NOTE: A manifold is required for each gun to be installed. Refer to the Parts section for manifold
information.
Orifice Size
Application
General Metal0.020 (0.5)24B33324B33424B335
General Metal0.030 (0.8)24A74724A75424A761
General Metal0.042 (1.1)24A74824A75524A762
in. (mm)ConventionalHVLPCompliant
General Metal0.055 (1.4)24A74924A75624A763
General Metal0.070 (1.8)24A75024A75724A764
General Metal with Fluid Control Knob0.030 (0.8)24A75124A75824A765
General Metal with Fluid Control Knob0.042 (1.1)24A75224A75924A766
General Metal with Fluid Control Knob0.055 (1.4)24A75324A76024A767
High Wear0.059 (1.5)24A77424A77624A778
High Wear0.070 (1.8)24A77524A77724A779
High Wear0.086 (2.2)24B336
High Wear0.110 (2.8)24C316
The following warnings are for the setup, use, grounding, maintenance, and repair of this equipment. 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 power or light switches on or off when
flammable fumes are present.
•Ground all equipment in the work area.
•Use only grounded hoses.
•Hold gun firmly to side of grounded pail when triggering into pail.
•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.
•Do not leave the work area while equipment is energized or under pressure. Turn
off all equipment and follow the Pressure Relief Procedure in this manual when
equipment is not in use.
•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.
313516G3
Page 4
Warnings
WARNING
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.
•Follow Pressure 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 immediately.
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 applicable 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
4313516G
Page 5
Selection Charts
TERMS
Selection Charts
Light Fluid: Up to 18 seconds with No. 2 Zahn
cup (20 centipoise)
Heavy Fluid: Greater than 28 seconds with
No. 2 Zahn cup (greater than 64 centipoise) --
2.8 Volatile Organic Compounds, High-solid
Medium Fluid:19 to 28 seconds with No. 2
Zahn cup (20-64 centipoise)
An HVLP gun is a high transfer efficiency gun
that 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. See the Air Cap
chart, page 7, for maximum inlet pressures.
6313516G
Compliant Guns
A compliant gun is a high transfer efficiency
gun that has been tested to have a transfer
efficiency greater than or equal to HVLP guns.
In addition, the compliant air cap consumes
much less air than the HVLP air cap. Graco
compliant guns have no restrictions on air cap
pressures. See the Air Cap chart, page 7, for
maximum inlet pressures.
Page 7
Conventional Guns
An airspray gun has excellent atomization and
high production rates typically with some
reduction in transfer efficiency.
Proper Needle/Nozzle Selection
Selection Charts
The spray gun's needle/nozzle kits range in
size to provide different fluid flow rates. As a
•For low flow rates or light viscosity fluid,
select the smaller nozzle sizes.
general guideline, use the fluid nozzle that will
give the required flow with the needle fully triggered at a fluid pressure of 5–20 psi
(0.035–0.14 MPa, 0.35–1.4 bar).
•For high flow rates or high viscosity fluid,
select the larger nozzle sizes.
•For abrasive fluids, the high wear gun models are recommended.
Air Caps
Atomizing Air
Air Cap
Part
No.TypeApplication
289773 Conventional General Metal
289784 Conventional General Metal0.070 (1.8)N/AN/A
See the chart to determine air consumption. Add the air consumption values shown for the atomizing air and fan air pressures to get the total air consumption. For example, air cap 24B544 with
20 psi atomizing air pressure uses 3 scfm atomizing air. A 30 psi fan inlet pressure adds 5 scfm
fan air for a total of 8 scfm air consumption.
The Automatic AirPro spray gun can spray
most coatings or finishes currently being used
for automotive, industrial, aerospace, marine,
wood, plastic and architectural applications,
while easily operating from paint delivery systems, such as pressure pots or remote pumps
for production line operation.
The air regulator must have a minimum air flow
capacity of 30 scfm at 100 psi (0.7 MPa, 7.0
bar) air pressure.
Ventilate Spray Booth
•Check and follow all national, state, and
local codes regarding air exhaust velocity
requirements.
4. Install the gun on the manifold, using the
four screws (13). Start the threads of all
four screws. Tighten the front two screws
first, and then tighten the back two. Torque
all four screws evenly to 65 in-lb (7.3 N•m).
Non-circulating System
1. See FIG. 1. Apply anti-seize lubricant to the
threads and mating faces of the manifold
(101), plug (109), and elbow (107), supplied unassembled.
