Ransburg MMA-303 Direct_Ind Charge Atomizer A12870 - Manual (Page 66)

MMA-303 Direct/Indirect Charge - Maintenance
63 LN-9269-11.3
CLEANING PROCEDURES (Cont.)
!
C A U T I O N
•
The maximum flow rate of 700 cc/min. must
not be exceeded during a flush routine. Use of
an in-line fluid restrictor is recommended.
(Example: Hosco P/N RIL-6-AJ or similar).
External Atomizer Surface Cleaning
•
Verify that the high voltage is turned off.
•
All external surfaces may be cleaned using
a mild solvent and lint free rags to hand
wipe the MMA-303. Turbine drive air must
be off, but leave bearing air on. The shap-
ing air should have approximately 70 slpm
air flow through each to prevent the solvent
from entering these passages.
•
Do not spray the MMA-303 unit with a sol-
vent applicator used for cleaning. The
cleaning fluid under pressure may aid con-
ductive materials to work into hard to clean
areas or may allow fluids to be forced into
the turbine assembly.
•
Do not reuse an atomizer bell cup that
shows any sign of damage such as nicks,
heavy scratches, dents, or excessive wear.
•
Always final wipe all parts with a non-polar
solvent and wipe dry (high flash Naphtha,
etc.).
!
W A R N I N G
•
NEVER wrap the applicator in plastic to
keep it clean. A surface charge may build
up on the plastic surface and discharge to
the nearest grounded object. Efficiency of
the applicator will also be reduced and
damage or failure of the applicator compo-
nents may occur. WRAPPING THE APPLI-
CATOR IN PLASTIC WILL VOID WARRAN-
TY. To reduce the risk of fire or explosion,
OSHA and NFPA-33 require that solvents
used for exterior cleaning, including bell
cleaning and soaking, be nonflammable
(flash points higher than 100°F/
37.8° C).
Since electrostatic equipment is involved,
these solvents should also be non-polar.
Examples of non-flammable, non-polar sol-
vents for cleaning are: Amyl acetate, me-
thyl amyl acetate, high flash naphtha, and
mineral spirits.
•
Do not use conductive solvents such as
MEK to clean the external surfaces of the
MMA-303 without a second cleaning with a
non-polar solvent.
•
When using a rag to hand wipe the MMA-
303, the turbine air should be off, but leave
both the shaping air and bearing air turned
on. Ensure that rotation has come to a
complete stop.
VIBRATION NOISE
If the MMA-303 is vibrating or making an unu-
sually loud noise, it usually means there is an
imbalance situation. The atomizer bell cup
may have dried paint on it or the bell may be
physically damaged., or there may be paint
trapped between the bell cup and shaft pre-
venting the bell cup from properly seating. If
any of these conditions exist, they MUST be
corrected. Excessive imbalance caused by