Low vol, Disassembl – Ransburg Aerobell M Rotary Atomizer 78101 User Manual

Page 29

LN-9237-00.1

Aerobell M Rotary Atomizer - Maintenance

Make sure that no solvent or other

contamination is allowed to enter the
motor assembly (air bearing and outer
shaft).

• Release the rear cover fasteners and slide the
shroud back to expose the fluid manifold and
regulator. Visually inspect for signs of fluid
leaks around fluid connections and manifold.
Correct problem and clean paint from all compo-
nents, including internal portion of shroud.

• Reinstall rear shroud, bell cup, and front
shroud. Rewrap the outer housing and insulator
mounting rod (refer to "Disassembly Proce-
dures" for definite instructions).

W A R N I N G

!!!!!

LOW VOL

LOW VOLT

TAGE TEST

AGE TEST

When replacing the resistive components,
troubleshooting, reassembling or as periodic in-
spection procedure, a "low voltage" test can be
performed on the rotator assembly to ensure
that there are good electrical contacts and that
the resistors are not defective. A high voltage
resistor tester (Megger) must be used which has
an output voltage of 500 to 1000 VDC.

With the high voltage turned OFF, dis-
connect the high voltage cable from the
rear of the rotator assembly.

Insert a test cable or the test meter
probe into the rear of the rotator and
connect to the voltage output of the test
meter.

Remove the front shroud and bell cup
and clip the test meter ground to the ro-
tator shaft.

The outer protective wrap may have to

be replaced more frequently than weekly.
Daily inspection of the amount of paint
buildup on the wrap will determine the fre-
quency of replacement.

NOTE

using a tube brush and solvent. Clean the outer
surfaces of the feed tube.

Set the test meter voltage output to a
minimum of 500 VDC and maximum of
1000 VDC.

The meter should indicate between ap-
proximately 725 Megohm and 770 Me-
gohm. If the test instrument is reading
higher than 770 Megohm, then the elec-
trical contacts between the resistor tube,
resistor block and motor assembly need
to be checked.

Remove the motor assembly and resis-
tor tube and verify that the resistor tube
springs are at least 3/8" and are not dis-
torted. Also make sure that there is no
visible contamination in the motor cavity
where the resistor tube inserts.

Refer also to the "Troubleshooting Guide" (Fig-
ure 15).

DISASSEMBL

DISASSEMBLY

PROCEDURES

Make sure the following conditions exists prior
to disassembly:

• Pay particular attention to the procedures and
Warning information, outlined under "Cleaning
Procedures", prior to performing any maintenance.

• The air to all supply and pilot lines is off.

• The high voltage power supply has been shut off.

• The atomizer’s valves, feed tube, bell cup and
fluid supply lines have been cleaned with sol-
vent and purged dry with air.

• The bell cup has stopped rotating.

• All external surfaces must be clean and free of
paint or paint residue.

For reassembly instructions, use the

reverse of the following disassembly pro-
cedures.

NOTE