100 psi (0.7 MPa, 7 bar) Maximum Working Fluid Pressure
100 psi (0.7 MPa, 7 bar) Maximum Working Air Pressure
40 psi (280 kPa, 2.8 bar) Maximum Compliant Inbound Air Pressure
U.S. Patent 6,019,293
Taiwan Patent 199585
Taiwan Patent 199601
INSTRUCTIONS
This manual contains important warnings
and information.
READ AND KEEP FOR REFERENCE.
The spray gun’s needle/nozzle kits range in size to
provide different fluid flow rates.
As a general guideline, use the fluid nozzle that will
give the required flow with the needle fully triggered at
the lowest fluid pressure.
For low flow rates or light viscosity fluid, select the
smaller nozzle sizes.
For high flow rates or high viscosity fluid, select the
larger nozzle sizes.
NOTE:
D To help select the proper needle/nozzle size, a fluid
pressure gauge may be connected temporarily to
the gun fluid inlet to determine the fluid pressure.
See Accessories, page 28.
D See page 17 for troubleshooting information.
Optional HVLP Air Caps
Air Cap Part
No.
196107Shading/SAP6 (152)
† measured with gun nozzle 10 in. (254 mm) from
target surface
Pattern TypePattern
Length†
in. (mm)
308741 5
Air Flow and Atomizing Pressure
NOTE: All tests were completed with the 0.055 in. (1.397 mm) nozzle, large pattern air cap, and the pattern adjust-
ment valve fully open.
Air Flow
35
30
25
20
15
AIR FLOW (scfm)
10
5
0
10203040506070
GUN INLET PRESSURE (psi)
Atomizing Air Pressure
(inlet pressure versus atomizing pressure)
20
18
16
14
12
10
8
6
4
NOMINAL ATOMIZING PRESSURE (psi)
2
0
10203040506070
GUN INLET PRESSURE (psi)
Gun Inlet Pressure
psi (kPa, bar)
10 (70, 0.7)1 (7, 0.1)
20 (140, 1.4)4 (28, 0.2)
30 (210, 2.1)7 (48, 0.4)
40 (280, 2.8)10 (70, 0.7)
50 (345, 3.4)13 (91, 0.9)
60 (410, 4.1)16 (111, 1.1)
70 (480, 4.8)19 (132, 1.3)
Nominal Atomizing Pressure
psi (kPa, bar)
6 308741
Typical Installation
A
B
KEY
A Delta Spray Gun
See page 4 for gun part numbers.
B Fluid Inlet; 3/8 npsm (R3/8–19)
C Air Swivel Inlet; 1/4 npsm (R1/4–19)
D Air Hose
Recommend 5/16” (7.9 mm) ID hose
Optional 3/8” (9.5 mm) ID hose
E Air Shut-off Valve
F Air Regulator
G Air Filter
H Air Supply Line
EFG
H
C
D
07600A
The Delta Spray HVLP spray gun was designed to
produce the highest quality finish with today’s fluids as
well as the Low V.O.C. (volatile organic compound)
fluids of tomorrow.
This 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 any paint delivery
system, including cups, pressure pots, or remote
pumps for production line operation.
The spray gun typically utilizes 40 psi (280 kPa, 2.8
bar) inbound air pressure to produce high quality paint
finishes at 10 psi (70 kPa, 0.7 bar) atomizing air pressure.
The air regulator must have a minimum air flow
capacity of 30 scfm at 100 psi (0.7 MPa, 7 bar) air
pressure. Refer to the Pressure Drop Charts, page
11.
Ventilate the Spray Booth
WARNING
To prevent hazardous concentrations of
toxic and/or flammable vapors, spray
only in a properly ventilated spray booth.
Do not operate the spray gun unless
ventilation fans are operating.
Check and follow all of the National,
State and Local codes regarding air ex-
haust velocity requirements.
Check and follow all local safety and fire codes.
308741 7
Setup
1. Connect the Air Line
NOTE:
D You must install an air pressure regulator (F) on the
gun air line to control air pressure to the gun. See
Fig. 2.
D If your regulated air source does not have a filter,
install an air filter (G) on the 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. 2.
D Use a 5/16 inch (7.9 mm) I.D. air hose to minimize
excessive pressure drop in the hose. See the
Pressure Drop Chart on page 11 for the expected
pressure drops through a 25 ft. (7.625 m) hose.
A. Connect the air hose (D) to the 1/4 npsm gun air
inlet (C).
2. Connect the Fluid Hose
NOTE:
D Before connecting the fluid line, blow it out with air
and flush it with solvent. Use solvent which is
compatible with the fluid to be sprayed.
D Install a fluid regulator (L) on the fluid line to control
fluid pressure to the gun. See Fig. 4.
D Filter the fluid line of coarse particles and sediment
to avoid clogging the fluid nozzle and causing
finishing defects.
