Test Procedures
Tee Test
Install a tee between the pump and control valve and connect it to the
IN
port of the Hydraulic System Analyzer The
OUT
port of the Hydraulic System Analyzer is connected to the tank Pumps and relief valves can be isolated from the system and
checked with the
Tee Test
Flo-Check
Figure 7: Tee test
WARNING
INCREASE PRESSURE SLOWLY. THE RELIEF VALVE MAY NOW BE ISOLATED FROM THE HYDRAULIC CIRCUIT, AND SYSTEM
PRESSURES HIGHER THAN THE RELIEF VALVE SETTING CAN RESULT IN INJURY TO PERSONNEL AND/OR DAMAGE TO
THE EQUIPMENT.
Pump Test
1 Install the Hydraulic System Analyzer in the
Tee Test
configuration and plug the line to the control valve
2 Open the Hydraulic System Analyzer loading valve fully to read maximum pump flow at zero pressure
3 Select
Run
and/or
Record
on the PC (see
"Recording Measurements to a File" on page 10
), then close the loading valve to
increase pressure from zero pressure to rated or maximum pump pressure to determine pump condition
4 The pump flow at rated pressure can now be checked against the pump manufacturer’s specifications A decrease in flow
from zero pressure to maximum pressure indicates the pump condition A pump that delivers a constant low flow at zero
pressure and at maximum pressure suggests suction problems
Relief Valve Test
1 Put a control valve into a power output mode with the output flow blocked, such as a cylinder at the end of its stroke or
center a closed center valve
2 Select
Run
and/or
Record
on the PC (see
"Recording Measurements to a File" on page 10
)
3 Close the Hydraulic System Analyzer loading valve while recording or viewing the pressure Pressure increases until the
relief valve opens Record the pressure at this point Repeat to check the relief valve adjustment
Relief Valve in Separate Housings
1 Install the Hydraulic System Analyzer in the
Tee Test
configuration and plug the line to the control valve
2 Select
Run
and/or
Record
on the PC (see
"Recording Measurements to a File" on page 10
)
3 Close the Hydraulic System Analyzer loading valve while recording or viewing the pressure and flow Pressure increases
until the relief valve opens You can reference this point on the Hydraulic System Analyzer software Repeat to check the
relief valve adjustment
Relief Valves
Often relief valves start to open before they reach their full pressure flow settings This can be noted by comparing the
pressure and flow rate readings made in a pump test Any great decrease in flow rate from tests made in a pump test indicates
a faulty relief valve
Page 19
June 2022
TST-UM-02433-EN-02