2. Install an elbow (107) in one fluid port of
the manifold (101), and a plug (109) in the
other port.
3. Install the internal plug (19) in the gun fluid
port on the same side as the manifold plug.
4. Connect the fluid supply line to the fluid
inlet elbow (107).
•Check and follow all local safety and fire
codes.
Configure Gun and Manifold
The gun is supplied with an internal fluid plug
and seals (19, 20, 21). To use the gun in a circulating system, remove the internal plug. In a
non-circulating system, leave the plug in place
to minimize flush time.
Circulating System
1. Apply anti-seize lubricant to the threads
and mating faces of the manifold (101) and
the elbows (107), supplied unassembled.
2. Install the elbows (107) in both fluid ports of
the manifold (101).
3. Connect the fluid supply line to one elbow
and the fluid return line to the other. The
manifold fluid ports are reversible.
5. Install the gun on the manifold, using the
four screws supplied. Start the threads of
all four screws. Tighten the front two
screws first, and then tighten the back two.
Torque all four screws evenly to 65 in-lb
(7.3 N•m).
1
Remove when used in circulating systems.
2
Replace with elbow (107) when used in
circulating systems.
1. Install the supplied 1/4 in. tube fitting into
the cylinder (CYL) air port.
2. Install 3/8 in. tube fittings into the atomization (ATOM) air port and the fan (FAN) air
port.
CYL
ATOM
FAN
ti8211a
FIG. 2: Air Fittings
Ground Air Compressors and
Hydraulic Power Supplies
Ground the air compressors and hydraulic
power supplies according to the manufacturer
recommendations.
Ground Spray Gun
Ground the spray gun by mounting the manifold to a properly grounded reciprocator, robot,
or stationary mount. Check the electrical resistance between the manifold and a true earth
ground. The resistance must be less than 1
megohm.
Ground Fluid Supply Container
Ground the fluid supply container according to
local code.
Ground Object Being Sprayed
Ground the object that is being sprayed
according to local code.
Ground System
The following grounding instructions are minimum requirements for a system. Your system
may include other equipment or objects that
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.
Ground Pump/Fluid Supply
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.
Ground Solvent Pails
Ground all solvent pails that are used when
flushing 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.
313516G11
Page 12
Installation
Mount Gun
Reciprocating Arm Rod Mount
To mount the gun on a reciprocating arm rod
[0.5 in. (13 mm) diameter maximum]:
1. Insert the mounting bar (A) through the
hole in the manifold as shown in FIG. 3.
NOTE: Use the 1/8 in. alignment pin (P) to
assist in orienting the gun.
2. Secure the gun to the bar by tightening the
mounting screw (B).
B
P
Stationary Support
To mount the gun on a stationary support
(refer to FIG. 4 and to the correct mounting
hole layout for your manifold, pages 38-42):
1. Align the manifold with the alignment pins.
Locate alignment pins and holes per the
mounting hole layout.
2. Secure the gun to the support with two M5
x 0.8 capscrews (C). The screws must be
long enough to engage the threaded holes
in the gun manifold to a depth of 1/4 in.
(6 mm).
A
FIG. 3: Reciprocating Arm Mount
C
ti13588a
ti13587a
FIG. 4: Stationary Support Mount
12313516G
Page 13
Retrofit Adapter Plate
The retrofit adapter plate enables the manifold
to be attached to a variety of bolt patterns.
To mount the gun using the retrofit adapter
plate (Kit 288197; See Accessories,
page 34):
1. Mount adapter plate to manifold using the
three screws provided with the kit. (See
FIG. 5 and the mounting hole layout on
page 42.)
2. Bolt plate to mounting surface using four
M5 x 0.8 capscrews. Refer to the correct
mounting hole layout for your manifold,
pages 38-41.
Installation
FIG. 5: Retrofit Adapter Plate Mount
ti13589a
313516G13
Page 14
Setup
Setup
Connect Air Line
NOTE:
•You must install an air pressure regulator (F) on each gun air line to control air
pressure to the gun. See FIG. 6.
•If your regulated air source does not
have a filter, install an air filter (G) on
each air line to ensure a dry, clean air
supply to the gun. Dirt and moisture can
ruin the appearance of your finished
workpiece. See FIG. 6.
•Install a bleed type air shutoff valve (E)
on each gun air supply line, downstream of the gun air regulator, to shut
off air to the gun.