A. Connect the fluid hose (J) to the gun fluid inlet (B)
3/8–18 npsm [R 3/8–19] compound thread.
B
C
D
Fig. 1
B. Connect the other end of the air hose (D) to a reg-
ulated air supply line (H).
NOTE: Fig. 2 shows the filter (G) air regulator (F),
and air shut-off valve (E) on the air supply line.
H
FG
7033A
J
7034A
Fig. 3
B. Connect the other end of the fluid hose (J) to a
regulated fluid supply line (K).
NOTE: Fig. 4 shows the fluid regulator (L) and
fluid shut-off valve (M) on the fluid supply line (K).
K
L
M
J
Fig. 2
8 308741
E
D
01990
Fig. 4
7016A
Setup
A
3. Flush the Spray Gun.
Before putting any paint through the spray gun, flush
the gun out with a solvent that is compatible with the
fluid to be sprayed, using the lowest possible fluid
pressure and a grounded metal container.
Fig. 5
WARNING
PRESSURIZED EQUIPMENT HAZARD
To reduce the risk of a serious injury whenever you
are instructed to relieve pressure, follow the Pres-sure Relief Procedure on page 12.
7035A
6. Adjust the Spray Pattern
WARNING
COMPONENT RUPTURE HAZARD
Do not exceed the 100 psi (0.7 MPa,
7 bar) maximum fluid and air pres-
sure of this gun. Higher pressures can cause parts
to rupture and result in serious injury.
Follow these steps to establish the correct fluid flow
and air flow:
A. Turn the fluid adjustment knob (21) counterclock-
wise until no restriction of the trigger movement is
felt, then turn out another half turn. When the knob
is turned far enough, the trigger should be able to
touch the gun handle when the gun is triggered.
WARNING
PRESSURIZED EQUIPMENT HAZARD
To avoid injury, never open the fluid adjustment
knob (21) beyond the one half turn indicated in
Adjust the Spray Pattern.
4. Relieve the Pressure.
5. Position the Air Cap
Rotate the air cap as needed to achieve the desired
spray pattern direction. To create a round pattern, turn
the pattern air off by turning the pattern adjustment
knob (13a) fully clockwise. Refer to Fig. 12, page 11.
Vertical Pattern
Horizontal Pattern
Fig. 6
02020
21
open
7036
Fig. 7
308741 9
Setup
A
A
6. Adjust the Spray Pattern (continued)
B. 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).
L
Fig. 8
C. Hold the gun parallel to the floor and adjust the fluid
pressure to yield a 1 to 6 inch (25.4 to 152.4 mm)
straight fluid stream before the stream falls off.
7019A
NOTE: A larger fluid nozzle at a reduced fluid pressure
will maintain the same flow rate, but slow down the
fluid stream (velocity). When air is applied, this allows
the air to act on the fluid longer and improve the atomization.
D. If further fluid flow restriction is needed at the gun,
turn the fluid adjustment knob (21) clockwise to
reduce the volume of fluid output by limiting the
needle travel.
21
close
7039
Fig. 11
(25.4–152.4 mm)
straight fluid stream
Fig. 9
Fluid Velocity of Fluid Nozzles
at the Same Flow Rate
0.042
(1.067)
0.055
(1.397)
Orifice Size in inches (mm)
0.070
(1.778)
0.086
(2.184)
Fig. 10
1–6 in.
0.110
(2.794)
7037
7038A
WARNING
PRESSURIZED EQUIPMENT HAZARD
To avoid injury, never open the fluid adjustment
knob (21) beyond the one half turn indicated in
Adjust the Spray Pattern, page 9.
CAUTION
Restricting the trigger and fluid needle travel by
continuously spraying with the fluid adjustment knob
closed (turned clockwise), will cause accelerated
abrasive wear on the fluid needle and wear on the
trigger/air valve shaft interface.
For the best results, use the gun fluid regulator to
adjust the fluid flow or use a different size needle/
nozzle/air cap combination.
10 308741
Setup
A
6. Adjust the Spray Pattern (continued)
NOTE:
D If the fluid adjustment knob is turned in all the way
the gun will emit only air.
D For continuous spraying, turn the fluid adjustment
knob (8) counterclockwise until no restriction of the
trigger movement is felt. When the knob is turned
out far enough, the trigger should be able to touch
the gun handle when the gun is triggered. For the
typical fluid adjustment knob setting, turn the knob
out 1/2 turn more. This setting provides maximum
fluid flow and prevents premature wear on the fluid
nozzle.
E. Open the pattern adjustment valve (25) by turning
the knob fully counterclockwise to achieve a full
fan pattern.
25
F
Fig. 13
Pressure Drop Chart
5/16 inch (7.9 mm) I.D. hose
Recommended hose size to minimize excessive
pressure drop. Expected pressure drops measured
using 25 ft. (7.625 m) long hose, with gun triggered.
