Graco AIRPRO 312414D Operation manual

312414D
Instructions-Parts
AirPro™Pressure
Feed Airspray Gun
Conventional, HVLP, and compliant guns for specialty industrial applications.
100 psi (0.7 MPa, 7 bar) Maximum Air Inlet Pressure
300 psi (2.1 MPa, 21 bar) Maximum Fluid Inlet Pressure
See page 2for model information.
Important Safety Instructions
Read all warnings and instructions in
this manual. Save these instructions.
ti1109
ll 2 G

2312414D
Contents
Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
General Metal with Stainless Steel Tip . . . . . . . . 3
Automotive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Stain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Waterborne . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
High Wear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Adhesives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Spatter Gun . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Gun Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Conventional Guns . . . . . . . . . . . . . . . . . . . . . . . 6
HVLP Guns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Compliant Guns . . . . . . . . . . . . . . . . . . . . . . . . . 6
Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Connect Air and Fluid Lines . . . . . . . . . . . . . . . . 7
Ground the Gun . . . . . . . . . . . . . . . . . . . . . . . . . 7
Flush Before Using Equipment . . . . . . . . . . . . . . 7
Adjust Spray Pattern . . . . . . . . . . . . . . . . . . . . . . 8
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Pressure Relief Procedure . . . . . . . . . . . . . . . . . 9
Apply Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Volatile Organic Compounds (VOC) Regulation . 9
Daily Gun Maintenance . . . . . . . . . . . . . . . . . . . . . 10
General Tasks . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Flush . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Clean Gun . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Compliant Cleaning Methods . . . . . . . . . . . . . . 11
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Repair Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Graco Standard Warranty . . . . . . . . . . . . . . . . . . . 24
Graco Information . . . . . . . . . . . . . . . . . . . . . . . . . 24

Models
312414D 3
Models
General Metal Spray Guns
General Metal with Stainless Steel Tip
Automotive
Orifice
Size
in. (mm)
Conventional HVLP Compliant
Model Series
Max.
HVLP/Compliant
Air Pressure
psi (MPa, bar) Model Series
Max.
HVLP/Compliant
Air Pressure
psi (MPa, bar) Model Series
Max.
HVLP/Compliant
Air Pressure
psi (MPa, bar)
0.020 (0.5) 288726 A N/A 288935 A 19 (0.13, 1.3) 288942 A 29 (0.2, 2.0)
0.030 (0.8) 288929 A N/A 288936 A 19 (0.13, 1.3) 288943 A 29 (0.2, 2.0)
0.042 (1.1) 288930 A N/A 288937 A 19 (0.13, 1.3) 288944 A 29 (0.2, 2.0)
0.055 (1.4) 288931 A N/A 288938 A 19 (0.13, 1.3) 288945 A 29 (0.2, 2.0)
0.070 (1.8) 288932 A N/A 288939 A 19 (0.13, 1.3) 288946 A 29 (0.2, 2.0)
0.086 (2.2) 288933 A N/A 288940 A 19 (0.13, 1.3) 288947 A 29 (0.2, 2.0)
0.110 (2.8) 288934 A N/A 288941 A 19 (0.13, 1.3) 288948 A 29 (0.2, 2.0)
Orifice
Size
in. (mm)
Conventional HVLP Compliant
Model Series
Max.
HVLP/Compliant
Air Pressure
psi (MPa, bar) Model Series
Max.
HVLP/Compliant
Air Pressure
psi (MPa, bar) Model Series
Max.
HVLP/Compliant
Air Pressure
psi (MPa, bar)
0.042 (1.1) 288949 A N/A 288952 A 19 (0.13, 1.3) 288955 A 29 (0.2, 2.0)
0.055 (1.4) 288950 A N/A 288953 A 19 (0.13, 1.3) 288956 A 29 (0.2, 2.0)
0.070 (1.8) 288951 A N/A 288954 A 19 (0.13, 1.3) 288957 A 29 (0.2, 2.0)
Orifice
Size
in. (mm)
Conventional HVLP Compliant
Model Series
Max.
HVLP/Compliant
Air Pressure
psi (MPa, bar) Model Series
Max.
HVLP/Compliant
Air Pressure
psi (MPa, bar) Model Series
Max.
HVLP/Compliant
Air Pressure
psi (MPa, bar)
0.030 (0.8) 288929 A N/A -- -- -- -- -- --
0.040 (1.0) -- -- -- 289034 A 29 (0.2, 2.0) 289036 A 35 (0.24, 2.4)
0.042 (1.1) 288930 A N/A -- -- -- -- -- --
0.047 (1.2) -- -- -- 289035 A 29 (0.2, 2.0) 289037 A 35 (0.24, 2.4)
0.055 (1.4) 288931 A N/A 289541 A 29 (0.2, 2.0) 289542 A 35 (0.24, 2.4)

