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TROUBLESHOOTING
Problem
Possible Cause
Remedy
1. Breaker is tripping when
#3390 and dust collector are
turned to the ON position
a. #3390 and dust collector
should be powered by separate
breakers.
a. Find electric outlets with
separate breaker switches and use
accordingly.
b. Check circuit breaker sizes
2. #3390 is vibrating excessively
a. Excessive vibration is usually
caused by the blast wheel being
out of balance due to it being
worn or blades being broken or
chipped.
a. Check blast wheel immediately.
b. Install new blast wheel kit.
Failure to install new wheel kit in
this instance can lead to serious
damage to machine.
3. #3390 is creating excessive
noise
a. This problem is most likely
caused by an improper
alignment of the blast wheel
and control cage.
a. Check alignment of blast wheel
and control cage immediately and
verify there is adequate clearance
between the blast wheel and the
control cage.
4. #3390 is creating excessive
wear on liners and blast housing.
a. Adjust control cage so that “hot
spot” is centered in work area
rather than on liners or housing.
5. #3390 is dropping excessive
amount of steel shot.
a.Verify “hot spot” is centered
properly and adjust control cage as
necessary.
b. Verify seals do not have
excessive wear, feed spout is
aligned properly, and shot valve is
closing when shot lever is
released.
c. Verify dust collector has
adequate suction.
6. #3390 blasting performance
has diminished.
a. Verify there is an adequate
amount of steel shot in the shot
hopper and shot is free of concrete
dust or other contaminates.
b.Verify there are no obstructions
in the shot valve or feed spout and
the feed spout is properly aligned.
c. Verify shot valve is opening
properly.
d. Verify blast wheel and control
cage are not excessively worn.
e. Verify dust collector has
adequate suction.
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