1. For manifolds with a separate ATOM and
FAN port, the gun cylinder, fan, and atomization air must be supplied and regulated
separately. For the manual fan valve manifold, only one supply line is required for
both atomization and fan air.
NOTE: The gun atomizing and fan air inlets
are 3/8 in. O.D. tubing. The cylinder air inlet
accepts 1/4 in. (6.3 mm) O.D. tubing. Use 3/8
in. (9.5 mm) O.D. tubing for fan and atomization air to minimize excessive pressure drop in
the hoses.
Connect Fluid Hose
NOTE:
•Before connecting the fluid line, blow it
out with air and flush it with solvent. Use
solvent that is compatible with the fluid
to be sprayed.
•Install a fluid regulator (L) on the fluid
line to control fluid pressure to the gun.
•Install a fluid shutoff valve (M) to shut off
the fluid supply to the gun.
•Filter the fluid line of coarse particles
and sediment to avoid clogging the fluid
nozzle and causing finishing defects.
Inline fluid filter 24B707 is available.
See Accessories, page 34.
1. Connect the fluid supply hose (J) to the gun
fluid inlet (S), 1/4 npsm thread. See FIG. 8.
2. Connect the other end of the fluid hose (J)
to a regulated fluid supply outlet (M).
3. In a circulating system, connect a
grounded fluid return hose to the gun fluid
outlet (T). See FIG. 8.
In a non-circulating system, remove the
gun fluid outlet fitting (T) and plug the outlet
port with the pipe plug supplied. See FIG. 8.
2. Connect each air hose (D) to a regulated
air supply line (H).
K
L
M
H
J
G
FIG. 6: Connect Air Line
14313516G
FED
ti01990
ti7016a
FIG. 7: Connect Fluid Hose.
Page 15
Setup
KEY
N Cylinder Air Inlet: accepts 1/4 in. (6.3 mm) O.D. tubing
P Atomization Air Inlet: 3/8 in, (9.5 mm) O.D. tubing
R Fan Air Inlet: 3/8 in. (9.5 mm) O.D. tubing
S Fluid Inlet: 1/4 npsm
T Fluid Outlet (circulating gun only): 1/4 npsm
Side Mounted Manifold Ports
N
S (or T)T (or S)
FAN
ATOM
CYL
ti8096a
R
P
Bottom Mounted Manifold Ports
Flush Spray Gun
Before running any paint through the spray
gun:
1. Flush the gun with a solvent that is compatible with the fluid to be sprayed, using the
lowest possible fluid pressure and a
grounded metal container.
2. Perform Pressure Relief Procedure; see
page 18.
Position Air Cap
Air caps are factory-set with the alignment pin
(A) set to a vertical spray pattern. To change
the air cap to a horizontal spray pattern, use a
1/6 in. hex wrench to unscrew the alignment
pin (A) and relocate it to the horizontal spray
pattern hole. When relocating the pin use low
strength thread locker. Torque to 1.5-2.5 in-lb
(0.2-0.3 N•m). Do not overtighten. Refer to
FIG. 9.
N
ti8171a
Vertical Pattern
R
T (or S)
FAN
CYL
ATOM
P
A
S (or T)
Horizontal Pattern
ti8097a
FIG. 8: Manifold Ports
FIG. 9: Position Air Cap
313516G15
ti8172a
ti8170a
Page 16
Setup
Adjust Spray Pattern
Do not exceed 100 psi (0.7 MPa, 7 bar)
maximum fluid and air pressure. Higher
pressures can cause parts to rupture and
result in serious injury.
Use the fluid pressure regulator to adjust the
spray gun fluid flow. Some models are
equipped with a fluid control knob to make precise fluid flow adjustments.
NOTICE
Use caution when operating the fluid control knob near the closed position. The
plastic needle tip may be damaged if
forced too hard against the nozzle seat by
the fluid control knob.
Follow these steps to establish the correct fluid
flow and air flow:
1. To achieve desired flow, adjust the fluid flow
using the fluid pressure regulator (L)
installed in the gun fluid line. Typical industrial flow rates will vary with regulator pressures from 5 to 30 psi (34 to 210 kPa, 0.3 to
2.1 bar). If the fluid pressure is too low at
the desired flow rate, install a smaller nozzle. If the fluid pressure is too high, install a
larger nozzle.