Air Regulator Pressure
Setting
psi (kPa, bar)
18.5 (128, 1.3)10 (70, 0.7)
Gun Inlet Pressure
psi (kPa, bar)
01997
Close
(narrower
pattern)
Open
(wider
pattern)
Fig. 12
F. Using the air pressure regulator (F), set the air
supply pressure at about 50 psi (345 kPa, 3.4 bar).
See the Pressure Drop Chart for regulator setting
versus gun inlet pressure comparison.
If available, use the fluid manufacturer’s recom-
mendations to set the air line pressure for a high
volume, low pressure, spray gun application.
NOTE: Local laws may limit the maximum pres-
sure to 10 psi (70 kPa, 0.7 bar) at the air cap for
HVLP compliance. The accessory Air Cap Verifica-
tion Kit is available to measure the atomizing pres-
sure at the air cap.
7040
34.0 (238, 2.3)20 (140, 1.4)
48.0 (335, 3.3)30 (210, 2.1)
62.5 (427, 4.3)40 (280, 2.8)
76.5 (525, 5.3)50 (345, 3.4)
90.5 (624, 6.3)60 (410, 4.1)
G. Test the spray pattern and atomization while hold-
ing the gun about 6 to 8 inches (150 to 200 mm)
from the test piece.
H. If the spray pattern is too wide with the pattern
adjustment knob (13a) turned fully counterclockwise, turn the pattern adjustment knob clockwise
until you have the desired pattern size.
NOTE: Turning the pattern adjustment knob fully
clockwise will produce a round pattern.
I.Check the atomization quality again. Increase the
gun air supply pressure with the air pressure regulator in 5 psi (34 kPa, 0.3 bar) increments until you
obtain the desired atomization.
J. If after increasing the gun air supply pressure the
atomization is still unacceptable, try installing a
larger fluid nozzle size to reduce the fluid velocity.
Refer to Fig. 10. Repeat steps 6-E to 6-I until you
obtain the desired atomization.
308741 11
Operation
Pressure Relief Procedure
WARNING
PRESSURIZED EQUIPMENT HAZARD
The system pressure must be manually relieved to
prevent the system from starting or spraying accidentally. To reduce the risk of an injury from accidental spray from the gun, splashing fluid, or
moving parts, follow the Pressure Relief Proce-dure whenever you:
D are instructed to relieve the pressure,
D stop spraying,
D check or service any of the system equipment,
D or install or clean the spray nozzle.
1. Turn off the air and fluid supply to the gun.
2. Trigger the gun into a grounded metal waste
container to relieve air and fluid pressure.
Applying the Fluid
When using the HVLP spray gun, instead of a conventional air spray 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 produced by lower HVLP air pressures, along
with a larger fluid particle size because there is less air
to blow off solvents than what is produced by conventional air spray. Take care to avoid runs or sags as you
spray.
1. To achieve the best results when applying fluid,
keep the gun perpendicular to the surface and
maintain a consistent distance of approximately 6
to 8 inches (150 to 200 mm) from the object being
sprayed. See Fig. 14.
2. To obtain an even finish, use smooth, even strokes
across the object being sprayed with 50% overlap.
Fig. 14
3. Paint using parallel strokes. This spray gun applies
all coatings evenly without cross coating.
WRONGRIGHT
07930
12 308741
Daily Gun Care, Flushing, and Cleaning
WARNING
PRESSURIZED EQUIPMENT HAZARD
To reduce the risk of a serious injury whenever you
are instructed to relieve pressure, follow the Pres-sure Relief Procedure on page 12.
Clean all parts with a non-conductive solvent, compatible with the fluid being sprayed. Conductive
solvents can cause the gun to malfunction.
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.
CAUTION
CAUTION
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 point the gun up while cleaning it.
Do not wipe the gun with a cloth soaked in
solvent; ring out the excess.
07042A
Do not immerse the gun in solvent.
07041A
General System Maintenance
1. Relieve the pressure.
2. Clean the fluid and air line filters daily.
3. Check for any fluid leakage from the gun and fluid
hoses. Tighten fittings or replace equipment as
needed.
02027
Do not use metal tools to clean the air cap
holes as this may scratch them; scratches can
distort the spray pattern.
02055
4. Flush the gun before changing colors and whenever you are done operating the gun.
308741 13
Daily Gun Care, Flushing, and Cleaning
WARNING
PRESSURIZED EQUIPMENT HAZARD
To reduce the risk of a serious injury whenever you
are instructed to relieve pressure, follow the Pres-sure Relief Procedure on page 12.
1. Relieve the pressure.
2. Disconnect the fluid supply hose (J) and air supply
hose (D) from the gun.
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.
J
Fig. 15
3. Connect the solvent supply hose (N) to the gun.
D
7044A
Fig. 17
5. Turn off the solvent supply.
6. Relieve the pressure. Disconnect the solvent
supply.
