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SKU 94274 For technical questions, please call 1-800-444-3353 PAGE 19
TROUBLESHOOTING
Blast Gun. 1. After 10 to 12 hours of blasting time, the Nozzle (2D, 2E)
should be checked. It it shows uneven wear it should be turned 1/4 turn every
10 hours of use. Replace as needed.
Caking of media. 2. Media caking is caused by moisture in the air supply or from
oily or greasy parts. If this is not corrected the media will not ow evenly and will
plug up in the Metering Valve (13) and Blast Gun (4B). Check the air supply. If
water is present, install a quality moisture trap. If oily or greasy parts are being
blasted, degrease and dry the part rst.
Reverse pressure. 3. If the media stops owing occasionally, use an object to
plug the Nozzle (2D, 2E) and press the Foot Pedal (11) down for about
two seconds. This will cause the system to back blast through the Blast Gun
(4B) and up the media hose. This will help loosen any clogs.
Blast Gun air pressure drop. 4. Turn the Air Regulator Knob (9) and set the
air pressure to 80 PSI as indicated on the Pressure Gauge (8). Push the Foot
Pedal (11) while holding the Blast Gun (4B), and observe if the gauge pressure
drops signicantly. If the pressure drops, this indicates there is a restriction in
the air supply line. This could indicate the air supply hose is too small, a reducer
or quick coupler, or other piping that doesn’t allow enough air through. Also, if the
air compressor is too far away from the Blast Cabinet a pressure drop will result.
The air supply line should be 1/2” diameter or larger.
Poor visibility (excessive dust). 5. Check to make sure the Quick Coupler on the
Air Regulator (9) is allowing air to the Cabinet (22).
Poor visibility (viewing window). 6. The Glass Window (17) is equipped with a
clear plastic protector on it and may become pitted. If necessary, replace the
plastic protector and/or Glass Window.
Poor media ow. 7. Check for moisture as discussed in Step #2 of this section.
Holes in media hose will cause poor media delivery. If necessary, replace hose.
Debris in media. Replace or screen media.
REV 08a