Graco 308640E HIGH PRESSURE AIR-ASSISTED AIRLESS Model AA Plus Spray Gun Owner's Manual

INSTRUCTIONS-PARTS LIST
308–640
Rev. E
Supersedes Rev. D
This manual contains important
warnings and information.
READ AND KEEP FOR REFERENCE.
INSTRUCTIONS
HIGH PRESSURE AIR-ASSISTED AIRLESS
Model AA Plus Spray
Gun
4000 psi (28 MPa, 280 bar) Maximum Working Fluid Pressure
100 psi (0.7 MPa, 7 bar) Maximum Working Air Pressure
Part No. 238–402, Series A
Spray Gun with standard spray tip, tip guard, air cap,
and 1/4–18 npsm (R1/4–19) air line fitting.
Part No. 238–851, Series B
Spray Gun with AA Reverse-A-Clean (RAC) assembly and 1/4–18 npsm (R1/4–19) air line fitting.
Part No. 238–852, Series A
Spray Gun with standard spray tip, tip guard, air cap,
and quick-disconnect air line fitting.
Part No. 238–883, Series A
Hi-Flow Spray Gun with Hi-Flow fluid needle and diffuser-seat, and standard spray tip, tip guard, air cap,
and 1/4–18 npsm (R1/4–19) air line fitting.
Part No. 239–001, Series B
Hi-Flow Spray Gun with Hi-Flow fluid needle and diffuser-seat, AA Reverse-A-Clean (RAC) assembly, and
1/4–18 npsm (R1/4–19) air line fitting.
05985
Part No. 238–402 Spray Gun shown
U.S. Patent Nos. 3,843,052; 4,386,739; 5,285,965
United Kingdom Patent No. 2 111 406 B
Patented 1984 Canada
Brevete 1984
French Patent No. 82–21202
Patents Pending
Foreign Patents Pending
Table of Contents
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Spray Pattern Troubleshooting . . . . . . . . . . . . . . . . . . 13
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Spray Tip Selection Chart . . . . . . . . . . . . . . . . . . . . . . 20
GRACO INC.
Air Caps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Graco Phone Number . . . . . . . . . . . . . . . . . . . . . . . . . .
P.O. BOX 1441 MINNEAPOLIS, MN
COPYRIGHT 1996, GRACO INC.
Graco Inc. is registered to I.S. EN ISO 9001
55440–1441
20
24
24
25
28
28
WARNING
INJECTION HAZARD
Spray from the gun, hose leaks, or ruptured components can inject fluid into your body and cause an
extremely serious injury, including the need for amputation. Splashing fluid in the eyes or on the skin
can also cause a serious injury.
Fluid injected into the skin might look like just a cut, but it is a serious injury. Get immediate medical attention.
Do not point the spray gun at anyone or at any part of the body.
Do not put hand or fingers over the spray tip.
Do not stop or deflect fluid leaks with your hand, body, glove, or rag.
Do not “blow back” fluid; this is not an air spray gun.
Always have the tip guard on the spray gun when spraying.
Check the gun diffuser operation weekly.
Be sure the gun trigger safety operates before spraying.
Lock the gun trigger safety when you stop spraying.
Follow the Pressure Relief Procedure on page 7 whenever you: are instructed to relieve pressure; stop spraying; clean, check, or service the equipment; or install or clean the spray tip.
Tighten all the fluid connections before operating the equipment.
Check the hoses, tubes, and couplings daily. Replace worn, damaged, or loose parts immediately.
Permanently coupled hoses cannot be repaired; replace the entire hose.
FIRE AND EXPLOSION HAZARD
Improper grounding, poor air ventilation, open flames, or sparks can cause a hazardous condition and
result in fire or explosion and serious injury.
Ground the equipment and the object being sprayed. See Ground the System on page 6.
Provide fresh air ventilation to avoid the buildup of flammable fumes from solvent or the fluid being
sprayed.
Extinguish all the open flames or pilot lights in the spray area.
Electrically disconnect all the equipment in the spray area.
Keep the spray area free of debris, including solvent, rags, and gasoline.
Do not turn on or off any light switch in the spray area while operating or if fumes are present.
Do not smoke in the spray area.
Do not operate a gasoline engine in the spray area.
If there is any static sparking while using the equipment, stop spraying immediately. Identify and
correct the problem.
2
308–640
WARNING
EQUIPMENT MISUSE HAZARD
INSTRUCTIONS
Equipment misuse can cause the equipment to rupture, malfunction, or start unexpectedly and result
in serious injury.
This equipment is for professional use only.
Read all instruction manuals, tags, and labels before operating the equipment.
Use the equipment only for its intended purpose. If you are uncertain about usage, call your Graco
distributor.
Do not alter or modify this equipment. Use only genuine Graco parts and accessories.
Check the equipment daily. Repair or replace worn or damaged parts immediately.
Do not exceed the maximum working pressure of the lowest rated system component. This equipment has a 4000 psi (28 MPa, 280 bar) maximum working pressure at 100 psi (0.7 MPa, 7 bar)
maximum incoming air pressure.
Route the hoses away from the traffic areas, sharp edges, moving parts, and hot surfaces. Do not
expose Graco hoses to temperatures above 180F (82C) or below –40F (–40C).
Do not use the hoses to pull the equipment.
Use only Graco approved hoses. Do not remove hose spring guards, which help protect the hose
from rupture caused by kinks or bends near the couplings.
Use fluids or solvents that are compatible with the equipment wetted parts. See the Technical
Data section of all the equipment manuals. Read the fluid and solvent manufacturer’s warnings.
Wear hearing protection when operating this equipment.
Comply with all applicable local, state and national fire, electrical and other safety regulations.
TOXIC FLUID HAZARD
Hazardous fluids or toxic fumes can cause serious injury or death if splashed in the eyes or on the
skin, swallowed, or inhaled.
Know the specific hazards of the fluid you are using. Read the fluid manufacturer’s warnings.
Store hazardous fluid in an approved container. Dispose of hazardous fluid according to all local,
state and national guidelines.
Wear the appropriate protective clothing, gloves, eyewear and respirator.
RECOIL HAZARD
Due to the very high pressure fluid emitted, a strong recoil action will occur when you trigger this gun.
If you are unprepared, your hand could be forced back toward your body or you could lose your balance and fall, resulting in serious injury.
308–640
3
Installation
C
L
P
J
A
X
V
D
C
T
B
K
Q
S
W
R
F
H
M
G
E
KEY
A
B
C*
D
E*
F
G
Air Line Filter
Air Line Lubricator
Bleed-type Air Shutoff Valve
Pump Air Regulator
Fluid Drain Valve
Fluid Shutoff Valve
Fluid Filter
H*
J
K
L
M
N
P
Q*
N
Grounded Fluid Hose
Pump
Air Line
Air Pressure Regulator
Pump Fluid Inlet
In-line Fluid Filter
Pattern Adjustment Valve Knob
Fluid Pressure Regulator
E
R
S
T
V*
W
X
Pressure Gauge
Trigger Safety
Pump Runaway Valve
Pump Ground Wire
Gun Fluid Connector
Air Shutoff Valve
05986
*Equipment required for safe operation of the
system. Must be purchased separately.
Fig. 1
Typical Installation
The typical installation shown in Fig. 1 is only a guide
for selecting and installing air-assisted airless spray
systems. It is not an actual system design. Contact
your Graco distributor for assistance in designing a
system to meet your needs.
