Ransburg MMA-303 Direct_Ind Charge Atomizer A12870 - Manual (Page 91)

MMA-303 Direct/Indirect Charge - Maintenance
LN-9269-11.3 88
cascade side of the knuckle.
Replacement
Slide the entire assembly back into the atom-
izer body. Slide fiber optic nut over transmitter
and tighten securely with fiber optic transmitter
tool (78279-00). Feel transmitter after installa-
tion. It should not be loose when properly in-
stalled.
Turbine O-Ring Replacement (“A11534-01
Turbine O-Ring Kit” figure)
Remove air bearing turbine from the atomizer.
Remove all exterior O-rings.
Lightly lubricate all O-rings with A11545 Petro-
latum Jell before reinstalling.
O-Ring Kit A11534-01 contains all required O-
rings for replacement.
CHECKING PROBES
Check atomizer voltage using the Ransburg
Test Meter Kit (76652-01 or 76652-04). Verify
that the output voltages have not varied much
from the setup standard. A drastic change in
voltage can be an early indicator of a compo-
nent or system problem. The data shown was
collected under the ideal lab conditions using a
clean atomizer and an unloaded fluid delivery
system.
The following data is for use with the MMA-
303. The output voltage measured at the bell
will normally range between 91% and 97% of
the kV set-point displayed at the control unit.
Typical setting for spraying is 70 kV.
High Voltage Ring Inspection
Examine entire ring for burning marks indicat-
ed by melted plastic or blackened areas
around or near where the electrodes are locat-
ed, the area where the high voltage input tube
is, and on the inner diameter of the ring.
If any area is found with the above conditions,
the ring must be replaced.
After verifying, clean all old dielectric grease
from the eight (8) protrusions on the front of
the ring and from the concentric circles at the
high voltage input protrusion.