Flo-Check
®
USB Hydraulic System Analyzer
Installation & Programming Instructions
Form No. 05-SGN-PM-00191 02/12
Page 21
B. Relief Valve in Separate Housings
1. If the DCV's center does not allow an unrestricted
fl
ow path back to tank, see Pump Test in the “Tee” Test
installation on page 19.
2. Select Run and/or Record on the PC (see Recording Measurements to a File on page 8).
3. Close the Flo-Check loading valve while viewing or recording the pressure and
fl
ow. Pressure will
increase until relief valve opens. You can reference this point on the Flo-Check software. Repeat to check
the relief valve adjustment.
C. Relief Valves
Often relief valves will start to open before they reach their full pressure
fl
ow settings. This can be noted by
comparing the pressure and
fl
ow rate readings made in Pump Test. Any great decrease in
fl
ow rate from tests
made in Pump Test indicates a faulty relief valve.
D. Motor Test No Load
1. Open the Flo-Check loading valve fully to read maximum pump
fl
ow at zero pressure.
2. Select Run and/or Record on the PC (see Recording Measurements to a File on page 8).
3. Put the motor’s control valve in the forward operating position. (If there are multiple valves, only one
control valve should be in an operating position at any one time.)
4. Using a tachometer run the motor with no load. The
fl
ow and RPM should match the manufacturer’s
speci
fi
cation. A decrease in RPM from the manufacturer’s speci
fi
cations indicates a loss of the motor’s
ef
fi
ciency.
E. Motor Test Loaded
1. Open the Flo-Check loading valve fully to read maximum pump
fl
ow at zero pressure.
2. Select Run and/or Record on the PC (see Recording Measurements to a File on page 8).
3. Put the motor’s control valve in the forward operating position. (If there are multiple valves, only one
control valve should be in an operating position at any one time.)
4. Using a tachometer run the motor while providing a load on the motor. The
fl
ow and RPM can now be
checked against the motor manufacturer’s speci
fi
cations. A decrease in RPM from the manufacturer’s
speci
fi
cations or the unloaded motor test indicates a loss of the motor’s ef
fi
ciency.