Ventilate the Spray Booth
WARNING
TOXIC FLUID HAZARD
To prevent hazardous concentrations of
toxic and/or flammable vapors, spray
only in a properly ventilated spray booth.
Never operate the spray gun unless ventilation
fans are operating.
Check and follow all of the National, State and
Local codes regarding air exhaust velocity requirements.
4
308–640
Installation
Connect the Air Line
1. Install an air line filter (A) to ensure a clean, dry air
supply to the gun. Dirt and moisture in the line can
ruin the appearance of your finished piece. See
Fig. 1.
2. Install an air pressure regulator (L) on the gun air
supply line to control the air pressure to the gun.
3. Install an air pressure regulator (D) on the pump
air supply line to control air pressure to the pump.
4. Install a bleed-type air shutoff valve (C) on the
main air line and on the pump air line, downstream
of the pump air regulator, to shut off air to the
pump. Install an additional bleed-type valve on
each pump air supply line to relieve air trapped
between this valve and the pump after the air
regulator is shut off.
WARNING
The bleed-type air shutoff valve is required in your
system to relieve air trapped between this valve
and the pump after the air regulator is closed.
Trapped air can cause the pump to cycle unexpectedly, which could result in serious injury.
NOTE:
Connect the Fluid Line
WARNING
INJECTION HAZARD
To reduce the risk of property damage or
serious injury, including fluid injection,
which could be caused by component
rupture or unrelieved fluid pressure,
A fluid drain valve(s) (E) is required in your
system to assist in relieving fluid pressure in the
displacement pump, hose and gun; triggering
the gun to relieve pressure may not be sufficient.
A fluid pressure regulator (Q) must be installed
in the system if the pump’s maximum working
pressure exceeds the gun’s maximum fluid
working pressure of 4000 psi (28 MPa, 280
bar).
1. Install a fluid filter (G) and drain valve(s) (E) close
to the pump’s fluid outlet. The drain valve assists
in relieving fluid pressure in the displacement
pump, hose, and gun. See Fig. 1.
2. Install a fluid pressure regulator (Q) to control fluid
pressure to the gun.
Part No. 238–402, 238–851, 238–883, and
239–001 Guns: The gun air inlet has a 1/4–18
npsm (R1/4–19) compound male thread that is
compatible with NPSM and BSP female swivel
connectors.
Part No. 238–852 Gun: The gun air inlet has a
1/4–18 npsm quick-disconnect fitting.
NOTE: Some applications require fine-tuned control of
fluid pressure. You can control fluid pressure more
accurately with a fluid pressure regulator than by
regulating the air pressure to the pump.
5. Install an air shutoff valve (X) on each gun air
supply line, downstream of the gun air regulator, to
shut off air to the gun(s).
4. Install an in-line fluid filter (N) on the gun fluid
fitting (W) to avoid clogging the spray tip with
particles from the fluid.
6. Connect the air hose (K) from the air supply to the
gun air inlet.
5. Connect the grounded fluid hose (H) to the gun
fluid fitting (W) or optional in-line filter (N).
3. Install a fluid shutoff valve (F) to shut off the fluid
supply to the gun.
308–640
5
Installation
Ground the System
WARNING
FIRE AND EXPLOSION HAZARD
Improper grounding could cause static
sparking, which could cause a fire or
explosion. To reduce the risk of property
damage or serious injury, follow the
grounding instructions below.
The following grounding instructions are minimum
requirements for a system. Your system may include
other equipment or objects which must be grounded.
Check your local electrical code for detailed grounding
instructions for your area and type of equipment. Your
system must be connected to a true earth ground.
1. Pump: Ground the pump by connecting a ground
wire and clamp between the fluid supply and a true
earth ground as instructed in your separate pump
instruction manual.
2. Air compressors and hydraulic power supplies: Ground them according to the manufacturer
recommendations.
6
308–640
3. Air, fluid, and hydraulic hoses connected to
the pump: Use only grounded hoses with a maximum of 500 feet (150 m) combined hose length to
ensure grounding continuity. Check the electrical
resistance of your air and fluid hoses at least once
a week. If the resistance exceeds the recommended limits, replace the hose immediately.
4. Spray gun: Ground the gun by connecting it to a
properly grounded fluid hose and pump.
5. Fluid supply container: Ground it according to
local code.
6. Object being sprayed: Ground it according to
local code.
7. All solvent pails used when flushing: Ground
them according to local code. Use only metal pails,
which are conductive. Do not place the pail on a
non-conductive surface, such as paper or cardboard, which interrupts the grounding continuity.
8. To maintain grounding continuity when flushing or relieving pressure: Always hold a metal
part of the gun firmly to the side of a grounded
metal pail, then trigger the gun.
Operation
Safety
WARNING
INJECTION HAZARD
Remember, this is not an air spray gun.
For your safety be sure to read and
follow the Warnings on pages 2 and 3
and throughout the text of this instruction manual.
Keep the wallet sized warning card 179–960,
provided with the gun, with the operator of this
equipment at all times. The card contains important
treatment information should an injection injury
occur. Additional cards are available at no charge
from Graco.
Pressure Relief Procedure
WARNING
5. Hold a metal part of the gun firmly to the side of a
grounded metal waste container and trigger the
gun to relieve the fluid pressure.
6. Lock the gun trigger safety again.
7. Open the pump drain valve (required in the system) to help relieve fluid pressure in the displacement pump. In addition, open the drain valve
connected to the fluid pressure gauge (in a system
with fluid regulation) to help relieve fluid pressure
in the hose and gun. Triggering the gun to relieve
pressure may not be sufficient. Have a container
ready to catch the drainage.
8. Leave the drain valve(s) open until you are ready
to spray again.
9. If you suspect that the spray tip or hose is completely 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 the coupling
completely. Now clear the tip or hose obstruction.
INJECTION HAZARD
The system pressure must be manually
relieved to prevent the system from
starting or spraying accidentally. Fluid
under high pressure can be injected through the
skin and cause serious injury. To reduce the risk of
an injury from injection, splashing fluid, or moving
parts, follow the Pressure Relief Procedure
whenever you:
are instructed to relieve the pressure,
stop spraying,
check or service any of the system equipment,
or install or clean the spray tip.
Trigger Safety
Locked or in
ON SAFE Position
1. Lock the spray gun trigger safety to avoid accidentally triggering the gun. See Fig. 2.
2. Shut off the power to the pump.
Trigger Safety Unlocked
or in OFF SAFE Position
3. Close the bleed-type master air valve (required in
the system).
4. Unlock the gun trigger safety.
05987
Fig. 2
308–640
7
Operation
How the Air-Assisted Airless
Spray Gun Operates
The air-assisted airless spray gun combines airless
and air spraying concepts. The spray tip shapes the
fluid into a fan pattern, as does a conventional airless
spray tip. Air from the air cap further atomizes the fluid
and completes the atomization of the paint tails into
the pattern to produce a more uniform pattern. The
width of the pattern can be slightly adjusted by the
pattern adjustment valve.
Note that the air-assisted airless spray gun differs from
an air spray gun in that increasing the pattern air
reduces the pattern width. To increase the pattern
width, less pattern air or a larger size tip must be used.
The spray gun has a built-in lead and lag operation.
When triggered, the gun begins emitting air before the
fluid is discharged. When the trigger is released, the
fluid stops before the air flow stops. This helps assure
the spray is atomized and prevents fluid buildup on the
air cap.
