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.

Daily Gun Maintenance
312414D 11
Clean Gun
1. Flush, page 10.
2. Remove air cap. Trigger gun, remove noz-
zle, and soak both in a compatible solution.
3. Dip the end of a soft-bristle brush into a
compatible solvent. Do not continuously
soak the brush's bristles with solvent and
do not use a wire brush.
4. With the gun pointed down, clean the front
of the gun, using a soft-bristle brush and
solvent.
5. Scrub the air cap retaining ring, air cap,
and fluid nozzle with the soft-bristle brush.
6. Trigger the gun while you install the fluid
nozzle with the gun tool. Tighten the nozzle
securely to 155-165 in-lb (17.5-18.6 N•m)
to obtain a good seal.
7. Install the retaining ring (14) and
air cap (13b).
8. Dampen a soft cloth with solvent and wring
out the excess. Point the gun down and
wipe off the outside of the gun.
9. After cleaning the gun, lubricate the follow-
ing parts with lubricant 111265 daily:
• fluid control valve threads
• trigger pivot pin
• fluid needle shaft
Compliant Cleaning Methods
1. Place spray gun in a gun washer that com-
pletely encloses gun and components dur-
ing cleaning, rinsing, and draining.
2. Spray solvent through the spray gun into a
closed gun cleaning station.
CAUTION
• Do not submerge gun in solvent. Solvent
dissolves lubricant, dries out packings, and
clogs air passages.
• Do not use metal tools to clean air cap
holes as this may scratch them and distort
the spray pattern.
• Use a compatible solvent.
CAUTION
Trigger the gun whenever you tighten or
remove the nozzle. This keeps the needle tip
away from the nozzle seating surface and
prevents the tip from being damaged.
• To clean out air cap holes, use a soft
implement, such as a toothpick, to
avoid damaging critical surfaces.
• Clean the air cap and fluid nozzle daily,
minimum. Some applications require
more frequent cleaning.
• Do not soak the air cap retaining ring in
solvent for prolonged periods of time.

Troubleshooting
12 312414D
Troubleshooting
Problem Cause Solution
Spray Pattern Normal pattern. No action necessary.
Spray Pattern Dirty or damaged air cap or
fluid nozzle.
Rotate air cap (13) 180°.
If pattern follows air cap, prob-
lem is in air cap. Clean and
inspect. If pattern is not cor-
rected, replace air cap.
If pattern does not follow the air
cap, the problem is with the
fluid nozzle (11). Clean and
inspect the nozzle. If the pat-
tern is not corrected, replace
nozzle.
Spray Pattern Pressure too high for viscosity
of material being sprayed.
Reduce air pressure and
increase material viscosity.
Correct pattern by narrowing
fan size with the fluid control
valve (8).
Spray Pattern Dirty or distorted air horn
holes.
Clean and inspect air cap (13).
If pattern is not corrected,
replace air cap.
Right
Wrong
Heavy top
or bottom
Wrong
Split pattern
Wrong

Troubleshooting
312414D 13
Gun spitting. Air getting into paint stream. Check if fluid source is empty
and fill.
Tighten fluid nozzle (11).
Check and tighten needle
packing nut (9a).
Check fluid nozzle (11) for
damage.
Will not spray. Fluid control valve (8) turned
too far clockwise.
Adjust fluid control valve (8)
counterclockwise.
Fluid source empty. Refill.
Excessive air blowing back. Loose fluid nozzle (11). Tighten fluid nozzle (11).
Damaged fluid nozzle seal
(19).
Replace seal (19).
Gun fluid pressure is too high
with gun triggered (cannot
achieve desired flow rate).
Using needle/nozzle kit with
too small orifice.
Use needle/nozzle kit with
larger orifice.
Using a low fluid pressure set-
ting, the fluid flow is too high,
making it necessary to restrict
needle travel to reduce fluid
flow.
Using needle/nozzle kit with
too large orifice.
Use needle/nozzle kit with
smaller orifice.
Fluid system will not operate at
low enough pressure [below
10 psi (70 kPa, 0.7 bar)].
There is no fluid regulator, or
air regulator is not sensitive
enough at low pressure.
Add low pressure fluid regula-
tor, or add more sensitive low
pressure air regulator.
Fluid flow is fluttering while
spraying.
1. Fluid filter clogged.
2. Fluid source empty.
1. Check fluid filter.
2. Refill
Fluid flow fades while spraying
high viscosity fluids.
Air hose size is too restricted
for higher air flow being used.
Use 5/16 in. (7.9 mm) I.D. air
hose if the hose is 25 ft (7.6 m)
long. If longer hose is needed,
use a 3/8 in. (9.5 mm) I.D.
hose.
Problem Cause Solution

