Section 6 - Service
90 SCHWARZE HYPERVAC HV-18 revised 11/18
Cleaning/Replacement
1. Unscrew the nozzle retainer nut (D).
2. Remove the spray tip and strainer (B & C).
3. Wash the strainer and examine it.
4. If washing the strainer has removed all particles or
debris, set aside the (now clean) strainer.
5. If the strainer can no longer be thoroughly cleaned, it
needs to be replaced.
6. Wash the spray tip and examine it.
7. If the spray-tip opening is clogged, insert a small-
gauge wire into the spray-tip opening to clear any
debris lodged inside.
8. If the spray tip is damaged, it needs to be replaced.
9. Reassemble the nozzle, replacing any damaged parts
as necessary.
Dust Suppression System Winterizing
Winterizing your sweeper will help keep it in top operating
condition, extending its length of service.
If your sweeper’s dust suppression system will be
operated during freezing temperatures, follow the system
winterization section.
If your sweeper’s dust suppression system will not be
operated when freezing temperatures are expected, drain
the system.
System Winterization
1. Following the antifreeze manufacturer’s instructions,
add environmentally safe antifreeze to the water by
pouring it through the air-gap opening in the top of the
reservoir.
2. Start the auxiliary engine.
3. Turn on the water pump drive motor
4. Turn on all cab console control panel switches
controlling water manifold solenoids.
5. Leave switches on until the antifreeze/water mixture
flows from the spray nozzles.
6. Turn off all cab console control panel switches
controlling water manifold solenoids.
7. Turn off the auxiliary engine.
System Draining
1. Unscrew the bottom of the ‘Y’ strainer housing to
drain the water reservoir(s).
2. After the water flow stops, reassemble the ‘Y’ strainer
housing.
3. Turn on all cab console control panel switches
controlling water manifold solenoids.
4. Connect high-pressure air to the air valve stem
located near the water pump.
5. When lines have emptied, turn off all console control
panel switches controlling water manifold solenoids.
6. Open the cock drain on the bottom of the water
manifold.
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