Service; Read This Page Before Selvicing The Gun - Graco PRO AA4500 Instructions-Parts List Manual

Service
Read This Page Before Servicing the Gun!
WARNING
Installing and servicing this equipment require$
access to parts that may cause electrostatic shock
or other serious bodily injury if the work is not per-
equipment unless you are trained and qualified.
formed properly. Do not Install or service this
I
I
NOTE Check all possible remedies in Troubleshoot-
ing before disassembling the gun.
Flush the
Gun and
Relieve Pressure
r"
To reduce the risk of fire, explosion, or electro-
static shock, be sure the ES ON-OFF lever is
tumed to OFF before flushing the gun.
WARNING
CAUTION
Methylene chloride
is
not recommended as a
flushing or cleaning solvent with this gun as
it
will
damage nylon components.
Flush and clean the gun as described on page 16.
Follow
the
Pressure Relief Procedure Warning at
right then disconnect the air and fluid hose from the
gun.
Service Notes:
If the plastic parts of the gun must be held
in
a
vise, only use'padded vise jaws to avoid damaging
parts.
0
Always remove the gun from the worksite for serv-
ice or repair. The serviceor repair area must be
clean.
When servicing the
PRO
AA4500 Gun, make sure
you do not mix or use other PRO Gun parts that
may look similar, but have different part numbers.
See the WARNING below. Note that the air cap,
spray tip, and tip guard for this gun are orange.
Tools Needed
2 mm Socket Head Driver (included with gun)
0
4 mm Socket Head Driver (included with
gun)
9 mm Socket Head Driver (included with gun)
Adjustable Wrench
Medium Screw Driver
Snap Ring Pliers
Needle Nose Pliers
~~~~
WARNING
Pressure Relief Procedure
To
reduce the risk of serious injury, Including fluid
injection, splashing
in
the eyes or on skin, or elec-
trostatic shock, always follow this procedure
whenever the pump is shut off, when checking or
servicing any part of system, when installing
or
changing spray tips and whenever you stop
spraying.
1.
Lock the spray gun trigger safety latch. See
2.
Tum the gun's ES ON-OFF lever to the OFF
3.
Shut
off
the power to the pump.
4.
Close the bleed-type master air valve
5.
Close the air valve for the gun air supply line.
6.
Unlock the gun trigger safety latch.
7. Trigger the gun into a grounded metal waste
8.
Lock the gun trigger safety latch again.
container to relieve fluid and air pressure.
9.
Open the pump drain valve (required in sys-
tem] to help relieve fluid pressure in the dis-
placement pump. In addition, open the drain
valve connected to the fluid pressure gauge
relieve fluid pressure in the hose and gun.
(i n a system with fluid regulation) to help
Triggering the gun to relieve pressure may not
be sufficient. Have a container ready to catch
the drainage.
ready to spray again.
Fig.
3.
position.
(required in system).
10. Leave the drain valve(s) open until you are
If you suspect that the spray tip or hose is com-
pletely clogged or that pressure has not been fully
relieved after following the steps above, very
slowly loosen the hose end coupling and relieve
pressure gradually, then loosen completely. Now
clear the tip or hose obstruction.
PRO" Gun Non-interchangeable Parts
Some PRO
AA4500
Gun replacement parts look
similar to other
PRO
Gun parts but are not inter-
changeable1 When servicing, do not mix or use
other PRO Gun parts that may
look
similar, but
than those specified in the PRO
AA4500
Gun parts
have different part numbers1 Use of parts other
ity of the gun, cause parts to leak or rupture, or
list on page
39
could alter the grounding continu-
cause the gun to malfunction and result in serious
injury, fire, explosion or property damage.
WARNING
308-294 2