7. Disconnect the solvent (N) supply hose from the
gun.
7035A
N
Fig. 16
14 308741
7109A
Fig. 18
N
7044A
Daily Gun Care, Flushing, and Cleaning
8. Remove the air cap retaining ring (15) and air cap
(14).
9. Trigger the gun while you remove the fluid nozzle
(12) from the gun with the gun tool (28).
12
28
14, 15
Fig. 19
7045A
CAUTION
Trigger the gun whenever you tighten or remove the
nozzle. This keeps the needle seat away from the
nozzle seating surface and prevents the seat from
being damaged.
10. Clean the air cap retaining ring, air cap, and fluid
nozzle with solvent.
12. With the gun pointed down, clean the front of the
gun, using the soft-bristle brush and solvent.
Fig. 21
13. Scrub the air cap retaining ring, air cap, and fluid
nozzle with the soft-bristle brush. 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.
7046A
11. 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.
Fig. 20
02007
Fig. 22
02011
308741 15
Daily Gun Care, Flushing, and Cleaning
14. Trigger the gun while you install the fluid nozzle
(12) with the gun tool (28). Tighten the nozzle
securely to 125–135 in-lb (14–15 NSm) to obtain a
good seal.
15. Install the air cap retaining ring (15) and air
cap (14).
1
12
28
14, 15
1
Torque to 125–135 in-lb (14–15 NSm)
Fig. 23
17. After cleaning the gun, lubricate the following parts
with lubricant 111265 daily:
DFluid adjustment knob threads
DTrigger pivot pin
DFluid needle shaft
Lubricate
7045A
16. Dampen a soft cloth with solvent and wring-out the
excess. Point the gun down and wipe off the
outside of the gun.
Fig. 24
7047A
Fig. 25
Lubricate
07032A
16 308741
Troubleshooting
WARNING
PRESSURIZED EQUIPMENT HAZARD
To reduce the risk of a serious injury, follow the Pressure Relief Procedure on page 12 before checking
or repairing any part of the gun or system.
PROBLEMCAUSESOLUTION
Fluid flow is fluttering while spraying1. Fluid nozzle not tight enough1. Tighten fluid nozzle to 125–135
in-lb (14–15 NSm).
2. Fluid filter clogged3. Check fluid filter.
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
Using a low fluid pressure setting,
the fluid flow is too high, making it
necessary to restrict needle travel to
reduce fluid flow
4. Fluid adjustment knob not properly set
1. Air hose size is too restricted for
higher air flow being used
2. Fluid pressure 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
Using needle/nozzle kit with too
large orifice
5. Turn the fluid adjustment knob
out for less feathering or use a
larger size nozzle.
1. Use 5/16 in. (7.9 mm) I.D. air
hose if the hose is 25 ft.
(7.625 m) long. If longer hose is
needed, use a 3/8 in. (9.5 mm)
I.D. hose.
3. Raise fluid pressure at source or
use a smaller fluid nozzle.
Clean air cap horn holes with nonmetallic item such as a toothpick, or
replace air cap.
Use needle/nozzle kit with larger
orifice
Use needle/nozzle kit with smaller
orifice
Fluid system will not operate at low
enough fluid pressure [below 10 psi
(70 kPa, 0.7 bar)]
There is no fluid regulator, or air
regulator on pressure pot is not sensitive enough at low pressures
Add low pressure fluid regulator, or
add more sensitive low pressure air
regulator on pressure pot.
308741 17
Service
Items Needed for Service
D Gun Tool – provided
D Packing Installation Tool – provided
D Adjustable Wrench
D Screw Driver
D Lubricant part no. 111265; see Accessories, page
28, to order
D Compatible Solvent
Fluid Packings Replacement
WARNING
12
28
14, 15
PRESSURIZED EQUIPMENT HAZARD
To reduce the risk of a serious injury, follow the
Pressure Relief Procedure on page 12 before
checking or repairing any part of the gun or system.
NOTE:
D Order Fluid Packing Kit 239640. The kit includes
the spreader, u-cup, and spacer.
D Clean parts with a solvent that is compatible with
the parts and the fluid being sprayed.
D Lightly lubricate the parts indicated in Fig. 28 with
lubricant 111265.
1. Relieve the pressure.
2. Remove the air cap retaining ring (15) and air cap
(14). See Fig. 26.
3. Trigger the gun while you remove the fluid nozzle
(12) with the gun tool (28).
CAUTION
Trigger the gun whenever you tighten or remove the
nozzle. This keeps the needle seat away from the
nozzle seating surface and prevents the seat from
being scratched.
Fig. 26
7028A
4. Remove the fluid adjustment knob (21) and fluid
spring (23). See Fig. 28.
