Ransburg RMA Dual Purge Direct A12868 - Manual (Page 61)

RMA-303 Dual Purge Direct Charge - Maintenance
LN-9267-11.3 58
MAINTENANCE
!
C A U T I O N
O-RINGS
All O-rings in this atomizer are solvent proof
except the ones on the air bearing spindle.
These O-rings must not be soaked in solvent;
if these are exposed or soaked in solvent, they
must be replaced. These O-rings are engi-
neered to provide a fit between the air bearing
spindle and it’s mating parts to reduce or elimi-
nate harmonic resonance (vibration).
Some O-rings are encapsulated. These O-
rings have a limited amount of stretch and will
not return to their original diameters if over
stretched. These O-rings are subject to being
distorted more easily than rubber O-rings, so it
is important that they be sufficiently lubricated
when mating parts are installed onto them.
They also will take a square set over time and
should be replaced periodically if mating parts
are removed repeatedly or if a new mating
part is installed onto them.
Any O-ring that is cracked, nicked, or distorted
must be replaced.
A suitable lubricant is food grade petroleum
jelly or A11545-00 Petrolatum Jell.
CLEANING PROCEDURES
! W A R N I N G
•
Electrical shock and fire hazards can ex-
ist during maintenance. MicroPak supply
must be turned off before entering the
spray area and performing any mainte-
nance procedures on the atomizer. Spray
booth fans should remain on while clean-
ing with solvents.
•
Never touch the atomizer bell while it is
spinning. The front edge of the bell can
easily cut into human skin or cut through
gloves and other materials. Be sure the
atomizer bell has stopped spinning before
attempting to touch it. Approximate time
for the bell to stop spinning after turning
off turbine drive air is three minutes.
•
Ensure high voltage is off during any
manual cleaning procedure.
In addition to the above Warning, which re-
lates to potential safety hazards, the following
information must be observed to prevent dam-
age to the equipment.
•
DO NOT immerse the RMA-303 turbine in
solvent or other liquids. Turbine components
will be damaged and warranty will be voided.
•
Bearing air must be on during all cleaning
procedures to protect the air bearing compo-
nents.
Internal Fluid Path Purge Cleaning
Cleaning the incoming paint line (from paint
supply source such as color manifold through
the fluid manifold and bell assembly): Turn off
the high voltage and turn on the color stack
trigger valve for solvent supply. With the bell
spinning, open the dump valve and flush the
incoming paint line with solvent or an air/
solvent chop. Make sure the last step of the
sequence is air to purge the dump line of re-
maining solvent. To speed the loading of the
new paint, leave the dump line open to allow
the air in front of the paint push to escape.
The length of time the dump valve is open de-