Ransburg Aerobell 33 AER5000, AER5001 - Manual (Page 30)

Aerbell 33 Rotary Atomizer - Maintenance
Ransburg
26 LN-9521-00.4
HIGH PERFORMANCE
THERMOPLASTIC BELL
CUP PREVENTIVE
MAINTENANCE
It is the user's responsibility to ensure proper
maintenance of the atomizer bell at all times.
Bell cup failure due to inadequate cleaning or
handling will not be covered under warranty. The
"Do Not" bullets listed are some examples of
improper handling which could adversely affect
performance or personnel safety and should not
be attempted for any reason.
BELL CUP CLEANING
Always verify that high voltage is turned OFF and
that the atomizer bell is spinning before performing
any type of color change or bell flush cleaning cycle.
To reduce the risk of fire or explosion, the sol-
vents used for exterior cleaning must have flash
points above 100 o F (37.8 o C). Since electrostatic
equipment is involved, these solvents should also
be non-polar.
Solvents used for equipment flushing should, have
flash points equal to or higher than those of the
coating material being sprayed.
1. The atomizer bell includes a self-cleaning fea-
ture, and will normally be fully cleaned during a
bell flush cycle. Flushing should be done before
any down time or break in production. A bell flush
cycle may also be required while spraying batch
parts of the same color. Verify that high voltage is
OFF and that the atomizer bell is spinning before
flushing through the bell.
2. If there is any remaining paint build up on any
areas of the bell after flushing, the bell should be
removed for hand cleaning (reference "Bell Cup
Handling" listed on the back side of this data
sheet). The bell’s leading edge, paint feed holes
or slots, and serration cuts are some examples
of areas for special attention.
3. Visually inspect the bell cup edge for signs of
abrasion. If the coating is excessively worn back
(1/16 inch or more) or badly chipped as the result of
a collision with a part, replace the cup immediately.
4. Soaking the bell in solvent will not aid in loos-
ening or removing paint build up! The bell should
be dipped in an appropriate solvent or the solution
may be allowed to flow over and into the bell while
cleaning.
5. Use a soft bristle brush dipped in solvent to
remove paint build up from the serration cuts,
paint feed holes or slots, external and internal
surfaces of the bell. With a light source shinning
into the rear of the bell, any contamination in the
paint feed holes will be easily seen when viewed
from the front face.
6. A soft, lint free rag dampened with solvent may
be used to remove any paint residue from the
external and internal surfaces of the bell.
7. After removing all paint build up or residue,
rinse the bell in clean solvent and blow dry.
8. Before reinstalling the bell onto the shaft, check
the mating surfaces of the thread and taper for
any paint build up or residue. Also check the fluid
tube outside diameter and the shaft bore for any
further paint build up. These surfaces should be
cleaned before installing the bell.
9. A ring of semi-conductive coating should also be
visible just inside the bell taper, which will contact
the shaft when properly seated. If a contact area
is not found, replace the cup.
Install and tighten the bell according to the atom-
izer service manual