Flo-Check
®
USB Hydraulic System Analyzer
Installation & Programming Instructions
Page 20
Form No. 05-SGN-PM-00191 02/12
3. Close the Flo-Check loading valve while recording or viewing the pressure and
fl
ow. Pressure will
increase until the relief valve opens. You can reference this point on the Flo-Check software. Repeat to
check the relief valve adjustment.
D. 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.
II. Inline System Test
Virtually all system components can be unidirectionally tested or set in this con
fi
guration.
Flo-Check
FIGURE 8 -
Inline System Test
Begin by installing the Flo-Check between the pump and the control valves.
A. Pump Test
1. If the directional control valve's (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. Open the Flo-Check loading valve fully to read maximum pump
fl
ow at zero pressure.
3. Select Run and/or Record on the PC (see Recording Measurements to a File on page 8), then close the
loading valve to increase pressure from zero pressure to rated or maximum pump pressure to determine
pump condition.
4. The
pump
fl
ow at rated pressure can now be checked against the pump manufacturer’s speci
fi
cations.
A decrease in
fl
ow from zero pressure to maximum pressure indicates the pump condition. A pump that
delivers a constant low
fl
ow at zero pressure and at maximum pressure suggests suction problems.