Install a Spray Tip
WARNING
INJECTION HAZARD
To reduce the risk of a fluid injection
injury, follow the Pressure Relief Procedure on page 7 before removing or
installing a spray tip.
Install a spray tip in the gun. The air cap and spray tip
position determines the direction of the spray pattern.
Rotate the air cap (the spray tip rotates with it) as
needed for the desired spray pattern direction. See
Fig. 3.
NOTE: If the gun has the AA RAC assembly, handtighten the air cap retaining ring, while holding the
orange tip guard in the desired direction. If the retaining ring is over-tightened, the spray tip will be difficult
to rotate.
Vertical Spray Pattern
Horizontal Spray Pattern
Select a Spray Tip and Air Cap
The fluid output and pattern width depend on the size
of the spray tip, the fluid viscosity, and the fluid pressure. Use the Spray Tip Selection Chart, on page 20,
as a guide for selecting an appropriate spray tip for
your application.
8
308–640
Fig. 3
05991
Operation
Adjust the Spray Pattern
WARNING
RECOIL HAZARD
Due to the very high pressure fluid
emitted, a strong recoil action will occur
when you trigger this gun. If you are
unprepared, your hand could be forced back
toward your body or you could lose your balance
and fall, resulting in serious injury.
For a narrower pattern, turn the pattern adjustment
valve knob clockwise. If the pattern is still not
narrow enough, increase the air pressure to the
gun slightly or use a different size tip.
NOTE:
Pattern adjustment is not available with guns
with the AA RAC assembly as the air separator, part no. 178–414, must be removed when
the RAC assembly is installed.
For some spray tips, when the line air pressure to the gun is increased to a certain level,
the spray pattern will become round. This is
the smallest pattern width. Further increases in
air pressure will force the pattern to turn from
horizontal to vertical or from vertical to
horizontal.
WARNING
INJECTION HAZARD
To reduce the risk of component rupture
and serious injury, including injection, do
not exceed the gun’s maximum fluid
working pressure of 4000 psi (28 MPa, 280 bar) or
the maximum working pressure of the lowest rated
component in the system.
Pattern
Adjustment
Knob
1. Set the fluid pressure with the fluid regulator. Do
not turn on the air supply yet.
2. Trigger the gun to check the atomization; do not be
concerned about the pattern shape yet.
0789A
Fig. 4
3. Increase the fluid pressure just to the point where
a further increase in fluid pressure does not significantly improve fluid atomization.
4. Close the pattern adjustment valve by turning the
knob (see Fig. 4) counterclockwise all the way.
This sets the gun for its widest pattern.
5. Set the atomizing air pressure at about 10 psi (0.7
bar, 70 kPa). Check the spray pattern, then adjust
the air pressure until the tails are completely
atomized and pulled into the spray pattern. See
Fig. 5. Do not exceed 100 psi (0.7 MPa, 7 bar) air
pressure to the gun.
No Air
Too Little Air
Right Amount
of Air
0792
Fig. 5
308–640
9
Operation
Apply the Fluid
When applying the fluid, keep the gun a consistent
distance, about 8 to 12 inches (200 to 300 mm) from
the surface of the object being sprayed. Always hold
the gun at a right angle from the surface. Do not make
an arc with the gun as it causes an uneven coat of
fluid. See Fig. 6.
CAUTION
Openings in the tip guard reduce paint buildup on the
guard while spraying. Damage to the sharp edges of
the openings will cause paint to collect at that area.
To avoid damage, never hang the gun by the tip
guard.
RIGHT
WRONG
Fig. 6
10
308–640
0793A
Operation
Clean the Spray Gun and System Daily
WARNING
INJECTION HAZARD
To reduce the risk of an injection injury
or splashing fluid in the eyes or on the
skin:
Follow the Pressure Relief Procedure on page
7 before cleaning, removing, or installing a
spray tip and whenever you are instructed to
relieve pressure.
Do not wipe fluid buildup off the gun or spray tip
until pressure is relieved.
CAUTION
To avoid damaging the gun:
Never immerse the gun in solvent as this could
damage packings and allow solvent in the air
passages.
Do not use fluids containing halogenated
hydrocarbons to clean the gun body as HHC is
not compatible with aluminum.
Methylene Chloride is not recommended as a
flushing or cleaning solvent with this gun or any
device with nylon or aluminum components.
Do not use metal tools to clean holes in the air
cap or spray tip.
4. If using an in-line filter, remove and clean it
thoroughly in a compatible solvent.
5. Clean the system’s fluid filter and air line filter.
Check the Diffuser-seat Operation Weekly
WARNING
INJECTION HAZARD
The gun diffuser-seat breaks up spray
when the gun is sprayed without the
spray tip installed, such as during flushing. This reduces the risk of an injection injury.
Check the diffuser-seat operation weekly.
1. Relieve the pressure as instructed on page 7.
2. Remove the tip guard and spray tip.
3. Start the pump and operate it at its lowest pressure.
4. Hold a metal part of the gun firmly against a
grounded metal waste container, and trigger the
gun. See Fig. 7. If the fluid coming from the gun is
not diffused into an irregular stream, replace the
diffuser-seat immediately.
1
ÄÄÄÄ
ÄÄÄÄ
ÄÄÄÄ
ÄÄÄÄ
NOTE: Clean the front of the tip frequently during the
day to help reduce buildup. AA RAC style tips require
more frequent cleaning.
1. Relieve the pressure as instructed on page 7.
2. Clean the outside of the gun and the tip guard with
a soft cloth dampened with compatible solvent.
3. To avoid damaging the spray tip and air cap, clean
them with a compatible solvent and soft brush. To
clean the air cap passages, use a soft brush or
other soft tool. Dry the parts with an air blow gun.
1
Maintain firm metal-to-metal contact between the gun and a
grounded metal container.
05988
Fig. 7
308–640
11
Operation
Flush the Gun Daily
WARNING
INJECTION HAZARD
To reduce the risk of a fluid injection
injury, follow the Pressure Relief Procedure on page 7 before cleaning,
removing, or installing a spray tip and whenever
you are instructed to relieve pressure.
WARNING
To reduce the risk of serious injury, including
splashing fluid in the eyes or on the skin, or static
electric discharge when flushing:
Be sure the entire system, including flushing
pails, are properly grounded.
Remove the tip guard and spray tip.
Maintain metal-to-metal contact between the
gun and a grounded metal waste container. See
Fig. 7, page 11.
Use the lowest possible pressure.
NOTE:
Flush the pump and gun before the fluid can dry in
it.
If it is available, the flushing procedure provided in
the pump or sprayer manual should be used
instead of this procedure.
12
308–640
1. Relieve the pressure as instructed on page 7.
2. Disconnect the atomizing air hose and the fluid
supply line.
3. Remove the tip guard or AA RAC assembly (11),
air cap or RAC housing (13), and spray tip (14).
Refer to the parts drawing for your gun model
(page 16 or 18).
4. Clean the parts.
5. Connect a compatible solvent supply to the gun.
6. Start the pump and operate it at its lowest pressure.
7. Hold a metal part of the gun firmly against a
grounded metal waste container, and trigger the
gun until all the paint is removed from the gun
passages.
8. Relieve the pressure as instructed on page 7.
9. Disconnect the solvent supply.
NOTE: If the gun is being used with plural component
materials, remove the needle cartridge and thoroughly
clean it with a soft brush to ensure that the material
does not cure in the spring area and make the gun
inoperable. See page 14 to remove the needle cartridge.