5. Pull the fluid needle (13) out the back of the gun.
6. Remove the screw (11), pin (17), and trigger (10).
7. Remove the hex nut (9) with the gun tool (28).
8. Remove the spray housing (2a) and insert (4).
9. Unscrew the packing screw (8) from the insert (4)
with the gun tool (28).
10. Use the back end of the fluid needle (13) to push
the three fluid packings (5) out of the insert (4). Be
careful not to damage the needle or insert. Discard
the old fluid packings.
11. Check the fluid needle (13) for damage or excessive wear. Replace needle tip or entire needle if
necessary.
18 308741
Service
12. Place the new fluid packings (5) and packing
screw (8) onto the needle (13). See Fig. 27 for the
orientation of the parts.
13. Insert the fluid needle (13) into the back of the
insert (4) to install the fluid packings (5).
14. Tighten the packing screw (8) just enough to hold
the packings (5) in the insert (4). The needle (13)
must move freely. Remove the needle.
NOTE: To ensure proper alignment of the parts, follow
the next steps in the order they are given.
15. Slide the insert (4) into the spray housing (2a). See
Fig. 28. Align the housing with the slot and lip (A)
on the gun and slide the insert into the gun
body (1).
16. Tighten the hex nut (9) onto the insert (4) handtight, then loosen the nut about one turn so the
insert (4) and spray housing sit loosely in the gun
body.
17. Lubricate and install the fluid needle (13).
18. Lubricate the fluid adjustment knob threads (21),
and install the fluid spring (23) and adjustment
knob.
19. Install the trigger (10), pin (17), and screw (11).
Torque the screw to 20–30 in-lb (2.3–3.4 NSm).
2
25c
3
25a
6
12
7
*25b
25d
14
15
1
11
1
4
1
13a
26*
16*
13
20. To avoid galling of the fluid nozzle seat in the insert
(4), apply a thin film of lubricant to the seat. Trigger
the gun while you install the fluid nozzle (12) with
the gun tool (28). Torque the nozzle securely to
145–155 in-lb (16–17 NSm).
21. Tighten the hex nut (9) securely to 125–135 in-lb
(14–15 NSm).
4
5
1
2
3
8
13
1
Spreader; tapered end down
2
U-cup; lips face up
3
Spacer
Fig. 27
1
Item 2 includes 2a–2b
Item 13 includes item 13a
Item 25 includes 25a–25d
02024
*2b
Fig. 28
2a
5
2
19
21
3
Lightly lubricate
1
Lightly lubricate threads
2
Torque to 125–135 in-lb (14–15 NSm)
3
Torque to 20–30 in-lb (2.3–3.4 NSm)
4
U-cup lips face air valve assembly (26)
5
U-cup lips face away from nut (19/25a)
6
Torque to 145–155 in-lb (16–17 NSm)
7
*Parts included in Repair Kit 239–639
7584A
4
6
20*
22
23
*5
A
3
9
8
24
17
10
3
1
308741 19
Service
22. To tighten the packing screw (8), turn the screw in
until it touches the fluid packings (5), then tighten
one full turn to pre-set the packings. Loosen the
screw, then turn it in until it touches the packings
again. Tighten the screw 1/12 turn more (equal to
half the distance between points on the hex head).
23. Trigger the gun to test the needle movement. If the
needle does not return after the trigger is released
or is slow in returning, loosen the packing screw
(8) slightly until the needle returns freely.
24. Install the air cap (14) and air cap retaining ring
(15). Hand-tighten the ring.
25. Make sure the gun fluid packings are sealing
properly by spraying solvent at low pressure
before fully pressurizing the gun with the fluid to be
sprayed.
If the fluid packings leak, tighten the packing screw
(8) slightly and retest until the packings and needle
seal completely.
Complete Gun Packing Replacement
1. Relieve the pressure.
2. Remove the air cap retaining ring (15) and air cap
(14). See Fig. 26, page 18.
3. Trigger the gun while you remove the fluid nozzle
(12) with the gun tool (28).
CAUTION
Trigger the gun whenever you tighten or remove the
nozzle. This keeps the needle seat away from the
nozzle seating surface and prevents the seat from
being scratched.
4. Remove the fluid adjustment knob (21) and fluid
spring (23). See Fig. 28, page 19.
5. Pull the fluid needle (13) out the back of the gun.
6. Remove the screw (11), pin (17), and trigger (10).
7. Remove the hex nut (9) with the gun tool (28).
WARNING
PRESSURIZED EQUIPMENT HAZARD
To reduce the risk of a serious injury, follow the
Pressure Relief Procedure on page 12 before
checking or repairing any part of the gun or system.
NOTE:
D Gun Repair Kit 239639 is available. The kit includes
an o-ring (2b), fluid packing kit (5), u-cups (16, 20,
25b), and air valve assembly (26).
D Clean parts with a solvent that is compatible with
the parts and the fluid being sprayed.
D Lightly lubricate the parts indicated in Fig. 28 with
lubricant 111265.
