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Repair
309293J 41
Repair
Prepare the Gun for Service
• Check all possible remedies in Troubleshooting
before disassembling the gun.
• Use a vise with padded jaws to prevent damage to
plastic parts.
• Lubricate the power supply o-ring (18a), some pack-
ing rod parts (26), and certain fluid fittings with
dielectric grease (40), as specified in the text.
• Lightly lubricate o-rings and seals with non-silicone
grease. Order Part No. 111265 Lubricant. Do not
over-lubricate.
• Only use genuine Graco parts. Do not mix or use
parts from other PRO Gun models.
• Air Seal Repair Kit 244781 is available. The kit must
be purchased separately. Kit parts are marked with
an asterisk, for example (6*).
• Fluid Seal Repair Kit 244911 is available. The kit
must be purchased separately. Kit parts are marked
with a double asterisk, for example (26a**).
1. Follow the Fluid Voltage Discharge and Ground-
ing Procedure on page 20.
2. Flush the gun, page 26.
3. Blow the fluid lines dry with air.
4. Relieve the pressure, page 20.
5. Disconnect the gun air and fluid lines at the isolation
system.
6. Remove the gun from the worksite. Repair area
must be clean.
WARNING
Fire, Explosion, and Electric Shock Hazard
To reduce the risk of a fire, explosion, or
electric shock:
• Follow the Fluid Voltage Discharge and
Grounding Procedure on page 20 and
be sure the ES ON/OFF valve is OFF
before flushing, checking, or servicing
the system and whenever you are
instructed to discharge the voltage.
• Clean all parts with a non-flammable
fluid as defined on the front cover of this
manual.
• Do not service this equipment unless you
are trained and qualified.
• Do not touch the gun nozzle or come
within 4 in. (102 mm) of the nozzle during
gun operation or until you perform the
Fluid Voltage Discharge and Ground-
ing Procedure on page 20.
WARNING
Pressurized Equipment Hazard
To reduce the risk of injury, follow the Pres-
sure Relief Procedure on page 20 before
checking or servicing any part of the system
and whenever you are instructed to relieve the pres-
sure.