Troubleshooting
WARNING
INJECTION HAZARD
To reduce the risk of a fluid injection
injury, follow the Pressure Relief Procedure on page 7 before checking or
servicing any of the system equipment and whenever you are instructed to relieve pressure.
NOTE:
Check all possible remedies in the troubleshooting
charts before disassembling the gun.
Some improper patterns are caused by the
improper balance between air and fluid.
General Troubleshooting
Problem
Cause
Solution
Fluid leakage from back of fluid
needle
Worn packings or needle shaft
Replace external needle packings or
entire fluid needle cartridge. See
page 14.
Air leakage from front of gun
Air valve not seating properly
Clean/service air valve. See page 14.
Fluid leakage from front of gun
Fluid needle worn or damaged
Replace fluid needle cartridge. See
page 14.
Worn diffuser-seat housing
Replace the diffuser-seat and gasket.
The gasket must be replaced whenever the diffuser-seat is removed.
See page 14.
Fluid tip seal leaking
Tighten or replace fluid tip.
Leaking around diffuser-seat housing
Replace the diffuser-seat gasket. The
gasket must be replaced whenever
the diffuser-seat is removed. See
page 14.
Fluid inlet fitting leaking
Replace the fluid fitting gasket. The
gasket must be replaced whenever
the fluid fitting is removed. See
page 15.
Fluid buildup on fluid needle cartridge
components.
Remove and clean or replace the
fluid needle cartridge. See page 14.
Fluid in air passages
Slow fluid shut-off
Spray Pattern Troubleshooting
Problem
Cause
Solution
Fluttering or spitting spray
Insufficient fluid supply
Adjust fluid regulator or fill fluid supply
tank.
Air in paint supply line
Check, tighten siphon hose connections, bleed air from paint line.
Attempting to “feather” (partially trigger) the gun.
Cannot “feather” with an AA gun.
Feathering will cause drastic reduction of pressure at the tip, resulting in
poor atomization and/or spitting.
Fluid build-up or spray tip partially
plugged
Clean spray tip. See page 11.
On defective side of pattern, air horn
holes are partially or totally plugged
Clean air horn holes with solvent and
soft brush. See page 11.
Air horn holes partially or totally
plugged
Clean air horn holes with solvent and
soft brush. See page 11.
308–640
13
Irregular pattern
Pattern pushed to one side, same
side of air cap gets dirty
Service
WARNING
INJECTION HAZARD
To reduce the risk of a fluid injection
injury, follow the Pressure Relief Procedure on page 7 before checking or
servicing any of the system equipment and whenever you are instructed to relieve pressure.
NOTE:
Follow the Service Notes in Fig. 8 when reassembling the gun. Refer to the parts drawing for your
gun model (page 16 or 18) for parts not shown in
Fig. 8.
Repair Kits are available. See page 17 or 19 for the
kits for your gun model.
Air Valve Service
1. Relieve the pressure as instructed on page 7.
2. Remove the trigger (3) and valve cap (7). See the
parts drawing and Fig. 8.
3. Unscrew the needle nut (23) while holding the flats
(C) of the air valve (26) stem with a long nose
pliers.
CAUTION
To avoid leakage, be careful not to scratch the air
valve stem.
4. Remove the spring (6) and air valve (26).
5. If there is air leakage at the air valve (26), unscrew
the packing nut (24) and carefully remove the
u-cup packing (25). Replace packing if worn or
damaged. When re-installing, be sure the u-cup
faces inward.
6. If leakage occurs internally or the front of the gun
leaks air when it’s not triggered, clean and inspect
the air valve and the spring for wear or damage.
Replace as needed.
7. For best air valve life, lubricate the external air
valve stem (C) with light oil after each day’s use.
14
308–640
Fluid Needle Cartridge Service
Follow the procedure below to remove the fluid needle
cartridge for cleaning or for replacement.
1. Relieve the pressure as instructed on page 7.
2. Remove the tip guard or AA RAC assembly (11),
air cap or RAC housing (13), spray tip (14), and air
separator (16 – part no. 238–402, 238–852, and
238–883 guns only). See Fig. 8.
3. Trigger the gun to back the fluid needle ball off the
seat. Remove the diffuser-seat (15).
4. Remove the trigger (3) and trigger extension
pieces (19). See the Parts Drawing, page 16.
5. To remove the fluid needle cartridge (10), slide the
notch of the packing tool (34) around the small
diameter of the trigger guide (A) and pull the
cartridge toward the front of the gun.
6. Remove the fluid gasket (18).
7. If the fluid needle cartridge was removed for
cleaning, remove the external o-ring (10a) and
backup ring (10b). Clean the needle cartridge
thoroughly with a compatible solvent and a soft
brush. Install a new o-ring (10a) and backup ring
(10b).
8. Lubricate the o-ring (10a) and backup ring (10b) of
the new or cleaned needle cartridge with lightweight oil.
9. Insert the fluid needle cartridge into the front end
of the gun body. Use the packing tool (34) to pull
back on the cartridge until it snaps into place; the
cartridge must be bottomed out in the gun body
insert. If the cartridge is seated properly, the
needle cartridge washer (B) will be visibly seated
flat through the back end of the gun body insert.
10. Insert a new gasket (18).
11. Install the gun trigger and trigger extension pieces.
12. Lubricate the diffuser-seat (15) thread. Trigger the
gun while screwing the diffuser-seat back into the
gun. Torque the diffuser-seat to 23 to 27 ft-lbs (31
to 37 Nm).
13. Install the gun air separator (part no. 238–402,
238–852, and 238–883 guns only), spray tip, air
cap or RAC housing, and tip guard or AA RAC
assembly.
NOTE: If the gun has the AA RAC assembly, handtighten the air cap retaining ring, while holding the
orange tip guard in the desired direction. If the retaining ring is over-tightened, the spray tip will be difficult
to rotate.
Service
5
11
12
4
11
5a
7
4
Part No. 238–402 Spray Gun shown
10
7
14
11
6
16
13
26
12
25
14
B
10b
10a
5
3
9
15
18
6
24
12
12
17
13
A 23
C
8
10
4
2
9
1
30
AIR
SERVICE NOTES:
2
FLUID
8
U-cup lips face inward
9
Torque to 23–27 ft-lb (31–37 Nm)
10
Torque to 20–24 ft-lb (27–32 Nm)
Lubricate threads
11
Torque to 15–19 ft-lb (20–26 Nm)
4
Apply anaerobic pipe sealant to threads
12
5
Lubricate with light-weight oil
Apply high strength sealant to threads
13
Do not lubricate
14
If the gun has the AA RAC assembly, tighten the air cap
retaining ring until it bottoms out, while holding the orange tip
guard in the desired direction.
05989
1
Gasket (18) must be replaced if diffuser-seat (15) is removed
or replaced to avoid fluid leakage
2
Gasket (17) must be replaced if fluid connector (30) is removed
or replaced to avoid fluid leakage
3
6
7
Fig. 8
Thread nut to bottom thread of needle
Use tool (34) to pull needle cartridge until it bottoms in gun
body front end insert.
