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8. Re-install the capacity valve with the valve still in the fully open position.
9. Close the capacity valve (clockwise) to just where the tip of the whole valve touches the plug.
10. Energize your water supply and return pumps.
11. Open any valves necessary to supply water to the dynamometer.
12. Open the pressure boost ball valve fully.
13. Observe water exiting the servo valve outlet.
• Any water observed leaving the servo valve outlet must be water that is leaking past the pump seal
3200P-0750.
• If this amount is more than just a few drops, SuperFlow recommends replacing the pump seal.
14. Remove the plug and restore the absorber to normal operation.
Pump Seal Replacement
All water brake absorbers manufactured by SuperFlow Technologies Group use the 3200P-0750 pump
seal. The purpose of this seal is to prevent water from moving between the rotor and stator area and the
pump housing. Failure of this seal can lead to absorber controllability issues such as reduced loading
capacity, surging, and erratic changes in load.
This part is relatively inexpensive and easy to replace and should be considered a maintenance item.
SuperFlow recommends changing this seal at least once every year or after every 200 hours of operation,
whichever occurs first.
If you experience any of the above symptoms, first check for cleanliness, the overall integrity of the foot
valve, and the water filter attached to it. Also ensure that the load control valve (servo valve) is properly
indexed and that it operates smoothly. Realize that your water supply system must be adequate to keep the
water level in the sump tank above the filter at all times.
After confirming the above criteria are met, if you still experience absorber control issues, pump
seal replacement usually solves the problem. Contact your representative for more information on pump
seal replacement.
6.0 Maintenance
