Preventive maintenance
DynaMAX 550P/560P/575P Waterjet Pump Operator Manual 811390 89
5. Do this procedure again until the pressure is at the correct value.
6. Install the valve stem cap.
Check the low-pressure water pressure gauges
The prefilter water-pressure gauge shows the water pressure before the water goes through the
filters. The postfilter water-pressure gauge shows the water pressure after the water goes through
the filters.
The usual operating range is 2.8 bar to 7.6 bar (40 psi to 110 psi).
Do this task when the pump is running.
1. Subtract the value shown on the postfilter water pressure from the value shown on the prefilter
water pressure.
2. Replace the water filters if the difference between the values on the prefilter water-pressure
gauge and the postfilter water-pressure gauge is lower than 0.7 bar (10 psi).
Replace the water filters after every 1,000 hours of operation or if the difference between the values on the
prefilter water-pressure gauge and the postfilter water-pressure gauge is lower than 0.7 bar (10 psi).
1 Prefilter water-pressure gauge
2 Postfilter water-pressure gauge
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