For spray guns equipped with the fluid control knob, you can make flow rate changes
at the spray gun. Rotate the fluid control
knob clockwise to reduce the flow.
L
ti7019a
FIG. 10: Fluid Pressure Regulator
NOTE: A larger fluid nozzle at a reduced fluid
pressure will maintain the same flow rate, but
the fluid stream (velocity) will slow down.
When air is applied, the lower velocity allows
the air to act on the fluid longer, which
improves atomization.
2. Using the air pressure regulator (F), set the
fan and atomizing air supply pressure per
Table 1. Use these suggested settings as a
starting point.
Table 1: Suggested Starting Settings
Atomization
Spray GunFan Air (psi)
Conventional3535
HVLP2525
Compliant2525
Air (psi)
16313516G
Page 17
Setup
NOTE: HVLP and Compliant Gun Limits
HVLP Guns: local laws may limit the maximum
pressure to 10 psi (70 kPa, 0.7 bar) at the air
cap for compliance. See the table on page 7
for maximum HVLP/Compliant manifold inlet
pressures. To measure pressure at the air cap,
use the appropriate HVLP Pressure Verification Kit. See Accessories, page 34.
Compliant Guns: See the table on page 7 for
maximum HVLP/Compliant manifold inlet pressures.
4. If the spray pattern is too wide or split,
reduce the fan air pressure (or slightly
close the fan adjustment valve on manifold
288223).
To further control the spray pattern of air-spray guns only, use an alternate air cap.
For a list of available air caps, refer to
Accessories, page 34.
NOTE: Reducing the fan air pressure to 0 psi
(or fully closing the fan adjustment valve) will
produce a round pattern.
F
ti01997
FIG. 11: Air Pressure Regulator
3. Test the spray pattern atomization while
keeping the gun a consistent distance,
about 6 to 8 inches (150 to 200 mm), from
the test piece.
Check the atomization quality. Increase the
gun atomizing air supply pressure with the
air pressure regulator in 5 psi (34 kPa, 0.3
bar) increments until you obtain the desired
atomization.
NOTE: For the best transfer efficiency, use the
lowest setting needed to achieve desired finish
quality.
313516G17
Page 18
Operation
Operation
Pressure Relief Procedure
1. Turn off all bleed type air valves and all
other air and fluid supplies to the gun.
2. Trigger the gun into a grounded metal
waste container to relieve air and fluid pressure.
To achieve best results when applying fluid:
•Keep gun perpendicular and 6 to 8 in.
(150 to 200 mm) from object being
sprayed.
•Use smooth, parallel strokes across surface to be sprayed with 50% overlap.
Incorrect
ti8174a
FIG. 12: Pressure Relief
Apply Fluid
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 actuation air is stopped, the fluid stops
before the air flow stops. This helps ensure
that the spray is atomized and prevents fluid
buildup on the air cap and tip.
Adjust the system control device, if it is automatic, so the gun starts spraying just before
meeting the part and stops as soon as the part
has passed.
ti8098a
Correct
ti8099a
FIG. 13: Correct Spray Method
18313516G
Page 19
Daily Gun Care
NOTICE
Methylene chloride with formic or propionic acid is not recommended as a flushing or cleaning solvent with this gun as it
will damage aluminum and nylon components.
NOTICE
Solvent left in gun air passages could result in a poor quality paint finish. Do not
use any cleaning method which may allow solvent into the gun air passages.
Do not wipe the gun with a cloth soaked
Do not point the gun up while cleaning it.
in solvent; wring out the excess.
Operation
ti8100a
ti4827a
Do not use metal tools to clean the air
cap holes as this may scratch them;
Do not immerse the gun in solvent.
ti8101a
313516G19
scratches can distort the spray pattern.
ti8175a
Page 20
Operation
General System Maintenance
•Perform Pressure Relief Procedure,
page 18.
•Clean the fluid and air line filters daily.
•Check for any fluid leakage from the gun
and fluid hoses. Tighten fittings or replace
equipment as needed.
•Flush the gun before changing colors and
whenever you are done operating the gun.
Clean and Flush Gun
1. Perform Pressure Relief Procedure,
page 18.
2. Shut off the gun fan and atomizing air.
3. Supply a compatible solvent to the gun fluid
inlet.
4. Point the gun down into a grounded metal
container, and flush the gun with solvent
until all traces of paint are removed from
the gun passages.
