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Service
Prepare the Gun for Service
WARNING
ELECTRIC SHOCK HAZARD
Installing and servicing this equipment
requires access to parts that may cause
electric shock or other serious injury if
the work is not performed properly. Do not install or
service this equipment unless you are trained and
qualified. gun.
WARNING
INJECTION HAZARD
To reduce the risk of serious injury,
including fluid injection, splashing in the
eyes or on the skin or electric shock,
always follow the Pressure Relief Procedure
Warning on page 10 before checking or servicing
any part in the system and whenever you are
instructed to relieve the pressure.
NOTE:
D Check all possible remedies in Troubleshooting
before disassembling the gun.
D If the plastic parts of the gun must be held securely,
always clamp them in padded vice jaws to prevent
damage to the parts.
D Lightly lubricate o-rings and seals with petroleum
jelly. Do not over-lubricate.
D Only use genuine Graco parts. Do not mix or use
parts from other PRO Gun models. Note that the air
cap, spray tip, and tip guard for this gun are
orange.
WARNING
Some PRO AA4500 Gun replacement parts look
similar to other PRO Gun parts but are not inter-
changeable! When servicing, do not mix or use
other PRO Gun parts that may look similar, but
have different part numbers! Use of parts other
than those specified in the PRO AA4500 Gun parts
list on page 43 could alter the grounding continuity
of the gun, cause parts to leak or rupture, or cause
the gun to malfunction and result in serious injury,
fire, explosion or property damage.
1. Flush the gun as instructed on page 18.
2. Relieve the pressure.
3. Disconnect the air and fluid lines from the gun.
4. Remove the spray gun from the worksite for
service or repair. Service or repair area must be
clean.
Tools Needed
D 2 mm Driver (included with gun)
D 4 mm Driver (included with gun)
D 9 mm Driver (included with gun)
D Adjustable Wrench
D Medium Screw Driver
D Snap Ring Pliers
D Needle Nose Pliers