308–640
15
Parts
Part No. 238–402, 238–852, and 238–883
12
14
13
5
11
5a
5b
1
8
7
25
6
24
26
23
10
10b
10a
16
19
18
3
15
9
17
4
30
34
29
3
2
1
2
5
6
2
SERVICE NOTES (See Fig. 8 for additional information):
1
Lubricate threads
2
Torque to 23–27 ft-lb (31–37 Nm)
3
Gasket (18) must be replaced if diffuser-seat (15) is removed or
replaced to avoid fluid leakage.
16
308–640
05990A
4
Gasket (17) must be replaced if fluid connector (30) is removed or
replaced to avoid fluid leakage.
5
Included with Gun 238–402 and 238–883 only.
6
Included with Gun 238–852 only.
Parts
Use Only Genuine Graco Parts and Accessories
Part No. 238–402, 238–852, and 238–883
Repair Kits
Ref.
No.
Part No.
Description
1
2
238–750
106–917
BODY, gun
ADAPTER, air; Included with Gun
1
224–949
238–402 and 238–883 only
1
Gun Repair
Kit
113–367
Qty.
COUPLING, air, quick-disconnect;
Included with Gun 238–852 only
3
5
276–429
217–489
5a
5b
6
7
8
168–110
105–456
106–903
178–408
203–953
TRIGGER, gun
VALVE, pattern adjustment;
Includes items 5a and 5b
9
10
187–562
238–754
238–755
10a
10b
11
12
13
14
15
111–516
111–517
238–248
107–079
238–628
GG4–XXX
238–427
224–855
16
17
18
19
23
24
25
26
29
30
31Y
34
35Y
178–414
178–422
187–521
224–868
187–504
178–765
105–452
217–487
238–228
191–026
222–385
187–737
172–479
S O-RING, nitrile rubber
S RETAINER, clip
SPRING, compression, air valve
CAP, valve, air
CAP SCREW, hex hd, 10-24 x
0.375” long
PIN, pivot
NEEDLE, fluid; Included with Guns
238–402 and 238–852 only; Includes
replaceable items 10a and 10b
NEEDLE, fluid, hi-flow; Included
with Gun 238–883 only; Includes
replaceable items 10a and 10b
S O-RING; CV75
S RING, backup; PTFE r
TIP GUARD
O-RING, PTFE
AIR CAP
SPRAY TIP; Customer’s choice;
See Chart on page 20. Includes
Kit No. and
D
Description
i ti
Includes:
Ref. No.
5a
Part No.
168–110
Description
O-Ring
5b
105–456
Retainer
6
106–903
Spring
10
238–754
Needle
10a
111–516
O-Ring
10b
111–517
Backup Ring
12
107–079
O-Ring
15
238–427
Diffuser-seat
17
178–422
Gasket
18
187–521
Gasket
25
105–452
U-Cup
26
217–487
Valve
235–304
10
238–754
Needle
Fluid Section
Repair Kit
10a
111–516
O-Ring
10b
111–517
Backup Ring
15
238–427
Diffuser-seat
17
178–422
Gasket
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
18
187–521
Gasket
238–739*
5a
168–110
O-Ring
Hi-flow Gun
Repair Kit
5b
105–456
Retainer
6
106–903
Spring
10
238–755
Needle
10a
111–516
O-Ring
10b
111–517
Backup Ring
12
107–079
O-Ring
15
224–855
Diffuser-seat
17
178–422
Gasket
18
187–521
Gasket
25
105–452
U-Cup
26
217–487
Valve
238–738*
10
238–755
Needle
Hi-flow Fluid
Section
Repair Kit
10a
111–516
O-Ring
10b
111–517
Backup Ring
15
224–855
Diffuser-seat
17
178–422
Gasket
18
187–521
Gasket
replacement gasket 183–616
1
DIFFUSER-SEAT; Included with Gun
238–402 and 238–852 only
1
DIFFUSER-SEAT, hi-flow; Included
with Gun 238–883 only
1
SEPARATOR, air
1
GASKET, fluid, Delrinr;
1 sent unassembled
2
GASKET, fluid; acetal homopolymer
(black), 1 sent unassembled
2
TRIGGER EXTENSION
2
1
NUT, needle
1
NUT, packing, air
U-CUP, PTFE
1
1
VALVE, air
GUARD, trigger
1
1
CONNECTOR, fluid
1
WARNING CARD (not shown)
1
TOOL, needle assembly
1
TAG, instruction (not shown)
Y Replacement Warning labels, tags and cards are
available at no cost.
* Must be used with tips larger than 0.025 in. (0.635 mm).
308–640
17
Parts
Part No. 238–851 and 239–001
5
14
13
5
11
5a
14
1
8
5b
7
6
25
26
24
23
10
10b
10a
19
6
3
18
15
9
17
4
30
29
3
2
2
34
1
SERVICE NOTES (See Fig. 8 for additional information):
1
Lubricate threads
2
Torque to 23–27 ft-lb (31–37 Nm)
3
Gasket (18) must be replaced if diffuser-seat (15) is removed or replaced to avoid fluid leakage.
4
Gasket (17) must be replaced if fluid connector (30) is removed or replaced to avoid fluid leakage.
5
Black gasket with orange dot
6
Solid black gasket
18
308–640
06759A
Parts
Use Only Genuine Graco Parts and Accessories
Part No. 238–851 and 239–001
Repair Kits
Ref.
No.
Part No.
Description
1
2
3
5
238–750
106–917
276–429
217–489
BODY, gun
ADAPTER, air
TRIGGER, gun
VALVE, pattern adjustment;
Includes items 5a and 5b
S O-RING, nitrile rubber
S RETAINER, clip
SPRING, compression, air valve
CAP, valve, air
CAP SCREW, hex hd, 10-24 x
0.375” long
PIN, pivot
NEEDLE, fluid; Included with Gun
5a
5b
6
7
8
9
10
168–110
105–456
106–903
178–408
203–953
187–562
238–754
238–755
10a
10b
11
13
14
15
17
18
19
23
24
25
26
29
30
31Y
34
35Y
Qty.
1
1
1
239–176
Gun Repair
Kit
1
1
1
1
1
1
1
238–851 only; Includes replaceable
items 10a and 10b
1
NEEDLE, fluid, hi-flow; Included with
Gun 239–001 only; Includes
replaceable items 10a and 10b
1
1
S O-RING; CV75
1
S RING, backup; PTFE r
AA RAC TIP GUARD/
AIR CAP ASSY.
1
1
192–096 RAC HOUSING
AAR–XXX AA RAC SPRAY TIP; Customer’s
choice. See Chart on page 22.
1
239–172 DIFFUSER-SEAT; Included with Gun
238–851 only
1
239–173 DIFFUSER-SEAT, hi-flow; Included
with Gun 239–001 only
1
178–422 GASKET, fluid, Delrinr;
1 sent unassembled
2
187–521 GASKET, fluid; acetal homopolymer
(black), 1 sent unassembled
2
2
224–868 TRIGGER EXTENSION
1
187–504 NUT, needle
1
178–765 NUT, packing, air
105–452 U-CUP, PTFE
1
1
217–487 VALVE, air
1
238–228 GUARD, trigger
1
191–026 CONNECTOR, fluid
222–385 WARNING CARD (not shown)
1
1
187–737 TOOL, needle assembly
1
172–479 TAG, instruction (not shown)
111–516
111–517
238–701
Kit No. and
D
Description
i ti
Includes:
Ref. No.
5a
Part No.