8. Remove the spray housing (2a) and insert (4).
Remove the o-ring (2b) with a pick and install the
new o-ring.
To ease o-ring installation, place the insert (4) into
the spray housing (2a) to plug the end. Install one
end of the o-ring into the groove in the housing,
then press the rest of the o-ring into place.
9. Unscrew the packing screw (8) from the insert (4)
with the gun tool (28).
10. Use the back end of the fluid needle (13) to push
the three fluid packings (5) out of the insert (4). Be
careful not to damage the needle or insert. Discard
the old fluid packings.
20 308741
Service
11. Place the new fluid packings (5) and packing
screw (8) onto the needle (13). See Fig. 27, page
19, for the orientation of the parts.
12. Insert the fluid needle (13) into the back of the
insert (4) to install the fluid packings (5).
13. Tighten the packing screw (8) just enough to hold
the packings (5) in the insert (4). The needle (13)
must move freely. Remove the needle.
14. Unscrew the pattern adjustment valve assembly
(25).
15. Remove the retaining ring (25d) and unscrew the
pattern adjustment valve (25c).
16. Remove the u-cup seals (25b) from the pattern
adjustment nut (25a). Be careful not to damage
the seal surface or the nut’s internal threads.
17. One at a time, install the new u-cup seals (25b)
with the seal installation tool (29); the u-cup lips
must face toward the tool as shown in Fig. 31.
25. Install the new u-cup seal (20) with the seal installation tool (29); the u-cup lips must face toward the
tool as shown in Fig. 31. This will help apply even
pressure to the u-cup lips and avoid damaging
them.
26. Push the u-cup seal (20) into the fluid valve nut
(19) until a definite snap is felt.
13
Fig. 29
18. Push each u-cup seal (25b) into the pattern adjustment nut (25a) until a definite snap is felt.
19. Lubricate the pattern adjustment valve (25c)
threads and install the valve into the nut (25a).
Install the retaining ring (25d), then back out the
pattern adjustment valve as far as the retaining
ring allows it to go.
20. Remove the fluid valve nut (19), air valve spring
(22), and air valve assembly (26). Discard the air
valve assembly. See Fig. 28, page 19.
21. Remove the u-cup (16) from the gun body. The
threaded end of the needle (13) can be used to
push out the u-cup. Be careful not to damage
needle or sealing surface. See Fig. 29.
22. Place the new u-cup (16) on the seal installation
tool (29), with the u-cup lips facing the tool as
shown in Fig. 30.
23. Push the packing (16) into the back of the gun until
a definite snap is felt.
Fig. 30
U-cup lips face
1
the tool
16
1
U-cup lips face the tool
1
29
29
20 or 25b
19 or 25a
1
24. Remove the u-cup seal (20) from the fluid valve nut
(19). Be careful not to damage the seal surface or the
nut’s internal threads.
Fig. 31
308741 21
Service
NOTE: To ensure proper alignment of the parts, follow
the next steps in the order they are given.
27. Slide the insert (4) into the spray housing (2a), and
install them onto the gun body (1). Align the housing with the slot and lip (A) on the gun body (1).
28. Tighten the hex nut (9) onto the insert (4) handtight, then loosen the nut about one turn so the
insert (4) and spray housing sit loosely in the gun
body.
29. Check the fluid needle (13) for damage or excessive wear. Replace needle tip or entire needle if
necessary.
30. Lubricate the outside of the new air valve assembly (26) and place it on the fluid needle (13),
against the nut (B). See Fig. 32. This helps align
the entrance of the air valve stem into the inside
diameter of the u-cup (16) without damaging the
u-cup lip.
31. Install the fluid needle (13) and the air valve
assembly (26) into the back of the gun.
33. Install the needle spring (23) and fluid adjustment
knob (21).
34. Install the trigger (10), pivot pin (17), and screw
(11). Torque the screw to 20–30 in-lb (2.3–3.4
NSm).
35. To avoid galling of the fluid nozzle seat in the insert
(4), apply a thin film of lubricant to the seat. Trigger
the gun while you install the fluid nozzle (12) with
the gun tool (28). Torque the nozzle securely to
145–155 in-lb (16–17 NSm).
36. Tighten the hex nut (9) securely to 125–135 in-lb
(14–15 NSm).
37. Install the pattern adjustment valve assembly (25).
Torque the nut (25a) to 125–135 in-lb (14–15
NSm).
38. To tighten the packing screw (8), turn the screw in
until it touches the fluid packings (5), then tighten
one full turn to pre-set the packings. Loosen the
screw, then turn it in until it touches the packings
again. Tighten the screw 1/12 turn more (equal to
half the distance between points on the hex head).
13
26
B
Fig. 32
32. Install the air valve spring (22). Point the gun down
to center the spring (22) and tighten the fluid nut
(19) to 125–135 in-lb (14–15 NSm).
