Ransburg Aerobell M Rotary Atomizer 78101 User Manual

Page 31

LN-9237-00.1

Aerobell M Rotary Atomizer - Maintenance

Using the RPM-419, wrench, a mini-

mum 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.

Rear Shroud Removal

The rear shroud (Figure 16, item 33) can be re-
moved for cleaning or inspection of the compo-
nents on the inside of the assembly

Loosen the two captive screws (Figure 16, item
28) by turning them inward (clockwise). Slide
the shroud backward over the hoses and high
voltage cable. Note that it is not necessary to
remove the shroud completely from the hoses.
Slide it backward (over the hoses) for easy ac-
cessibility to the components such as valves.

W A R N I N G

!!!!!

Resistor Module Removal

To remove the high voltage cable from the re-
sistor module, first remove the retaining screw
(Figure 16, item 21) and slide the connector
cover (Figure 16, item 20) back over the cable.
Then loosen the strain relief nut and pull the
cable straight out of the module.

To remove the resistor module (Figure 16, item
22), follow the procedures for removal of the
rear shroud. Then slightly lift the rear of the
module to clear the step in the rear bulkhead
(Figure 17, item 12), and slide it backward until
completely separated from the forward high volt-
age tube (Figure 16, item 6).

Make sure the turbine assembly is

properly seated by examining the fit
between the rear of the turbine assembly
and the front of the air manifold assembly.
Any irregularity in this seam between the
two assemblies would indicate improper
mounting.

Looking into the front of the motor shaft,
observe 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 as-
sembly 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

!!!!!

If space parameters require that the spacing be-
tween the rear bulkhead and the mounting bar
be less than the recommended 10 to 12 inch,
the Aerobell M can be swiveled on the insulator
support so the rear shroud can be slid back
fully.

If the outside or inside surfaces of the shroud
are dirty, wipe clean with a solvent damp rag.

When reinstalling the resistor module,

care should be taken to avoid damage to
the high voltage tube. Also, make sure
the rear of the resistor module is properly
seated in the pocket before sliding the
rear shroud forward. If the resistor hous-
ing is not properly seated and the rear
shroud is forced into place, damage can
occur to the rear shroud.

C A U T I O N

!!!!!

Reassemble Note:

Reassemble Note: When the resistor module is
installed onto the high voltage tube, an air
pocket can form inside the resistor module pas-
sage. This air pocket can force the resistor
module out of its seat. Take care that the resis-
tor module is securely seated into the rear bulk-
head slot.