Models
4312414D
Stain
Waterborne
High Wear
Adhesives Spatter Gun
Orifice
Size
in. (mm)
Conventional HVLP Compliant
Model Series
Max.
HVLP/Compliant
Air Pressure
psi (MPa, bar) Model Series
Max.
HVLP/Compliant
Air Pressure
psi (MPa, bar) Model Series
Max.
HVLP/Compliant
Air Pressure
psi (MPa, bar)
0.020 (0.5) 288958 A N/A 288960 A 22 (0.15, 1.5) 288962 A 29 (0.2, 2.0)
0.030 (0.8) 288959 A N/A 288961 A 22 (0.15, 1.5) 288963 A 29 (0.2, 2.0)
0.040 (1.0) 289109 A N/A 289110 A 22 (0.15, 1.5) 289111 A 29 (0.2, 2.0)
Orifice
Size
in. (mm)
Conventional HVLP Compliant
Model Series
Max.
HVLP/Compliant
Air Pressure
psi (MPa, bar) Model Series
Max.
HVLP/Compliant
Air Pressure
psi (MPa, bar) Model Series
Max.
HVLP/Compliant
Air Pressure
psi (MPa, bar)
0.030 (0.8) 288964 A N/A 288967 A 23 (0.16, 1.6) 288970 A 23 (0.16, 1.6)
0.042 (1.1) 288965 A N/A 288968 A 23 (0.16, 1.6) 288971 A 23 (0.16, 1.6)
0.055 (1.4) 288966 A N/A 288969 A 23 (0.16, 1.6) 288972 A 23 (0.16, 1.6)
Orifice
Size
in. (mm)
Conventional HVLP Compliant
Model Series
Max.
HVLP/Compliant
Air Pressure
psi (MPa, bar) Model Series
Max.
HVLP/Compliant
Air Pressure
psi (MPa, bar) Model Series
Max.
HVLP/Compliant
Air Pressure
psi (MPa, bar)
0.059 (1.5) 288973 A N/A 288976 A 20 (0.14, 1.4) 288979 A 29 (0.2, 2.0)
0.070 (1.8) 288974 A N/A 288977 A 20 (0.14, 1.4) 288980 A 29 (0.2, 2.0)
0.086 (2.2) 288975 A N/A 288978 A 20 (0.14, 1.4) 288981 A 29 (0.2, 2.0)
Orifice Size
in. (mm)
Conventional
Model Series
Max.
HVLP/Compliant
Air Pressure
psi (MPa, bar)
0.051 (1.3) 288982 A N/A
0.070 (1.8) 288983 A N/A
Orifice Size
in. (mm)
HVLP
Model Series
Max.
HVLP/Compliant
Air Pressure
psi (MPa, bar)
0.042 (1.1) 288985 A 30 (0.21, 2.1)

Warnings
312414D 5
Warnings
The following warnings are for the setup, use, grounding, maintenance, and repair of this equip-
ment. The exclamation point symbol alerts you to a general warning and the hazard symbol refers
to procedure-specific risk. Refer back to these warnings. Additional, product-specific warnings
may be found throughout the body of this manual where applicable.
WARNING
FIRE AND EXPLOSION HAZARD
Flammable fumes, such as solvent and paint fumes, in work area can ignite or explode.
To help prevent fire and explosion:
• Use equipment only in well ventilated area.
• Eliminate all ignition sources; such as pilot lights, cigarettes, portable electric
lamps, and plastic drop cloths (potential static arc).
• Keep work area free of debris, including solvent, rags and gasoline.
• Do not plug or unplug power cords or turn lights on or off when flammable fumes
are present.
• Ground all equipment in the work area. See Grounding instructions.
• If there is static sparking or you feel a shock, stop operation immediately. Do not
use equipment until you identify and correct the problem.
• Keep a working fire extinguisher in the work area.
EQUIPMENT MISUSE HAZARD
Misuse can cause death or serious injury.
• Do not operate the unit when fatigued or under the influence of drugs or alcohol.
• Do not exceed the maximum working pressure or temperature rating of the lowest
rated system component. See Technical Data in all equipment manuals.
• Use fluids and solvents that are compatible with equipment wetted parts. See Tech-
nical Data in all equipment manuals. Read fluid and solvent manufacturer’s warn-
ings. For complete information about your material, request MSDS forms from
distributor or retailer.
• Check equipment daily. Repair or replace worn or damaged parts immediately with
genuine manufacturer’s replacement parts only.
• Do not alter or modify equipment.
• Use equipment only for its intended purpose. Call your distributor for information.
• Route hoses and cables away from traffic areas, sharp edges, moving parts, and
hot surfaces.
• Do not kink or over bend hoses or use hoses to pull equipment.
• Keep children and animals away from work area.
• Comply with all applicable safety regulations.

