulic motor into the tractor's or sprayer's hydraulic system, make sure that no dirt or liquid gets
into the hydraulic motor.
KEEP ALL HYDRAULIC CONNECTIONS CLEAN.
• Ensure return line is connected to low pressure return port on the tractor recommended for hydraulic motors, the ports
are identified on the motor casting. Hydraulic supply lines should be at least the same size as the hydraulic motor port or larger.
• Standard models come equipped with a check valve port adaptor on the motor outlet, that should not be removed.
Hooking up the motor in the wrong direction will damage the hydraulic seal.
* Hydraulic back pressure in the return line must be less than 100 PSI [6.9 bar] (20 PSI [1.4] for GM1 pumps) to prevent
reduced seal life. Pressures under 50 PSI [3.4 bar] (20 PSI [1.4 bar] for GM1 motors) are recommended.
* For motors equipped with case drains the case drains must be used to minimize the pressure acting on the hydraulic
motor seal, and extend the life of the oil seal.
* The case drain line must be connected directly to the hydraulic reservoir with no restrictions, and the case drain port on
the motor must always be oriented upward.
THE CASE DRAIN PORT ON THE HYDRUALIC MOTOR MUST NEVER BE PLUGGED.
Attention: For pumps equipped with HM2 and HM4 motors, the metering orifice should not be used if the hydraulic
system is a load-sensing (flow-compensated) closed center system, or if it is an open center system with a maximum
flow of 8 gpm [30.28 lpm] for HM2C or 10 gpm [37.85 lpm] for HM4C.
• Correct orifice size is determined by system performance. Start by installing the smallest orifice in the adapter connected
to the pressure port. Once the orifice is installed, test system performance and if system performance is low, install the
next largest orifice. Continue this process until pump performance reaches the desired level, or no orifices are installed
in the adapter.
• Ensure hydraulic system is off.
• Remove the adapter from the motor using a 1-1/16'' wrench. Make sure the O-ring is on the metering orifice
before installing into port adapter.
• The orifice is removed or installed in the port adapter by tapping either in or out of the adapter.
1) To remove, tap the orifice out from the small end of the adapter.
2) To install, tap the orifice in from the large end of the adapter. The orifice is seated when a snap sound is heard.
For HM2 and HM4 motors, the pressure differential across the motor should never exceed 2500 PSI [172 BAR].
• All pump systems with electric or hydraulic power sources are required to have a control system which meets all local
and national standards.
• For more detail on a typical system installation, see preceding subsections of the "Assembly and Installation" section of
this manual.

Commissioning, Start-Up, Operation, Shutdown

Before attempting to start your pump, the following must be understood and followed to ensure safe operation.
• When running Hypro centrifugal pumps, it is essential that operators use hearing protection as the sound levels can
reach levels of 80 decibels.
Installing and Removing Metering Orifice

Control Systems

Information

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Form L-1593
Rev. B
(12-09-19)