9. 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.
ti4845a
FIG. 14: Use solvent-dipped soft-bristle brush
10.With the gun pointed down, clean the front
of the gun, using the soft-bristle brush and
solvent.
11.Scrub the air cap retaining ring, air cap,
and fluid nozzle with the soft-bristle brush
(see FIG. 15). 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.
5. Perform Pressure Relief Procedure,
page 18.
6. Disconnect the solvent supply.
7. Remove the air cap retaining ring and air
cap. Remove the nozzle, if necessary.
NOTICE
Trigger the gun or remove the piston cap if
you remove the nozzle for cleaning. This
F
IG. 15: Clean air cap, ring and fluid nozzle
ti8176a
keeps the needle seat away from the nozzle seating surface and prevents the seat
12.Install the air cap retaining ring and air cap.
from being damaged.
13.Dampen a soft cloth with solvent and wring
8. Clean the air cap retaining ring, air cap,
and fluid nozzle with solvent.
20313516G
out the excess. Point the gun down and
wipe off the outside of the gun.
Page 21
Troubleshooting
NOTE: Check all possible remedies in the trou-
bleshooting charts before disassembling the
gun.
General Troubleshooting
ProblemCauseSolution
Troubleshooting
Some improper patterns are caused by the
improper balance between air and fluid. Refer
to Spray Pattern Troubleshooting, page 22.
Fluid leakage through venting
holes.
Air leakage through venting hole.Worn o-ring (9) or gasket (15).Check and replace parts as
Air leakage from back of gun.Worn o-rings (8, 9).Replace o-rings.
Air does not trigger.Piston stem is disconnected from
Air does not shut off. Piston assembly not seating
Fluid leakage from front of gun.Fluid needle tip (5a) is dirty, worn,
Worn packing (17) or needle (5).Replace packing or needle.
needed.
Replace piston assembly.
main body of piston assembly (3).
Cylinder air pressure is too low.
properly.
Broken return spring (7).
Swollen o-ring (8).
Worn piston stem o-rings (10, 11).
Bottom gasket (12) failed.
or damaged.
Increase cylinder air pressure to
50 psi.
Clean/service piston assembly.
Replace worn or swollen o-rings.
Replace return spring.
Replace o-rings.
Replace o-rings.
Replace gasket.
Clean or replace fluid needle tip or
entire needle (5).
Dirty or worn nozzle (23).
Fluid is present at air cap holes.Nozzle (23) is insufficiently tight-
ened or sealing o-ring (36) is damaged.
313516G21
Clean or replace nozzle.
Tighten or replace o-ring.
Page 22
Troubleshooting
ProblemCauseSolution
Fluid needle will not trigger.Loose or missing fluid needle stop
(29) or setscrew (30).
Air leaking around piston (3).
Swollen piston o-ring (8).
Insufficient air pressure on trigger.
Plug (19) is in incorrect fluid port.
Fluid does not shut off.Worn o-ring (11) or (9).
Piston cap (4) not fully tightened.
Spring (6) not in place.
Replace stop or tighten setscrew.
Replace o-ring (8) or piston.
Replace o-ring. Do not immerse
piston in solvent.
Increase air pressure or clean air
line.
Move plug to fluid port consistent
with manifold plumbing, unless
you are using gun in a circulating
system. If you are, all fluid ports in
gun and on manifold should be
open.
Replace o-ring.
Tighten piston cap until it bottoms
out.
Check spring position.
Swollen piston o-ring (8).
Spray Pattern Troubleshooting
ProblemCauseSolution
Fluid flow is fluttering while spraying.
Fluid flow fades while spraying
high viscosity fluids.
Pattern becomes off-set or heavy
on ends.
Gun fluid pressure is too high with
gun triggered.
Fluid system will not operate at
low enough fluid pressure [below
10 psi (70 kPa, 0.7 bar)].
Fluid nozzle is not tight enough.
O-ring (36) is missing or damaged.
Fluid filter is clogged.
Fluid pressure is too low, causing
fluid flow to reduce when gun is
elevated.
Air cap horn holes plugged or
damaged.
Using needle/nozzle kit with too
small orifice.
There is no fluid regulator, or air
regulator on pressure pot is not
sensitive enough at low pressures.
Replace o-ring. Do not immerse
piston in solvent.
Tighten fluid nozzle to 60 in-lb
(6.8 N•m).
Replace o-ring.
Check fluid filter.
Raise fluid pressure at source or
use a smaller fluid nozzle.
