Shot Blasting
MODEL 1-8DEZ BLASTER
SECTION 11
TROUBLESHOOTING
51
OPERATING MANUAL
JUNE 2007
(Cont)
Trouble
Possible Cause
Remedy
Increased cleaning time.
a.
Low abrasive in
storage hopper.
b.
Contaminated
abrasive.
c.
Abrasive feed and
abrasive control valve.
d.
Wheel impeller, control
cage wear.
e.
Loss of consistent
blast pattern, “hot spot”.
f.
“Choked” wheel. (Too
much abrasive delivered
to blast wheel.)
a.
Check abrasive level.
b.
Abrasive may contain
substantial percentage of fines
and contaminants. Check
ventilation.
c.
Check for obstructions in the
abrasive feed, i.e. feed spout,
abrasive control valve, and
separator screen.
d.
Replace wheel kit.
e.
Check blast pattern. Check
the blast wheel for proper
seating with the wheel hub.
f.
Close abrasive valve and
gradually reopen. Check
abrasive valve operation.
Adjust travel limit screw on
steering handle.
Machine hang-up.
a.
Uneven work surface/
floor obstruction.
b.
Magnet setting too
low.
a.
Pull up on steering handle to
raise machine to clear small
obstructions or uneven work
surfaces. Shut abrasive valve if
obstruction cannot be cleared.
Pull back machine to clear. Use
caution when raising seal due to
high velocity abrasive exposure.
b.
See Section 8
Decrease in cleaning
surface profile.
a.
Machine travel speed
too fast.
b.
Abrasive
contaminated.
c.
Low abrasive in
storage hopper.
a.
Slow travel speed.
b.
Clean storage hopper and
replace abrasive. Check
ventilation system.
c.
Check abrasive level.
