Ransburg Aerobell 168 A12787 - Manual (Page 48)

Aerobell 168 - Maintenance
45 LN-9270-12.3
MAINTENANCE (continued)
Vibration Noise
If the Aerobell 168 is vibrating or making an
unusually loud noise, it usually means there is
an imbalance situation. The atomizer bell
may have dried paint on it, or the bell may be
physically damaged, or there may be paint
trapped between the bell and shaft preventing
the bell from properly seating. If any of these
conditions exist, they must be corrected. Ex-
cessive imbalance caused by one of these
conditions may result in bearing damage and
turbine failure. Warranty DOES NOT cover
failure caused by imbalanced loading condi-
tions.
To determine if the bell is dirty or damaged,
remove the bell and turn the turbine on. If the
noise is eliminated, the bell cup is the prob-
lem. If the noise continues, the turbine may
be damaged and should be inspected. Ex-
cessive air required to achieve same speed
may indicate a faulty or contaminated tur-
bine. DO NOT continue to operate a noisy
turbine.
PREVENTIVE
MAINTENANCE
See "Preventive Maintenance Schedule")
Daily/Weekly Maintenance
Due to the close proximity of high voltage to
ground potential, a schedule must be devel-
oped for equipment maintenance
(cleanliness).
Verify that high voltage is OFF and that
shaping air, bearing air, and turbine drive air
are ON.
Open the dump valve, if equipped, flushing
all paint from the supply lines and valve mod-
ule.
Open the solvent valve, if equipped, flushing
all paint from the fluid tube and through the
atomizer bell assembly.
Verify that high voltage is OFF, turbine drive
air is OFF, and that the bell cup has stopped
spinning. The bearing air and shaping air
should remain ON.
Clean all external surfaces of the applicator
using a lint-free rag dampened with solvent.
External surfaces include the shroud and
valve module.
After cleaning, all conductive residue must
be removed using a non-conductive solvent.
since electrostatic equipment is involved,
these solvent should also be non-polar.
Inspect bell cup for nicks, dents, heavy
scratches, or excessive wear. Replace if
necessary.
To reduce the risk of fire or explosion,
OSHA and NFPA-33 require that solvents
used for exterior cleaning be non-flammable
(flash points higher than 100 F/37.8 C). Also,
since electrostatic equipment is involved,
these solvents should be non-polar. Example
of non-flammable, non-polar solvents for wipe
down are: amyl acetate, methyl amyl acetate,
high flash naphtha, and mineral spirits.
a. If using a rag to hand wipe the Aerobell,
turbine air should be off, but leave shaping air
on. 70-100 SLPM for shaping air is recom-
mended.
b. Do not use conductive solvents such as .
MEK to clean the Aerobell 168
! W A R N I N G