Gun Selection
6312414D
Gun Selection
Conventional Guns
Excellent atomization and high production
rates typically with some reduction in transfer
efficiency.
HVLP Guns
An HVLP gun is a high transfer efficiency gun
which limits the air pressure at the air cap to
10 psi (0.07 MPa, 0.7 bar) maximum. In some
areas, an HVLP gun is required for compliance
with environmental standards.
Compliant Guns
A compliant gun is a high transfer efficiency
gun which has been tested to have a transfer
efficiency greater than or equal to HVLP guns.
The Graco compliant guns have no restrictions
on air cap pressures, but the gun inlet pres-
sure must remain under the maximum compli-
ant pressure shown on pages 3-4 to remain in
compliance.
PRESSURIZED EQUIPMENT HAZARD
Fluid from the gun/dispense valve, leaks, or ruptured components can splash in the
eyes or on skin and cause serious injury.
•FollowPressure Relief Procedure in this manual, when you stop spraying and
before cleaning, checking, or servicing equipment.
• Tighten all fluid connections before operating the equipment.
• Check hoses, tubes, and couplings daily. Replace worn or damaged parts immedi-
ately.
TOXIC FLUID OR FUMES HAZARD
Toxic fluids or fumes can cause serious injury or death if splashed in the eyes or on
skin, inhaled, or swallowed.
• Read MSDS’s to know the specific hazards of the fluids you are using.
• Store hazardous fluid in approved containers, and dispose of it according to appli-
cable guidelines.
• Always wear impervious gloves when spraying or cleaning equipment.
PERSONAL PROTECTIVE EQUIPMENT
You must wear appropriate protective equipment when operating, servicing, or when in
the operating area of the equipment to help protect you from serious injury, including
eye injury, inhalation of toxic fumes, burns, and hearing loss. This equipment includes
but is not limited to:
• Protective eyewear
• Clothing and respirator as recommended by the fluid and solvent manufacturer
•Gloves
• Hearing protection
WARNING

Setup
312414D 7
Setup
Connect Air and Fluid Lines
1. Shut off the air supply.
2. Install a shutoff valve (not supplied) down-
stream of the air regulator to shut off gun
air.
3. Install an inline air filter (not supplied) to
clean and dry the gun air supply.
4. Connect a clean, dry, filtered air supply to
the air inlet fitting. See FIG. 1.
5. Connect a fluid hose to the fluid inlet fitting.
See FIG. 1.
6. Connect other end of the fluid hose to a
regulated fluid supply line.
Ground the Gun
Check your local electrical code and pump
manual for detailed grounding instructions.
Ground the spray gun through connection to a
Graco-approved grounded fluid or air supply
hose.
Flush Before Using Equipment
The equipment was tested with lightweight oil,
which is left in the fluid passages to protect
parts. To avoid contaminating your fluid with
oil, flush the equipment with a compatible sol-
vent before using the equipment. See Flush,
page 10.
At least one hose must provide a static
ground to the gun.
• Recommended 5/16 in. (7.9 mm) ID
hose, optional 3/8 in. (9.5 mm) ID hose.
• Check that your shop air provides ade-
quate air flow. See Technical Data,
page 23, for minimum cfm
requirements.
• Set shop air pressure regulator (not
supplied) according to fluid manufac-
turer’s recommendation. See maximum
compliant air pressure on air cap.
• Make sure no air restrictions, such as
low-volume cheater valves, obstruct the
air flow.
FIG. 1
air inlet fluid inlet
ti11094a