168–110
Description
O-Ring
5b
105–456
Retainer
6
106–903
Spring
10
238–754
Needle
10a
111–516
O-Ring
10b
111–517
Backup Ring
15
239–172
Diffuser-seat
17
178–422
Gasket
18
187–521
Gasket
25
105–452
U-Cup
26
217–487
Valve
239–178
10
238–754
Needle
Fluid Section
Repair Kit
10a
111–516
O-Ring
10b
111–517
Backup Ring
15
239–172
Diffuser-seat
17
178–422
Gasket
18
187–521
Gasket
239–177*
5a
168–110
O-Ring
Hi-flow Gun
Repair Kit
5b
105–456
Retainer
6
106–903
Spring
10
238–755
Needle
10a
111–516
O-Ring
10b
111–517
Backup Ring
15
239–173
Diffuser-seat
17
178–422
Gasket
18
187–521
Gasket
25
105–452
U-Cup
26
217–487
Valve
239–179*
10
238–755
Needle
Hi-flow Fluid
Section
Repair Kit
10a
111–516
O-Ring
10b
111–517
Backup Ring
15
239–173
Diffuser-seat
17
178–422
Gasket
18
187–521
Gasket
* Must be used with tips larger than 0.025 in. (0.635 mm).
Y Replacement Warning labels, tags and cards are
available at no cost.
308–640
19
Spray Tip Selection Charts
NOTE: Part No. 238–755 Fluid Needle and 224–855 Diffuserseat must be used with GG4 tips larger than 0.025 in. (0.635
mm).
Standard Spray Tips, for use with Air Cap 238–628
Orifice
Size
inches
(mm)
Fan Width
at 12”
(300 mm)
Inches
(mm)
*Light
Light to
Medium
Viscosity
fl oz/min
(liters/min)
0.007
(0.178)
2–4
(50–100)
4.0
(0.1)
0.009
(0.229)
0.011
(0.279)
0.013
(0.330)
20
*Heavy
y
Viscosity
fl oz/min
(liters/min)
Part No.
No
GG4–107
4–6
(100–150)
GG4–207
6–8
(150–200)
GG4–307
2–4
(50–100)
7.0
(0.2)
GG4–209
6–8
(150–200)
GG4–309
8–10
(200–250)
GG4–409
10–12
(250–300)
GG4–509
10.0
(0.3)
GG4–211
6–8
(150–200)
GG4–311
8–10
(200–250)
GG4–411
10–12
(250–300)
GG4–511
12–14
(300–350)
GG4–611
13.0
(0.4)
GG4–213
6–8
(150–200)
GG4–313
8–10
(200–250)
GG4–413
10–12
(250–300)
GG4–513
12–14
(300–350)
GG4–613
14–16
(350–400)
GG4–713
308–640
*Light to
Medium
Viscosity
0.015
(0.381)
4–6
(100–150)
17.0
(0.5)
0.017
(0.432)
GG4–111
4–6
(100–150)
4–6
(100–150)
Fan Width
at 12
12”
(300 mm)
GG4–109
4–6
(100–150)
2–4
(50–100)
Orifice
Size
0.019
(0.483)
*Heavy
Heavy
Viscosity
Part No.
GG4–215
6–8
(150–200)
GG4–315
8–10
(200–250)
GG4–415
10–12
(250–300)
GG4–515
12–14
(300–350)
GG4–615
14–16
(350–400)
GG4–715
16–18
(400–460)
GG4–815
4–6
(100–150)
22.0
(0.7)
17.0
(0.5)
GG4–217
6–8
(150–200)
GG4–317
8–10
(200–250)
GG4–417
10–12
(250–300)
GG4–517
12–14
(300–350)
GG4–617
14–16
(350–400)
GG4–717
16–18
(400–460)
GG4–817
18–20
(457–508)
GG4–917
4–6
(100–150)
28.0
(0.8)
21.0
(0.6)
GG4–219
6–8
(150–200)
GG4–319
8–10
(200–250)
GG4–419
10–12
(250–300)
GG4–519
12–14
(300–350)
GG4–619
14–16
(350–400)
GG4–719
16–18
(400–460)
GG4–819
18–20
(457–508)
GG4–919
Spray Tip Selection Charts
Standard Spray Tips, for use with Air Cap 238–628
Orifice
Size
Fan Width
at 12
12”
(300 mm)
*Light to
Medium
Viscosity
*Heavy
Heavy
Viscosity
0.021
(0.533)
6–8
(150–200)
35.0
(1.0)
27.0
(0.8)
0.023
(0.584)
0.025
(0.635)
0.027
(0.686)
Part No.
GG4–321
Orifice
Size
Fan Width
at 12
12”
(300 mm)
*Light to
Medium
Viscosity
*Heavy
Heavy
Viscosity
0.029
(0.737)
8–10
(200–250)
68.0
(1.9)
59.0
(1.7)
Part No.
GG4–429
GG4–629
12–14
(300–350)
8–10
(200–250)
GG4–421
10–12
(250–300)
GG4–521
12–14
(300–350)
GG4–621
12–14
(300–350)
GG4–631
14–16
(350–400)
GG4–721
18–20
(457–508)
GG4–931
16–18
(400–460)
GG4–821
18–20
(457–508)
GG4–921
16–18
(400–460)
GG4–833
GG4–423
18–20
(457–508)
GG4–933
8–10
(200–250)
40.0
(1.2)
34.0
(0.97)
0.031
(0.787)
0.033
(0.838)
8–10
(200–250)
12–14
(300–350)
78.0
(2.2)
88.0
(2.5)
GG4–431
69.0
(2.0)
GG4–633
79.0
(2.3)
10–12
(250–300)
GG4–523
12–14
(300–350)
GG4–623
10–12
(250–300)
GG4–535
14–16
(350–400)
GG4–723
12–14
(300–350)
GG4–635
16–18
(400–460)
GG4–823
16–18
(400–460)
GG4–835
18–20
(457–508)
GG4–923
18–20
(457–508)
GG4–935
8–10
(200–250)
50.0
(1.5)
42.0
(1.2)
GG4–425
0.035
(0.889)
8–10
(200–250)
98.0
(2.8)
GG4–435
89.0
(2.5)
0.037
(0.940)
14–16
(350–400)
108.0
(3.1)
99.0
(2.8)
GG4–737
0.039
(0.991)
8–10
(200–250)
118.0
(3.4)
109.0
(3.1)
GG4–439
10–12
(250–300)
GG4–525
12–14
(300–350)
GG4–625
10–12
(250–300)
GG4–539
14–16
(350–400)
GG4–725
12–14
(300–350)
GG4–639
16–18
(400–460)
GG4–825
16–18
(400–460)
GG4–839
6–8
(150–200)
58.5
(1.7)
50.0
(1.4)
GG4–327
*Fluid output at 600 psi (4.1 MPa, 41 bar).
8–10
(200–250)
GG4–427
10–12
(250–300)
GG4–527
Fluid output (Q) at other pressures (P) can be calculated by this
formula: Q = (0.041) (QT) ( P ).
12–14
(300–350)
GG4–627
Where QT = Fluid output (fl oz/min) from the above table for
the selected orifice size.
16–18
(400–460)
GG4–827
NOTE: Other tips are available on special work order. Allow 4
to 6 weeks for delivery.
308–640
21
Spray Tip Selection Charts
Standard Sealer T
Air Cap 238–628
ips,
for use with
NOTE: Part No. 238–755 Fluid Needle and 224–855 Diffuserseat must be used with GG4 tips larger than 0.025 in. (0.635
mm).
