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Air Filter Elements
1. Examine the Silica Gel filter for change of color.
2. If the purple gel has become clear, replace the filter.
3. New filters are available from your authorized Welch
Allyn / Kreativ service representative.
4. Examine the Paper Element (coalescing) filters for
damage and wetness.
5. Replace as necessary. New filters are available
from your authorized Welch Allyn / Kreativ service
representative.
Pinch Tubes
1. There is one pinch tube inside the pinch valve
assembly, located between the powder chamber
and the front of the unit.
2. Remove the pinch tube by removing the two thumb
screws and the black cover block.
3. Pull the pinch tube from the hose assembly.
4. Inspect the tube for signs of wear and replace with
new tube as necessary.
5. Realign the pinch tube assembly with the grooves
and securely tighten the thumb screws.
Monthly Requirements
Internal Tubing
1. Inspect internal tubing for wear and air leakage.
2. Listen for audible leaking sounds and look for
powder accumulation internal to the unit.
3. Soapy water and a small paintbrush are ideal for
finding small air leaks.
4. Clean up excess powder to help isolate the leak
area.
5. If a leak is detected, try re-seating the tube into its
fitting, or replace any damaged tubing.
6. If the leaking persists, please call your authorized
Welch Allyn / Kreativ service representative.
Handpiece Nozzles
It is possible to have a worn nozzle without any visible
signs. However, the system's performance will be
affected.
1. Inspect all the handpiece nozzles for wear, paying
close attention to the carbide insert at the end of the
tip.
2. If there are any slits or chips, replace the nozzle.
3. A worn nozzle will greatly effect the performance of
cutting and powder flow control.
990154 Rev. A
7
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