Setup
8312414D
Adjust Spray Pattern
1. Rotate the air cap to achieve desired spray
pattern. See FIG. 2.
2. To achieve full fan pattern, open the air
control valve by turning the knob fully coun-
terclockwise. See FIG. 3.
3. To create a round pattern, turn the pattern
air off by turning the air control valve fully
clockwise. See FIG. 3.
4. Trigger gun and adjust gun air pressure.
Refer to Technical Data, page 23, for inlet
air pressure recommendations.
5. To establish the correct fluid flow, turn the
fluid control valve counterclockwise until no
restriction of the trigger movement is felt,
then turn out another half turn.
6. Adjust fluid pressure to achieve desired
fluid flow rate.
7. To reduce fluid flow, turn the fluid control
valve clockwise.
8. Spray a test pattern. Evaluate the spray
pattern size and atomization.
9. To achieve a narrow spray pattern, turn air
control valve clockwise.
10.To improve atomization, reduce the fluid
flow rate. Increasing the air pressure can
improve atomization but may result in poor
Transfer Efficiency (TE) or non-compliant
operation.
FIG. 2
FIG. 3
ti4839a
fluid control valve
air control valve
ti11097a
air inlet valve
• If the fluid control valve is turned clock-
wise all the way, the gun will emit only
air.
• If you cannot achieve the correct fluid
flow with the fluid control valve, a differ-
ent sized nozzle may be necessary. For
smaller fluid flow, use the next size
smaller nozzle. For a larger fluid flow,
use the next size larger nozzle.

Operation
312414D 9
Operation
Pressure Relief Procedure
1. Turn off air and fluid supply.
2. Hold a metal part of the gun firmly to a
grounded metal pail. Trigger the gun to
relieve pressure.
Apply Fluid
1. Turn on shop air and fluid supply to the
gun. Set atomizing pressure and fluid pres-
sure with the gun fully triggered.
2. Adjust the pattern size and shape. See
page 8.
3. To achieve the best results when applying
fluid:
• Keep the gun perpendicular and
6 to 8 inches (150 to 200 mm) from object
being sprayed.
• Use smooth, parallel strokes across the
surface to be sprayed with 50% overlap.
When using the HVLP spray gun, instead of a
conventional airspray gun, you may need to
use a slightly slower hand movement and
make fewer passes with the gun to coat a part.
This is due to the reduced spray velocity pro-
duced by lower HVLP air pressures, along with
a larger fluid particle size because there is less
air to blow off solvents than is produced by
conventional airspray. Take care to avoid runs
or sags as you spray.
Volatile Organic Compounds
(VOC) Regulation
In certain states, spraying solvents that release
VOCs into the atmosphere when cleaning a
spray gun is prohibited. To comply with these
air quality laws, you must use a cleaning
method that prevents the escape of VOC
vapors into the atmosphere. See Compliant
Cleaning Methods, page 11.
Trapped air can cause the pump to cycle
unexpectedly, which could result in serious
injury from splashing or moving parts.
CAUTION
Excessive atomizing air pressure can
increase overspray, reduce transfer effi-
ciency, and result in a poor quality finish.
Regulatory agencies in some states prohibit
the operation of a spray gun above 10 psi
(69 kPa, 0.7 bar) atomizing air cap pressure.
See Troubleshooting, page 12, if you
experience an irregular pattern.

Daily Gun Maintenance
10 312414D
Daily Gun Maintenance
General Tasks
• Frequently lubricate the gun moving parts
with a drop of non-silicone oil.
• Do not disassemble the spray gun if you
are having a spray pattern problem. See
Troubleshooting, page 12, for information
on how to correct the problem.
• Follow the Pressure Relief Procedure,
page 9.
• Clean the fluid and air line filters daily.
• Check for any fluid leakage from gun and
fluid hoses.
Flush
Flush before changing colors, before fluid can
dry in the equipment, at the end of the day,
before storing, and before repairing equip-
ment. Flush at the lowest pressure possible.
Check connectors for leaks and tighten as nec-
essary. Flush with a fluid that is compatible
with the fluid being dispensed and the equip-
ment wetted parts.
1. Follow Pressure Relief Procedure,
page 9.
2. Disconnect the fluid supply hose and air
supply hose from gun.
3. Connect the solvent supply hose to the
gun.
4. Start the pump. Always use the lowest pos-
sible fluid pressure when flushing.
5. Hold a metal part of the gun firmly to a
grounded metal pail. Trigger the gun until
clean solvent dispenses.
6. Turn off solvent supply.
7. Follow Pressure Relief Procedure,
page 9,
8. Disconnect the solvent supply hose from
the gun.
Follow Pressure Relief Procedure, page 9,
when you stop spraying and before cleaning,
checking, servicing, or transporting equip-
ment. Read Warnings, page 5.
CAUTION
Solvent left in gun air passages could result
in a poor quality paint finish. Do not use any
cleaning method that may allow solvent into
the gun air passages.
• Do not point gun up while cleaning it.
• Do not wipe gun with a cloth soaked in
solvent; wring out the excess.
• Do not immerse the gun in solvent.
See Compliant Cleaning Methods,
page 11, to comply with air quality laws if
applicable.