Clean air cap horn holes with
non-metallic item such as a toothpick, or replace air cap.
Use needle/nozzle kit with larger
orifice.
Add low pressure fluid regulator,
or add more sensitive low pressure air regulator on pressure pot.
22313516G
Page 23
Service
Service
7. Check the fluid needle (5) for damage or
excessive wear. Replace the needle tip (5a)
or the entire needle if necessary.
NOTE: Air Section Repair Kit 288171 and
Fluid Section Repair Kit 24B675 are available
for purchase separately. Numbers in parenthesis in the text refer to the reference numbers in
the figures and in the parts list.
Disassembly
1. Perform Pressure Relief Procedure,
page 18.
2. Unscrew the four screws (13) and remove
the gun from the manifold.
3. Remove the air cap retainer (25) and air
cap (24).
4
13
23
8. Remove nozzle (23). Check nozzle and
o-ring (36) for damage.
36
ti8198a
FIG. 17
9. Remove the piston. Using a pliers, pull the
piston (3) out of the piston housing (1).
10.Unscrew the two screws (14) and separate
the fluid housing (2) and the piston housing
(1). Remove gasket (12) only if it needs to
be replaced.
24, 25
6
7
29
14
ti13590a
FIG. 16
2
30
3
4. Remove the piston cap (4) from the piston
housing (1). Remove the springs (6, 7).
5. Using a 1/16 in. hex wrench loosen the fluid
F
IG. 18
1
ti13591a
needle set screw (30). Remove the needle
stop (29).
11.Remove the packing nut (16) with a
6. Pull the fluid needle (5) out of the back of
wrench.
the gun.
12.Remove the fluid packing (17) from the nut
(16). Discard the old fluid packing.
313516G23
Page 24
Service
13.Remove all o-rings from the piston (3) and
stems (T). Check that the stems are solidly
in place. If they are loose, replace the entire
piston assembly (3).
14.Perform the following applicable step:
a. Non-circulating guns: Remove the fluid
outlet port plug (19), and gasket (22)
from the fluid housing (2). Remove the
Cutaway View:
Part No. 24A749 Gun Shown
252
23
1
24
2
2
16
1
10*
2
8
3
o-ring (21) and backup (20) from the
plug. See FIG. 21.
b. Circulating guns: Remove the gasket
(22) from the fluid housing (2). See FIG.
21.
15.Clean all parts and replace any worn parts.
When assembling, lubricate the threads
with anti-seize lubricant.
T
11*
8*
3
4
4
3
2
6
7
5a
9
ti8199a
5
Alternate Fluid Control Shown
36
46
45 (x 2)
1
2
3
4
6
8
30
6 7
9
10
3
3
SERVICE NOTES:
Torque to 35-45 in-lb (4.0-5.1 N•m).
Lubricate threads with anti-seize lubricant.
Lubricate with light-weight oil.
Tighten cap (4) until it bottoms out.
Apply semi-permanent anaerobic sealant.
7
Torque to 6.5-7.5 in-lb (0.73-0.85 N•m).
Torque to 95-105 in-lb (10.7-11.8 N•m).
Apply semi-permanent anaerobic sealant to two
9
threads at end of needle shaft.
12*
3
3
3
29
ti13592b
10
Step in spacer (46) must face into packing nut.
FIG. 19
24313516G
Page 25
Service
Reassembly
1. Non-circulating guns only: Lubricate the
backup ring (20†) and o-ring (21†) and
install them on the fluid outlet port plug
(19). Install the plug in the fluid outlet port
of the fluid housing (2). See FIG. 21.
2. All guns: Reinstall the gasket (22) in the
fluid housing (2).
3. Install the o-rings (8*, 9*) on the piston (3).
Install the two o-rings (10*, 11*) on each of
the piston stems (T). Lubricate all the
o-rings, the piston, and the piston stems.
4. Remove the protective paper from the
sticky side of the gasket (12*) and adhere
the gasket to the bottom of the piston housing (1), making sure the three holes in the
gasket are properly aligned with the matching holes in the housing.
5. Lubricate the washers (45†) and spacer
(46†). Insert them into the packing nut (16)
as shown in FIG. 20, The step on the
spacer faces into the packing nut.
Torque the two screws (14) to 35-45 in-lb
(4.0-5.1 N•m).
a. Insert the piston (3) into the piston
housing (1).
b. Ensure nozzle sealing o-ring (36) is
installed on nozzle (23).