Repair
14 312414D
Repair
See Parts, page 16, for callout references.
Disassembly
1. Unscrew retaining ring (14) to remove air
cap (13b). Check o-rings (13a and 13c)
and replace if necessary.
2. Trigger gun while unscrewing nozzle (11) to
prevent needle damage.
3. Check o-ring (19) and replace if necessary.
4. Remove fluid control valve (8), spring (26),
needle (9), and nut (7). Inspect. Replace
tip (9c), needle (9), and u-cup seal (20) as
necessary. If replacing needle tip, use low
strength thread adhesive on needle tip
threads.
5. Remove spring (28) and push the air valve
assembly (6) out the back of the gun.
Inspect. Replace air valve assembly (6)
and u-cup seal (20) as necessary. Use
tool (33) to install u-cup seal.
6. Remove trigger nut (22), trigger pin (21),
wave washer (18), and trigger (10).
7. Unscrew needle packing nut (17) and
remove u-cup packing (16) and
spreader (15).
8. Remove air control valve assembly (5).
Inspect and replace as necessary.
9. Remove air inlet valve assembly (27).
Inspect and replace as necessary.
Follow Pressure Relief Procedure, page 9.
Do not remove the fluid inlet fitting. It was
attached to the gun body with permanent
thread locker. There is also no need to
remove the air inlet fitting.

Repair
312414D 15
Reassembly
1. Install air control valve assembly (5) with
valve turned fully counterclockwise to out-
ermost position. Torque to 85-90 in-lb
(9.6-10.2 N•m).
2. Install air inlet valve assembly (27) with
valve turned fully counterclockwise to out-
ermost position. Torque to 85-90 in-lb
(9.6-10.2 N•m).
3. Lubricate u-cup spreader (15) and u-cup
packing (16). Install spreader (15) with
tapered end facing rear of gun. Install u-cup
packing (16) with open end facing front of
gun. Install packing nut (17). Torque to
3 in-lb (0.3 N•m).
4. Install wave washer (18) with cupped side
toward the gun body. Lubricate and apply
thread retainer to trigger pin (10). Install
trigger (10), trigger pin (21), and trigger
nut (22). Torque to 15-20 in-lb
(1.7-2.3 N•m).
5. Install air valve assembly (6), spring (28),
and nut (7). Torque to 175-185 in-lb
(19.8-20.9 N•m).
6. Install needle (9) and spring (26). Lightly
lubricate and install fluid control valve (8).
7. Trigger gun while replacing nozzle (11).
Torque to 155-165 in-lb (17.5-18.6 N•m).
8. Install air cap assembly (13) and retaining
ring (14).
1516
17
ti11226a

