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

Aerbell 33 Rotary Atomizer - Maintenance
Ransburg
29 LN-9521-00.4
W A R N I N G
† Using the RPM-419, wrench, a minimum
of 50 lb•in of torque must be applied when
tightening the bell cup onto the motor shaft
to deter the bell cup from spinning off the
shaft if the motor seizes.
† Operating the turbine motor when it is not
properly fitted to the air manifold can cause
severe damage to the motor, bell assembly
and/or operating personnel.
!
† Make sure the turbine assembly is prop-
erly seated by examining the fit between the
rear of the turbine assembly and the front
of the air manifold assembly. Any irregulari-
ty in this seam between the two assemblies
would indicate improper mounting.
Looking into the front of the motor shaft, ob-
serve the concentricity of the paint feed tube
to the inside of the motor shaft. If the paint
feed tube is off center by more than .020-.028
inches radially the motor assembly may not
be seated properly.
Do not use the four mounting bolts to pull the
turbine assembly into air manifold. This can
cause the thread to be damaged. Torque the
four mounting bolts to 15 lb • in.
C A U T I O N
!
Atomizer Bell Cup Removal
To remove the atomizer bell cup (Figure 16a, item
16), place the wrench, part number RPM-419,
over the flats on the motor shaft to lock in place.
Unscrew the bell by turning CCW with the other
hand (facing the front of the atomizer). If the
bell cannot be removed by hand, use a second
RPM-419, wrench, placed over the wrench flats
of the bell cup.
Refer to "Preventive Maintenance" in the "Main-
tenance" section for important information about
bell and shaft cleanliness. Do not install a paint
contaminated or damaged bell on the turbine shaft.
When installing the bell on the shaft, the bell should
be firmly secured by hand or use wrench, RPM-
419, and torque to 50 lb•in -0/+40 lb•in.
Turbine Removal
The turbine assembly (Figure 16a, item 10) is
removed from the Aerobell 33 atomizer after re-
moving the front shroud assembly. Four mounting
bolts (Figure 16a, item 8) will then be exposed,
which hold the turbine assembly to the air mani-
fold assembly. These are the larger socket head
screws, located toward the outer edge of the
motor housing.
Holding the turbine assembly carefully so that
it does not drop and using a 5/32 inch wrench,
remove the four mounting screws which hold
the turbine to the air manifold. Pull the turbine
assembly straight forward until it is beyond the
end of the fluid tube (Figure 16a, item 3) and the
high voltage tube (Figure 16a, item 6) is out of the
resistor block (Figure 16a, item 22).
The turbine assembly can now be replaced or
serviced as necessary.
Reassemble Note: Prior to replacing the turbine
assembly, make sure the bearing air o-ring (Figure
16a, item 11) is in place on the air manifold assem-
bly (Figure 16a, item 1). To replace the turbine
assembly, center the turbine shaft with the feed
tube, align the high voltage tube with the resistor
block, the shaping air tube with the air manifold and
push the turbine assembly slowly in. Holding the
turbine securely in place, screw the four mounting
bolts (Figure 16a, item 8) through the rear of the
turbine assembly into the air manifold assembly.
Tighten the four mounting bolts alternately to a
final torque of 15 lb•in.
Reassemble Note: When the resistor module is
installed onto the high voltage tube, an air pock-
et can form inside the resistor module passage.
This air pocket can force the resistor module out
of its seat. Take care that the resistor module is
securely seated into the rear bulkhead slot.