AA Reverse-A-Clean (AA RAC) Spray Tips
Orifice
Size
inches
(mm)
Fan Width
at 12”
(300 mm)
Inches
(mm)
*Light
Light to
Medium
Viscosity
fl oz/min
(liters/min)
0.011
(0.279)
6–8
(150–200)
10.0
(0.3)
*Heavy
y
Viscosity
fl oz/min
(liters/min)
Part No.
No
AAR–311
8–10
(200–250)
AAR–411
10–12
(250–300)
AAR–511
12–14
(300–350)
AAR–611
Orifice
Size
inches
(mm)
*Light
Light to
Medium
Viscosity
fl oz/min
(liters/min)
*Heavy
y
Viscosity
fl oz/min
(liters/min)
0.025
(0.635)
50.0
(1.5)
42.0
(1.2)
GG4–025
0.029
(0.737)
50.0
(1.5)
42.0
(1.2)
GG4–029
50.0
(1.5)
42.0
(1.2)
GG4–031
8–10
(200–250)
AAR–413
0.031
(0.787)
50.0
(1.5)
42.0
(1.2)
GG4–035
10–12
(250–300)
AAR–513
0.035
(0.889)
12–14
(300–350)
AAR–613
Part No.
No
0.015
(0.381)
*Fluid output at 600 psi (4.1 MPa, 41 bar).
AA Reverse-A-Clean (AA RAC) Spray Tips
AA RAC
Tip Guard/Air
Cap Assy.
238–701
Housing
192–096
Fluid Seat
181–603
0.013
(0.330)
0.017
(0.432)
Gasket
113–910
Tip Cylinder
(full spray
position)
NOTE:
AA RAC Spray Tips include a metal fluid seat and a black
plastic gasket, marked with an orange dot.
The air separator (item 16) must be removed when using
the AA RAC.
AA RAC Conversion Kits are available. See page 25.
0.019
(0.483)
0.021
(0.533)
6–8
(150–200)
6–8
(150–200)
AAR–313
13.0
(0.4)
AAR–315
17.0
(0.5)
8–10
(200–250)
AAR–415
10–12
(250–300)
AAR–515
12–14
(300–350)
AAR–615
6–8
(150–200)
22.0
(0.7)
17.0
(0.5)
AAR–317
8–10
(200–250)
AAR–417
10–12
(250–300)
AAR–517
12–14
(300–350)
AAR–617
6–8
(150–200)
28.0
(0.8)
21.0
(0.6)
AAR–319
8–10
(200–250)
AAR–419
10–12
(250–300)
AAR–519
12–14
(300–350)
AAR–619
8–10
(200–250)
35.0
(1.0)
27.0
(0.8)
AAR–421
10–12
(250–300)
AAR–521
12–14
(300–350)
AAR–621
Continued on the next page.
22
308–640
Spray Tip Selection Charts
AA Reverse-A-Clean (AA RAC) Spray Tips
Orifice
Size
Fan Width
at 12
12”
(300 mm)
*Light to
Medium
Viscosity
*Heavy
Heavy
Viscosity
0.023
(0.584)
8–10
(200–250)
40.0
(1.2)
34.0
(0.97)
0.025
(0.635)
0.027
(0.686)
0.029
(0.737)
0.031
(0.787)
Part No.
AAR–423
Orifice
Size
Fan Width
at 12
12”
(300 mm)
*Light to
Medium
Viscosity
*Heavy
Heavy
Viscosity
0.033
(0.838)
8–10
(200–250)
88.0
(2.5)
79.0
(2.3)
Part No.
AAR–433
10–12
(250–300)
AAR–523
10–12
(250–300)
AAR–533
12–14
(300–350)
AAR–623
12–14
(300–350)
AAR–633
8–10
(200–250)
50.0
(1.5)
42.0
(1.2)
AAR–425
0.035
(0.889)
8–10
(200–250)
98.0
(2.8)
AAR–435
89.0
(2.5)
10–12
(250–300)
AAR–525
10–12
(250–300)
AAR–535
12–14
(300–350)
AAR–625
12–14
(300–350)
AAR–635
8–10
(200–250)
58.5
(1.7)
50.0
(1.4)
AAR–427
0.037
(0.940)
8–10
(200–250)
108.0
(3.1)
AAR–437
99.0
(2.8)
10–12
(250–300)
AAR–527
10–12
(250–300)
AAR–537
12–14
(300–350)
AAR–627
12–14
(300–350)
AAR–637
8–10
(200–250)
68.0
(1.9)
59.0
(1.7)
AAR–429
0.039
(0.991)
8–10
(200–250)
118.0
(3.4)
109.0
(3.1)
AAR–439
10–12
(250–300)
AAR–529
10–12
(250–300)
AAR–539
12–14
(300–350)
AAR–629
12–14
(300–350)
AAR–639
8–10
(200–250)
78.0
(2.2)
69.0
(2.0)
AAR–431
10–12
(250–300)
AAR–531
12–14
(300–350)
AAR–631
*Fluid output at 600 psi (4.1 MPa, 41 bar).
308–640
23
Dimensions
Technical Data
AA
CC
BB
Maximum Working Fluid Pressure . . . . . . . . . . 4000 psi
(28 MPa, 280 bar)
Maximum Working Air Pressure . . . . . . . . . . . . . 100 psi
(0.7 MPa, 7 bar)
Maximum Working Fluid Temperature . 120_ F (49_ C)
Weight (less filter) . . . . . . . . . . . . . . . . . 1.33 lb (0.59 Kg)
Fluid Inlet . . . . . . . . . . . . . . . . . . . . . . . . . . . 1/4–18 npsm
Air Inlet
Part No. 238–402, 238–851, 238–883, and
239–001 Guns:
1/4–18 npsm (R1/4–19) compound male thread
Part No. 238–852 Gun:
1/4–18 npsm quick-disconnect fitting.
Wetted Parts . . . . . . Stainless Steel, Carbide,
Ultra
High Molecular Weight Polyethylene, CV75 r, PTFE r, Delrin r,
CHEMTEMPt
PTFE r and Delrinr are registered trademarks of the
Company.
CV75r is a registered trademark of the International Seal
Co., Inc.
CHEMTEMPt is a registered trademark of the Ranier Rubber Company.
Sound Data
DD
05985
Measurements, inches (mm)
Gun
AA
Part No.
BB
CC
DD*
238–402 7.5 (191) 6.9 (175) 7.5 (191)
–
238–851 7.8 (198) 6.9 (175) 7.5 (191)
–
238–852 –
–
8.3 (210){ 7.7 (196)
238–883 7.5 (191) 6.9 (175) 7.5 (191)
239–001 7.8 (198) 6.9 (175) 7.5 (191)
*
{
24
–
Dimension DD is taken from the end of the tip guard to
the end of the quick-disconnect air line fitting.
On part no. 238–852, Dimension CC is taken from the top
of the gun to the bottom of the quick-disconnect air line
fitting.
