Section 6 - Service
HV-18 revised 11/18 SCHWARZE HYPERVAC 89
Water Pump Pressure Check
1.
Turn off the auxiliary engine.
2. Use a gauge to check the pump’s output pressure.
Attach a pressure gauge (able to measure at least
500 psi) to the boiler drain on the front of the fill hose
storage rack.
3. Open the boiler drain.
4. Turn on the water pump.
5. Be sure all the console control panel switches
operating the sweeper’s water functions are in the off
position.
6. If the gauge reads roughly 50 psi, no adjustment is
needed.
7. If the pressure gauge reading is considerably different
from 50 psi, you may need to adjust the water pump’s
relief valve. Pressure that is jet too high can cause
premature water pump failure.
8. Locate the relief valve in the group of fittings attached
to the pressure port of the pump.
9. Screw the jam nut away from the relief valve’s body.
10. Turn the hexed stem of the relief valve to adjust the
water system pressure.
11. When the water pressure is roughly 50 psi, run the
jam nut back against the body of the relief valve.
Water Nozzle Cleaning/Replacement
A Spray Body
B Water Filter Mesh
C Spray Tip
D Spray Tip Retainer Nut
Due to dusty conditions encountered during sweeping
operations, dirt and debris particles entering the dust
suppression system are sometimes small enough to pass
through the ‘Y’ strainer. These particles can build up within
a nozzle’s openings, restricting water ow. When this
occurs, the nozzle must be cleaned or replaced.
6.7 Dust Suppression System
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