Parts
16 312414D
Parts
11
Pull trigger before installing nozzle (11).
Insert spreader (15) with tapered end facing rear of gun.
Insert u-cup (16) with open end facing front of gun.
Apply lubricant.
Apply low strength thread retainer.
Apply thread sealant.
Torque to 85-90 in-lbs (9.6-10.2 N•m).
Torque to 15-20 in-lbs (1.7-2.2 N•m).
Torque to 175-185 in-lbs (19.8-20.9 N•m).
Torque to 155-165 in-lbs (17.5-18.6 N•m).
Install with valve assembly turned fully
counterclockwise to outermost position.
Torque to 205-215 in-lbs (23.2-24.3 N•m).
Torque to 3 in-lbs (0.3 N•m).
1
2
3
4
5
6
7
8
9
10
11
12
13c
13b
11
19
21
18
1
20652820
7
14
13a
10
36
27
23
8
26
9a
9b
9c 22
15
17
16
6
10
3
223
7
8
3
4
3
4
91
3
3
33
3
3
6
11
11
12
10
4
ti11194a

Parts
312414D 17
★Included in Gun Repair Kit 289399.
✖Included in Trigger Repair Kit 289143
(contains 5 of each part).
+ Included in Needle Packing Repair Kit
289455 (contains 5 of each part).
* Included in Air Valve Repair Kit 289407.
◆Included in Air Cap Seal Kit 289791
(contains 5 of each part).
✓Included in Retaining Ring Kit 289079.
❖Included in Gun Body Kit 289016.
---Not sold separately.
Ref. Part Description Qty.
1❖289016 BODY, gun 1
5 289796 VALVE, air control
assembly 1
6★* 289038 VALVE, air, assembly 1
7* 289052 NUT, air valve, u-cup
assembly 1
8 289097 VALVE, fluid control 1
9see
p. 20-22 NEEDLE, assembly (includes 9a-9c) 1
9a --- NUT, needle 1
9b --- NEEDLE 1
9c see
p. 20-22 TIP, needle 1
10 289140 TRIGGER, gun 1
11 see
p. 20-22 NOZZLE, fluid, pressure feed 1
13 see
p. 20-22 AIR CAP, assembly (includes 13a-13c) 1
13a★◆✓ --- WASHER 1
13b★◆✓ --- O-RING 1
13c see
p. 20-22 AIR CAP 1
14✓--- RING, retaining 1
15★+--- SPREADER, u-cup 1
16★+--- PACKING, u-cup 1
17 289793 NUT 1
18✖--- WASHER, wave 1
19★111457 PACKING, o-ring 1
20★*--- PACKING, u-cup, gun 2
21✖--- PIN, pivot 1
22✖--- PIN, pivot, nut 1
23 289451 FITTING, air inlet 1
26* --- SPRING, compression 1
27 289142 VALVE, assembly,
air inlet 1
28* --- SPRING, compression 1
29 289794 TOOL, gun 1
33★*--- TOOL, installation,
seal 1
36 289452 NUT, air plug
(not assembled) 1

Parts
18 312414D

Accessories
312414D 19
Accessories
Repair Kits
Air Valves and Regulators
Cups
Cleaning Kits
Test Gauges
Hoses
Part No. Description
289455 Needle Packing Repair Kit
289399 Gun Repair Kit
289791 Air Cap Seal Kit
289143 Trigger Repair Kit
289407 Air Valve Repair Kit
289079 Retaining Ring Kit
289016 Gun Handle Replacement Kit
288986 Gun without needle, nozzle, or air
cap, with 3/8 npsm (R3/8-19) fluid
inlet
289419 Gun without needle, nozzle, or air
cap, with 1/4 npsm (R1/4-19) fluid
inlet
Part No. Description
234784 Air Control Valve with Gauge
235119 Gun Air Regulator Assembly
239655 Swivel Air Valve
Part No. Description
239802 1 qt SST Pressure Cup with
Single Air Regulator
239803 1 qt SST Pressure Cup with
Double Air Regulator
239804 1 qt SST Pressure Cup with
Remote Air Regulator
240266 Disposable Polyethylene Cup
Liners (40 pack), for 1 qt siphon
and pressure cups only
235117 2 qt Pressure Cup with
Regulator and Hose
Part No. Description
105749 Cleaning Brush
111265 Gun Lubricant
15C161 Ultimate Gun Cleaning Kit
Part No. Description
289803 HVLP Automotive Verification
289563 HVLP General Metal 0.5 - 1.8 mm
(0.020-0.070 in.) Verification
289564 HVLP General Metal 2.2 mm
(0.086 in.) Verification
289565 HVLP General Metal 2.8 mm
(0.110 in.) Verification
289566 HVLP Stain Verification
289567 HVLP Waterborne Verification
289568 HVLP High Wear 1.5 mm
(0.059 in.) Verification
289569 HVLP High Wear 1.8-2.2 mm
(0.070-0.086 in.) Verification
Part No. Description
239631 4 ft Air Whip Hose Assembly
(5/16 in.)
239636 15 ft Air Hose Assembly (5/16 in.)
239637 25 ft Air Hose Assembly (5/16 in.)
239622 4 ft Fluid Whip Hose Assembly
(3/16 in.)
239633 15 ft Fluid Hose Assembly
(3/16 in.)
239634 25 ft Fluid Hose Assembly
(3/16 in.)