308–640
Gun with GG4 spray tip and 238–628 air cap
Fluid
Air
Sound
Sound
Pressure
Pressure
Pressure{ Power}
psi
psi
dB(A)
dB(A)
(MPa, bar) (MPa, bar)
600
(4.1, 41)
30
(2.1, 0.21)
70.6
77.1
4000
(28, 280)
30
(2.1, 0.21)
84.7
89.8
4000
(28, 280)
100
(0.7, 7)
88.2
93.7
Gun with AAR spray tip and 238–701 air cap
Fluid
Air
Sound
Sound
Pressure
Pressure
Pressure{ Power}
psi
psi
dB(A)
dB(A)
(MPa, bar) (MPa, bar)
600
(4.1, 41)
30
(2.1, 0.21)
78.7
85.8
4000
(28, 280)
30
(2.1, 0.21)
85.1
90.3
4000
(28, 280)
100
(0.7, 7)
88.4
94.4
{
}
Sound pressure was measured per Cagi Pneurop, 1969.
Sound power was measured per ISO–3744, 1981.
Accessories
Use Only Genuine Graco Parts and Accessories
Grounding Clamp and Wire 222–011
12 ga, 25 ft (7.6 m) wire
Air Whip Hoses
100 psi (0.7 MPa, 7 bar) Maximum Working Pressure
To ease movement of the gun and hose. 1/4–18 npsm,
polyurethane with SST braid
238–759
236–873
Brush 101–892
For cleaning the gun.
Conversion Kits
High Pressure Ball Valves, Viton Seals
5000 psi (35 MPa, 350 bar) Maximum Working Pressure
Can be used as fluid drain valve.
210–657
210–658
210–659
3 ft. (0.92 m) hose
6 ft. (1.83 m) hose
1/2 npt(m)
3/8 npt(m)
3/8 x 1/4 npt(m)
Kits to convert from a gun with standard spray tip, tip
guard, and air cap to a gun with the AA RAC assembly. See parts list and drawing below for parts included
with kit.
239–174
In-line Fluid Filter 210–500
5000 psi (35 MPa, 350 bar) Maximum Working Pressure
100 mesh. Fits onto the gun’s fluid connector. 1/4–18
npsm. Includes the parts shown below.
168–517
210–501
Filter
164–075
239–175
Ref.
No.
1
2
3
205–264
Ruby-ball Needle Assembly 236–678
Use to decrease wear with acid catalyzed finishes. For
use in place of the standard fluid needle, part no.
238–754, item 101 on page 17. Use with diffuser-seat
238–427 only.
3a
3b
4
5
Use with gun part no. 238–402 and
238–852 to convert to gun part no.
238–851.
Use with gun part no. 238–883 to convert
to gun part no. 239–001.
Part No.
3/4 npt(m x f) inlet & outlet
1/2 npt(m x f) inlet & outlet
Qty.
238–701
AA RAC AIR CAP ASSEMBLY
192–096
RAC HOUSING
AAR–XXX TIP CYLINDER; tip of choice
Includes items 3a–3b
181–603
SEAT, fluid
113–910
GASKET
239–172
DIFFUSER-SEAT; Included with Kit
239–174 only
239–173
DIFFUSER-SEAT, hi-flow; Included
with Kit 239–175 only
187–521
GASKET, fluid; acetal homopolymer
(black)
Bleed-type Master Air Valve
300 psi (2.1 MPa, 21 bar) Maximum Working Pressure
Relieves air trapped in the air line between the pump
air inlet and this valve when closed.
107–141
107–142
Description
3b
4
1
1
1
1
1
1
1
1
5
3a
2
1
Air Line Quick-disconnect 113–367
Consists of:
113–410
113–368
Coupling, female, quick-disconnect
Coupling, male, quick-disconnect
3
Fluid Swivel Connector 189–018
5800 psi (40 MPa, 400 bar) Maximum Working Pressure
To ease movement of the gun and fluid hose. 1/4–18
npsm
06765A
308–640
25
Notes
26
308–640
Notes
308–640
27
Graco Warranty and Limitation of Liability
WARRANTY
Graco warrants all equipment listed in this manual which is manufactured by Graco and bearing its name to be free from defects
in material and workmanship on the date of sale by an authorized Graco distributor to the original purchaser for use. Graco will,
for a period of twelve months from the date of sale, repair or replace any part of the equipment determined by Graco to be defective. This warranty applies only when the equipment is installed, operated and maintained in accordance with Graco’s written recommendations.
This warranty does not cover, and Graco shall not be liable for general wear and tear, or any malfunction, damage or wear
caused by faulty installation, misapplication, abrasion, corrosion, inadequate or improper maintenance, negligence, accident,
tampering, or substitution of non-Graco component parts. Nor shall Graco be liable for malfunction, damage or wear caused by
the incompatibility of Graco equipment with structures, accessories, equipment or materials not supplied by Graco, or the improper design, manufacture, installation, operation or maintenance of structures, accessories, equipment or materials not supplied by Graco.
This warranty is conditioned upon the prepaid return of the equipment claimed to be defective to an authorized Graco distributor
for verification of the claimed defect. If the claimed defect is verified, Graco will repair or replace free of charge any defective
parts. The equipment will be returned to the original purchaser transportation prepaid. If inspection of the equipment does not
disclose any defect in material or workmanship, repairs will be made at a reasonable charge, which charges may include the
costs of parts, labor, and transportation.
THIS WARRANTY IS EXCLUSIVE, AND IS IN LIEU OF ANY OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING
BUT NOT LIMITED TO WARRANTY OF MERCHANTABILITY OR WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE.
Graco’s sole obligation and buyer’s sole remedy for any breach of warranty shall be as set forth above. The buyer agrees that no
other remedy (including, but not limited to, incidental or consequential damages for lost profits, lost sales, injury to person or property, or any other incidental or consequential loss) shall be available. Any action for breach of warranty must be brought within two
(2) years of the date of sale.
GRACO MAKES NO WARRANTY, AND DISCLAIMS ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE IN CONNECTION WITH ACCESSORIES, EQUIPMENT, MATERIALS, OR COMPONENTS
SOLD BUT NOT MANUFACTURED BY GRACO. These items sold, but not manufactured by Graco (such as electric motors,
switches, hose, etc.) are subject to the warranty, if any, of their manufacturer. Graco will provide purchaser with reasonable assistance in making any claim for breach of these warranties.
For Sales to Canadian Customers:
Except as expressly stated herein, Graco makes no representations, warranties or conditions, express, implied or collateral, concerning any goods or services sold, and GRACO SHALL NOT BE LIABLE IN ANY MANNER FOR any other representation,
warranty or condition of any kind, whether arising by operation of law or otherwise, including but not limited to, WARRANTIES OF
MERCHANTABLE QUALITY OR FITNESS FOR A PARTICULAR PURPOSE.
LIMITATION OF LIABILITY
In no event will Graco be liable for indirect, incidental, special or consequential damages resulting from Graco supplying equipment hereunder, or for the furnishing, performance, or use of any products or other goods sold hereto, whether due to a breach of
contract, breach of warranty, the negligence of Graco, or otherwise.
Graco Phone
Number
Manual
Change Summary
TO PLACE AN ORDER, contact your Graco distributor, or call this number to identify the distributor closest
to you: 1–800–367–4023 Toll Free
Manual changed per ECO V3935–02.
All written and visual data contained in this document reflects the latest product information available at the time of publication.
Graco reserves the right to make changes at any time without notice.
Sales Offices: Atlanta, Chicago, Detroit, Los Angeles
Foreign Offices: Belgium, Canada, England, Korea, Switzerland, France, Germany, Hong Kong, Japan
GRACO INC.
28
308–640
P.O. BOX 1441 MINNEAPOLIS, MN
55440–1441
PRINTED IN U.S.A. 308–640 April 1996, Revised November 1996

* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project