Ransburg MMA-303 Direct_Ind Charge Atomizer A12870 - Manual (Page 70)

MMA-303 Direct/Indirect Charge - Maintenance
67 LN-9269-11.3
1. The atomizer bell 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 in off and that the atomizer bell is spin-
ning before flushing through the bell.
2. If there is any remaining paint build-up on
any areas of the bell after flushing, the bell
cup should be removed for hand cleaning.
The bell's leading edge, splash plate, ser-
ration cuts, and rear of cup are some ex-
amples of areas for special attention.
Bell Cup Soaking
Bell cups and splash plates can be soaked in
a heated solution for up to 2 hours in an ultra-
sonic cleaner (120°F. 49°C maximum). Bell
cups alone may be soaked for an extended
amount of time.
BELL CUP CLEANING - DIRECT
CHARGE (Continued)
BELL CUP CLEANING - INDIRECT
CHARGE
Always verify that high voltage is 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°F (37.8°C). Since elec-
trostatic 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 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 in 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
cup should be removed for hand cleaning.
The bell's leading edge, splash plate, ser-
ration cuts, and rear of cup are some ex-
amples of areas for special attention.
3. Visually inspect the bell cup edge for signs
of abrasion. If the edge is excessively
worn or badly chipped as the result of a
collision with a part, replace the cup im-
mediately
4. Remove splash plate. Inspect for wear on
the bell cup where the fluid leaves the
large diameter of the splash plate. If any
undercut in this area, the cup should be
replaced. Also, check the three (3) pins
between the front and rear splash plate
halves. If worn, replace entire assembly.
5. Check the center holes of the splash plate
for wear. Hold splash plate up to a light
source and look straight into the holes. If
light is clearly seen, the angled holes are
worn and the splash plate must be re-
placed.
6. Splash plate assemblies may be soaked
for a short time, under 2 hours, to loosen
dried material. Clean with a soft bristle
brush. Blow out center holes to dislodge
material. Never use any kind of pick in-
strument to clean these holes.
7. Soaking the bell in solvent may aid in loos-
ening or removing paint build-up. It is
recommended that the splash plate be
removed and cleaned separately.
8. Use a soft bristle brush dipped in solvent