Repair Kits
20 312414D
Repair Kits
General Metal Spray Guns
Model Spray Type
Nozzle Size
in. (mm)
Air Cap Kit
(13a-13c)
Nozzle
Kit
(11, 19)
Needle
Assembly Kit
(9a-9c)
Needle/
Nozzle Kit
(9a-9c, 11, 19)
Needle Tip
Kit
(9c, 5-pack)
288726 Conventional 0.020 (0.5) 289773 289061 289270 289458 289350
288929 Conventional 0.030 (0.8) 289773 289062 289271 289459 288183
288930 Conventional 0.042 (1.1) 289773 289063 289785 289460 288184
288931 Conventional 0.055 (1.4) 289773 289064 289799 289462 288185
288932 Conventional 0.070 (1.8) 289784 289065 289799 289464 288185
288933 Conventional 0.086 (2.2) 289068 289066 289787 289466 289004
288934 Conventional 0.110 (2.8) 289069 289067 289800 289467 289007
288935 HVLP 0.020 (0.5) 289041 289061 289270 289458 289350
288936 HVLP 0.030 (0.8) 289041 289062 289271 289459 288183
288937 HVLP 0.042 (1.1) 289041 289063 289785 289460 288184
288938 HVLP 0.055 (1.4) 289041 289064 289799 289462 288185
288939 HVLP 0.070 (1.8) 289041 289065 289799 289464 288185
288940 HVLP 0.086 (2.2) 289070 289066 289787 289466 289004
288941 HVLP 0.110 (2.8) 289043 289067 289800 289467 289007
288942 Compliant 0.020 (0.5) 289042 289061 289270 289458 289350
288943 Compliant 0.030 (0.8) 289042 289062 289271 289459 288183
288944 Compliant 0.042 (1.1) 289042 289063 289785 289460 288184
288945 Compliant 0.055 (1.4) 289042 289064 289799 289462 288185
288946 Compliant 0.070 (1.8) 289042 289065 289799 289464 288185
288947 Compliant 0.086 (2.2) 289044 289066 289787 289466 289004
288948 Compliant 0.110 (2.8) 289045 289067 289800 289467 289007
General Metal with Stainless Steel Tip
Model Spray Type
Nozzle Size
in. (mm)
Air Cap Kit
(13a-13c)
Nozzle
Kit
(11, 19)
Needle
Assembly Kit
(9a-9c)
Needle/
Nozzle Kit
(9a-9c, 11, 19)
Needle Tip
Kit
(9c, 5-pack)
288949 Conventional 0.042 (1.1) 289773 289063 289272 289461 289010
288950 Conventional 0.055 (1.4) 289773 289064 289273 289463 289013
288951 Conventional 0.070 (1.8) 289784 289065 289273 289465 289013
288952 HVLP 0.042 (1.1) 289041 289063 289272 289461 289010
288953 HVLP 0.055 (1.4) 289041 289064 289273 289463 289013
288954 HVLP 0.070 (1.8) 289041 289065 289273 289465 289013