Ransburg MMA-570 Direct_Ind Charge Atomizer A13366 - Manual (Page 54)

Bell Cup Replacement
Bell cup wear is dependent on many factors such
as bell speed, flow rate, and type of coating being
applied.
The bell cups shown in the photos indicates if a bell
cup has some useable life or should be replaced.
Photo 1 shows a bell cup that has some useable
life. The grooves worn around the splash plate
pins are shallow. The general appearance of the
cup surface is smooth and uninterrupted. Photo
2 shows a bell cup that needs to be replaced, as
well as the splash plate that was installed into the
cup. The grooves are deep, a visible groove exists
at the outer edge diameter of the splash plate and
there are noticeable lateral grooves extending
towards the outer edge of the cup.
Photo 1
Photo 2
LATERAL LINES
OR GROOVES
DEEP
GROOVES
SMOOTH CLEAN
UNINTERUPTED
BELL CUP
SURFACE
LIGHT VISIBLE WEAR
NEAR SPLASH PLATE
OUTER EDGE
SLIGHT, SHALLOW
GROOVES
6. Splash plate assemblies may be soaked for a
short time, under 2 hours, to loosen dried ma-
terial. Clean with a soft bristle brush. Blow out
center holes to dislodge material. Never use
any kind of pick instrument to clean these holes.
7. Soaking the bell in solvent may aid in
loosening 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
to remove paint build-up from the serra-
tion cuts, paint feed holes or slots, and
external and internal surfaces of the bell.
9. 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.
10. After removing all paint build-up or residue,
rinse the bell in clean solvent and blow dry.
11. Before reinstalling the bell on the shaft, check
the mating surfaces of the thread and taper for
any paint build-up or residue. Also, check the
fluid tip, fluid tube outside diameter, and the shaft
for any further paint build-up. These surfaces
should be cleaned before installing the bell.
12. It is recommended that extra bell cups be
purchased. The cups can then be cleaned
off line in an automated cup cleaner.
13. Reinstall cups to proper torque 50-70 lbs•in
(5.65-7.91 Nm).
Inspection of Bell Cups
s
MMA-570 Direct/Indirect Charge - Maintenance
Ransburg
LN-9279-13 51