Page 12 September 2012
PFM Portable Hydraulic Testers PFM6, PFM6BD, and PFM8
TEST PROCEDURES
WARNING
Warning - All testers are shipped with the loading valve in the closed position. The loading valve must be opened
fully before initiating flow and testing of the hydraulic circuit. Turn the loading valve handle counterclockwise to the
fully open position. Failure to open the loading valve fully can result in injury to personnel and/or damage to the
equipment.
CAUTION
Caution - The information in this manual is for general application only. Any information furnished by the manufac-
turer of the machine’s hydraulic components should be followed. Specific systems may require specific test proce-
dures.
General Information
The PFM6 and PFM6BD testers are designed to measure flow, pressure and temperature. The PFM8 testers are also designed
to measure power.
The power measurements are derived from the product of flow and pressure. When using a PFM6 or PFM6BD, power can be
calculated using the formulas on page 23.
Standard Test Conditions
1. Install the PFM tester as described in one of the following test procedures:
a. Pump Test
b. “Tee” Test
c. Control Valve, Cylinder and Hydraulic Motor Test
d. Relief Valves in Separate Housings
e. Relief Valves
2. Open the loading valve fully by turning the handle counterclockwise.
3. Start the pump and adjust it to rated speed.
4. To raise the system temperature, close the tester loading valve to develop a pressure somewhat below the relief valve
pressure. Maintain until the desired temperature is reached.
5. Open the tester’s loading valve fully and proceed with the required test procedure.
6. The tester will display ow, pressure, temperature and power readings.
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