39. Trigger the gun to test the needle movement. If the
needle does not return after the trigger is released
or is slow in returning, loosen the packing screw
(8) until the needle returns freely.
40. Install the air cap (14) and air cap retaining ring
(15). Hand-tighten the ring.
41. Make sure the gun fluid packings are sealing
properly by spraying solvent at low pressure
before fully pressurizing the gun with the fluid to be
sprayed.
If the fluid packings leak, tighten the packing screw
(8) slightly and retest until the packings and fluid
needle seal completely.
22 308741
Notes
308741 23
Parts
Item 2 includes 2a–2b
Item 13 includes item 13a
Item 25 includes 25a–25d
14
15
25c
25a
12
25d
1
11
4
25b
13
13a
26
16
21
19
20
22
23
24
2a2b
29
9
8
5
28
17
10
7586A
24 308741
Parts
Part No. 239559 to 239567
Pressure Feed HVLP Spray Gun Assembly
Item 2 includes 2a–2b
Item 13 includes item 13a
Item 25 includes 25a–25d
14
15
12
11
25c
25a
25b
25d
13
13a
1
16
26
21
19
20
22
23
4
2a2b
9
8
5
28
29
24
17
10
7585A
26 308741
Part No. 239574 and 239575
Gravity Feed HVLP Spray Gun Assembly
Parts
Ref.
No.
1239721BODY, gun1
2239799SPRAY HOUSING ASSY.;
2aS HOUSING, spray, gravity;
2b*111316S O-RING, CV751
4191850INSERT, fluid, gravity1
5*239640KIT, fluid packing; Includes
8192352SCREW, packing1
9192348NUT, hex; 1/2–20 UNF1
10192271TRIGGER1
11203953SCREW, trigger lock1
12lNOZZLE, fluid1
13lNEEDLE ASSY.; Includes
13alSTIP, needle1
14192329AIR CAP1
Part No.DescriptionQty.
Includes items 2a–2b
not sold separately
spreader, u-cup, and spacer
replaceable item 13a
Ref.
No.
19192355NUT, fluid valve1
1
1
1
1
20*110453U-CUP1
21192266KNOB, fluid adjustment1
22114069SPRING, air valve1
23114072SPRING, needle1
24239655SWIVEL, air1
25239653PATTERN ADJUSTMENT
25a192356S NUT, pattern adjustment1
25b*110453S U-CUP2
25c192353S VALVE, pattern adjust-
25d114068S RING, retaining1
26*240823AIR VALVE ASSY.1
28192281TOOL, gun1
29192282TOOL, packing installation1
Part No.DescriptionQty.
1
VALVE ASSY.; Includes
items 25a–25d
1
ment
15192276RING, air cap retaining1
16*188493U-CUP1
17192272PIN, pivot1
Gun
Part No.
239574
239575
Needle/
Nozzle Kit
Includes items
12–13
239592192287239645192306.055 (1.397)Gravity
239593192288239646192307.070 (1.778)Gravity
Item 12
Nozzle
Needle Assy.
Item 13
Includes
item 13a
l See chart for part number.
*These parts are included in Repair Kit 239639,
which may be purchased separately.
Item 13a
Needle Tip
Orifice Size
in. (mm)
Fluid Supply
308741 27
Accessories
Cleaning Brush 105749
For use in cleaning gun
Lubricant 111265
One 4 oz. (113 gram) tube sanitary (non-silicone)
lubricant for fluid seals and wear areas.
Fluid Whip Hose Assembly 239622
100 psi (0.7 MPa, 7 bar) Maximum Working Pressure
Eases gun movement with increased hose flexibility.
4 ft. (1.22 m) long, 3/16 in. (4.76 mm) I.D.,
3/8 npsm(fbe), nylon with polyurethane cover
Whip Hose Parts Breakdown
Part No.
239630FITTING ASSY, male
239629FITTING ASSY, swivel
061345TUBING; 1000 ft. (305 m) roll
Fluid Hose Assembly
100 psi (0.7 MPa, 7 bar) Maximum Working Pressure
3/16 in. (4.76 mm) I.D., 3/8 npsm(fbe), nylon with
polyurethane cover
Part No.Length
23963315 ft. (4.58 m)
Description
Air Hose Assembly 185353
100 psi (0.7 MPa, 7 bar) Maximum Working Pressure
Optional air hose for use when higher air flow is
required. 25 ft. (7.625 m) long, 3/8 in. (9.53 mm) I.D.,
1/4 npsm(f) swivel, buna-n
Air Control Valve Kit 243670
Install on the gun air inlet to control both the atomizing
air and the pressure in the spray gun cup (if used).
1/4 npsm x 1/4–19 BSPT.
Air Pressure Verification Kit
For use in checking air cap atomizing or pattern air
pressure at various supply air pressures. Not to be
used for actual spraying.
