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ELECTRICAL TROUBLESHOOTING CHART
PROBLEM
CAUSE
SOLUTION
Low or no electrostatic
Spring at transformer end of cable
Stretch spring.
wrap. (Spraying voltage
not making good contact.
light is on all of the time).
Continued from page 10.
Electrical short in gun.
Take gun apart and visually check the
resistor holder, the resistor well and
needle well for dirt and/or damage.
Clean and replace parts required.
Faulty High Voltage Power Supply.
See instruction manual included with
High Voltage Power Supply.
Spraying voltage stays on
Gun actuating device is faulty.
Check actuating device, replace if
when gun is not actuated.
faulty.
Operator gets mild shock.
Operator not properly grounded or
Be sure floor is properly grounded.
is in contact with ungrounded
Wear shoes with non-insulating
object.
soles. Be sure operator is not in con-
tact with or carrying (in clothing) any
metalic items which could build-up
electric charge.
Gun not properly grounded.
Be sure Graco air supply hose is be-
ing used and is properly grounded.
Operator gets mild shock
Workpiece not properly grounded.
Clean workpiece hangers. Check for
when touching workpiece.
Gun Disassembly
..... - - - - - W A R N I N G - - - - - -
Installing and servicing this equipment requires ac-
cess to parts which may cause electric shock or
other serious bodily injury. Do not install or service
this equipment unless you are qualified.
Turn off the High Voltage Power Supply and
relieve all of the pressures trapped in the gun and
the lines before servicing any part of the system.
Follow the Pressure Relief Procedure on page 2.
NOTE:
Check all possible remedies in Trouble-
shooting Charts before disassembling gun.
..... ----------CAUTION--------
If the plastic parts of the gun must be held secure-
ly , ALWAYS clamp them in padded vise jaws to
prevent damage to the parts.
ALWAYS lubricate the o-rings and seals with
petroleum jelly.
ALWAYS remove the gun from worksite for ser-
vice or repair. Service or repair area must be clean.
To disconnect the gun from the High Voltage Power
Supply and the fluid supply:
1. Turn off the high voltage at the Power Supply.
2.
Turn off the line voltage input to the Power Supply.
3.
Shut off the fluid pump and actuate the gun to
relieve the pressure.
4.
Disconnect the fluid hose and air lines from the gun.
5.
Flush the gun with a compatible solvent.
proper ground on conveyor or track.
6.
Disconnect High Voltage Cable from Power Supply .
7.
Take the gun and cable assembly to the workbench
for repair.
NOTE:
Because of the high operating voltage, the
High Voltage Cable resistor tube is filled with
dielectric grease. The High Voltage Cable
should not be removed from the gun, unless
replacement or regreasing is necessary.
Electrode Resistor Replacement (See Fig 6)
Remove the air cap and fluid tip as described in the
Operation Section under Clean the Air Cap and Fluid
Tip. Remove the electrode resistor (55) with the wrench
(83d)
supplied. Install new electrode resistor with the
wrench. Do not overtighten .
r-------CAUTION - - - - - - . .
To avoid damaging the plastic threads, be very
careful when installing the electrode.
Install the air cap and fluid tip as described in the Opera-
tion Section under Clean the Air Cap and Fluid Tip.
KEY
83d Wrench
83d
Fig 6 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
307-896 11
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