8. To avoid galling of the fluid nozzle seat in
the fluid housing, apply a thin film of lubricant to the threads. Install the nozzle into
the fluid housing. Torque the nozzle
securely to 35-45 in-lb (4.0-5.1 N•m).
NOTE: If you are replacing the needle tip (5a),
apply semi-permanent anaerobic sealant to
two threads at the end of the needle shaft.
Assemble the needle tip to the shaft and hand
tighten. Allow adequate time for the sealant to
cure before installing the needle assembly into
the gun.
9. Lubricate and install the needle (5) into the
back of the gun assembly. Push it straight
in through the piston.
16
46
45
45
ti17603a
FIG. 20. Fluid packings
6. Insert the packing nut into the fluid housing
(2) and torque to 95-105 in-lb (10.7-11.8
N•m).
7. Align the gasket (15*) as shown in the
exploded view in FIG. 21. Place the gasket
on the piston housing (1), then install the
fluid housing (2) onto the piston housing.
10.Install the needle stop (29) on the needle.
Coat the setscrew (30) with semi-permanent anaerobic sealant and install the
screw into the needle stop. Torque to
6.5-7.5 in-lb (0.73-0.85 N•m). Pull on the
needle to make sure it seats fully.
11.Install the springs (6, 7).
12.Lubricate the threads of the piston housing
(1). Screw the cap (4) onto the housing
until it bottoms out.
13.Install the air cap (24) and air cap retainer
(25).
14.Reinstall the gun on the manifold using the
four screws (13). Start the threads of all
four screws. Tighten the front two screws
first, and then tighten the back two. Torque
all four screws evenly to 65 in-lb (7.3 N•m).
313516G25
Page 26
Parts
.Parts
Parts
Part No. 24A749 Gun Shown
23
1
24
25
24a
25a
2
5a
9
10*
36†
11*
3
11
13
2
2
3
45
16
8
5
21†
10
3
15*
46
12
3
Alternate Fluid
Control
10
19
20†
10
3
4
4
39
22†
T
3
6
9*
12*
11
1
SERVICE NOTES:
Torque to 35-45 in-lb (4.0-5.1 N•m).
1
Lubricate threads with anti-seize lubricant.
2
3
Lubricate with light-weight oil.
4
Tighten cap (4) until it bottoms out.
6
Apply semi-permanent anaerobic sealant.
Torque to 6.5-7.5 in-lb (0.73-0.85 N•m).
7
Torque to 95-105 in-lb (10.7-11.8 N•m).
8
Apply semi-permanent anaerobic sealant to two threads at end of needle shaft.
9
10
Used on non-circulating guns only.
Torque to 65 in-lb (7.3 N•m).
Graco warrants all equipment referenced in this document which is manufactured by Graco and bearing its name to be free from defects in
material and workmanship on the date of sale to the original purchaser for use. With the exception of any special, extended, or limited warranty
published by Graco, 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.
In no event will Graco be liable for indirect, incidental, special or consequential damages resulting from Graco supplying equipment hereunder, or
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.
FOR GRACO CANADA CUSTOMERS
The Parties acknowledge that they have required that the present document, as well as all documents, notices and legal proceedings entered into,
given or instituted pursuant hereto or relating directly or indirectly hereto, be drawn up in English. Les parties reconnaissent avoir convenu que la
rédaction du présente document sera en Anglais, ainsi que tous documents, avis et procédures judiciaires exécutés, donnés ou intentés, à la suite
de ou en rapport, directement ou indirectement, avec les procédures concernées.
Graco Information
For the latest information about Graco products, visit www.graco.com.
TO PLACE AN ORDER, contact your Graco distributor or call to identify the nearest distributor.
Phone: 612-623-6921 or Toll Free: 1-800-328-0211 Fax: 612-378-3505
All written and visual data contained in this document reflects the latest product information available at the time of publication.
GRACO INC. AND SUBSIDIARIES • P.O. BOX 1441 • MINNEAPOLIS MN 55440-1441 • USA
Copyright 2009, Graco Inc. All Graco manufacturing locations are registered to ISO 9001.
Graco reserves the right to make changes at any time without notice.
Original instructions. This manual contains English. MM 313516
Graco Headquarters: Minneapolis
International Offices: Belgium, China, Japan, Korea
www.graco.com
Revised 01/2012
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