5/30/01
Page 3-3: Operating Instructions
Boxxer 421
9. If used, turn PUMP OUT switch to “ON” (switch light will be illuminated).
10. Set cleaning pressure at desired level (300 –400 psi).
11. Turn the chemical selector valve to the “PRIME” position to purge any
air from the system.
a. If the chemical does not begin to flow through the flowmeter within 60
seconds, remove the chemical PRIME line (the one without the filter)
from the chemical container and insert it into the vacuum hose connec-
tion at the front of the machine.
b. When the chemical begins to flow through the flowmeter, with the flow
indicator reading maximum flow and the PRIME line pulsing, turn the
chemical selector valve to “ON”, and place the chemical PRIME line back
into the chemical container.
c. Then, while spraying solution from the cleaning tool, adjust the chemical
flow by turning the chemical adjustment knob as necessary.
12. Commence cleaning.
Flood Extraction
1. Start the engine with the THROTTLE switch in “IDLE” position.
Allow the machine to run in idle for 2 - 3 minutes to warm up.
2. Connect hoses.
3. Connect wand or tool.
4. Set the THROTTLE to “HIGH”.
5. If used, turn PUMP OUT switch to “ON” (switch light will be illuminated).
6. Commence water extraction.
Note: Make sure the diverter and pump switch are in the “OFF” position.
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