Install the kit air cap on the gun. Turn on the air to the
gun, then trigger the gun and read the air pressure on
the gauge.
NOTE: To be “HVLP compliant”, the atomizing air
pressure must not exceed 10 psi (70 kPa, 0.7 bar).
Part No.Orificein. (mm)
2396090.030, 0.042, 0.055
(0.762, 1.067, 1.397)
2396100.070, 0.086
(1.778, 2.184)
2396110.110 (2.790)
239612gravity
23963425 ft. (7.63 m)
Fluid Hose Parts Breakdown
Part No.Description
239629FITTING ASSY, swivel
061345TUBING; 1000 ft. (305 m) roll
Air Hose Assembly
100 psi (0.7 MPa, 7 bar) Maximum Working Pressure
5/16 in. (7.94 mm) I.D., 1/4 npsm(f) swivel, nitrile
Part No.Length
23963615 ft. (4.58 m)
23963725 ft. (7.63 m)
Air Whip Hose Assembly 239631
100 psi (0.7 MPa, 7 bar) Maximum Working Pressure
Eases gun movement with increased hose flexibility.
4 ft. (1.22 m) long, 5/16 in. (7.94 mm) I.D., 1/4 npsm(f)
swivel, nitrile
7637A
Gun Air Regulator Assy. 235119
0–100 psi (0–0.7 MPa, 0–7 bar) air
regulator to control air pressure to
gun.
NOTE: Installing the gun air regulator adds a pressure drop that could
limit the air cap pressure.
7614A
Non–Swiveling Air Inlet Fitting 195065
Replaces the standard gun swivel fitting to prevent gun
from rotating during operation
28 308741
Accessories
Gravity Cup
For use with gravity feed gun.
Nylon cup, 304 stainless steel 3/8
npsm(f) fluid inlet fitting, fluid filter
cartridge included.
Part No.Size
23971416 oz. (474 cc)
2397158 oz. (237 cc)
Gravity Cup Holder Bracket 192407
Fits both gravity cup sizes.
SST Pressure Cup Kit 239802
with single air regulator
1 qt. (0.95 liter) capacity, 304 stainless
steel cup. Includes a pressure relief
valve and a single air regulator and
gauge.
7636A
7611A
SST Pressure Cup Kit 239803
with double air regulator
1 qt. (0.95 liter) capacity, 304 stainless steel cup. Includes a pressure
relief valve, a 0–100 psi (0–0.7 MPa,
0–7 bar) air regulator for gun
atomization, and a 0–15 psi (0–104
kPa, 0–1.0 bar) air regulator for the
1 qt. pressure cup supply air.
NOTE: Installing the pressure cup kit
adds a pressure drop that could limit
the air cap pressure.
Disposable Polyethylene Cup Liners
Paint and solvent resistant. 40 liners per box.
1124901 Quart Cup Size
1124912 Quart Cup Size
7612A
1 Quart Remote SST Pressure Cup 239804
1 qt. (0.95 liter) capacity, 304 stainless steel cup.
Includes air pressure regulator and gauge, 4 ft. (1.2 m)
length air and fluid hose with 1/4 npsm(f) swivel ends,
pressure relief valve, and rigid hook handle.
7623A
308741 29
Dimensions
Technical Data
7.6 in.
(193 mm)
6.7 in.
(170 mm)
7048A
CategoryData
Maximum Working Fluid
Pressure
Maximum Working Air
Pressure
Maximum Compliant
Inbound Air Pressure
Fluid and Air Operating
Temperature Range
Weight17.1 oz. (484 g)
Air Inlet1/4–18 npsm (R1/4–19)
Fluid Inlet3/8–18 npsm (R3/8–19)
Wetted Parts304 and 17–4 PH Stainless
Noise Data*
Sound Pressure
Sound Power
100 psi (0.7 MPa, 7 bar)
100 psi (0.7 MPa, 7 bar)
40 psi (280 kPa, 2.8 bar)
32_ F to 140_ F (0_ C to 60_ C)
compound thread
compound thread
Steel, PEEK, Acetal, Ultra High
Molecular Weight Polyethylene
84.4 Db(A)
94.0 Db(A)
*All readings were taken with the gun controls fully open
and with 40 psi (280 kPa, 2.8 bar). Sound pressure was
tested to CAGI–PNUEROP–1969. Sound power was
tested to ISO 3744–1981.
30 308741
Notes
308741 31
Graco Standard Warranty
Graco warrants all equipment 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. 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 procedures concernées.
Graco Information
TO PLACE AN ORDER, contact your Graco distributor, or call one of the following numbers
to identify the distributor closest to you:
1–800–367–4023 Toll Free
612–623–6921
612–378–3505 Fax
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.
International Offices: Belgium, Korea, Hong Kong, Japan
Sales Office: Minneapolis
www.graco.com
PRINTED IN USA 308741 08/1997, Revised 01/2004
32 308741
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