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© 2020 Hess & Associates
TROUBLSHOOTING
1. Caking of Media :
A. Media caking is caused by moisture in compressed air supply or
oily and greasy parts. If this is not corrected, media will not flow
and will clog gun. Check air supply. If water or moisture is present,
install a good moisture trap. If oily or greasy parts are being blast
treated, you should first degrease and dry parts.
B. If blast gun should occasionally clog, tightly seal the front of the
nozzle against the inside front the blast cabinet and push foot
valve down 3 to 4 seconds. This will cause the system to back blast
through the gun and media hose and clear the media hose.
Gun Air Pressure Drop :
2.
Set air regulator at 80 PSI on air gauge. Push foot valve and if
gauge reading should drop, check the air supply pipe or hose. A
restriction in the supply line such as reducers or quick couplers will
cause pressure drop. Also, if the blast cabinet is too far from the
air compressor, a pressure drop can occur. We recommend 1/2" -
1" I.D. air supply line. The bigger the better.
3. Poor Visibility - Excessive Dust :
A. Cabinet Air inlet blocked, check for blockage.
B. Dust collector sump full and needs emptied.
C. Cartridge contaminated. Clean by pushing up and down.
D. Media breakdown - replace media and clean dust collector.
4. Poor Media Flow :
A. Wet or damp media caused from moisture or oil in compressed air
line.
Use dry air or install a moisture filter.
B. Replace media and clean media sump and hose.
C. Media level should be below media screen.
D. Hole in media hose from wear, replace hose assembly.
E. Poor Air Flow/CFM
F. Worn Gun Body, Nozzle or Orifice
Man. # 561 v02-02 8/2020
Page 14
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