DeVilbiss | SB-2-001-F | SB-2-259-B JGA-504 CONVENTIONAL SPRAY GUN

SB-2-259-B JGA-504 CONVENTIONAL SPRAY GUN
SERVICE BULLETIN
SB-2-259-B
Replaces SB-2-259-A
Repair Kit KK-5058-2
JGA-504 CONVENTIONAL SPRAY GUN
IMPORTANT: Before using this equipment, read all safety precautions and
instructions. Keep for future use.
Note
Protective coating and rust inhibitors
have been used to keep the gun
in good condition prior to shipment.
Before using the gun, flush it with
solvents so that these materials will
be removed from fluid passages.
DESCRIPTION
The standard JGA-504 spray gun is a general
purpose, heavy duty, high production
spray gun suitable for use with most types
of materials. The fluid passageway is
plated brass and aluminum. The fluid tip
and needle are 300 series stainless steel.
OPERATION
Mix, prepare and strain the material to be
sprayed according to the paint
manufacturer's instructions.
Strain material through a 60 or 90 mesh
screen.
Halogenated hydrocarbon solvents
- for example; 1, 1, 1 - trichloroethane
and methylene chloride - can chemically react with the aluminum in
this gun and cause an explosion
hazard. Read the label or data sheet
for the material you intend to
spray. Do not use spray materials
containing these solvents with this
spray gun.
Important: This gun may be used with
most common coating and finishing
materials. It is designed for use with mildly
corrosive and nonabrasive materials.
If used with other high corrosive or
abrasive materials, it must be expected
that frequent and thorough cleaning will
be required and the necessity for replacement of parts will be increased.
INSTALLATION
1.
Attach the air supply line to the air
inlet (26). An air transformer installed
as close as possible to the gun will
provide filtered and regulated air.
Note
When larger diameter air hoses
are used, it is advisable to use an
8' or 10' "whip end" or a smaller
diameter hose at the gun for
greater flexibility or movement.
2.
Attach the suction feed cup or fluid
hose to the material inlet.
1.
Fill the suction or pressure feed cup
with the material. Do not overfill. Make
sure that the cup lid vent hole is clear,
if using a suction cup.
2.
Turn on the gun air at the source of
supply. Adjust the atomization air pressure to 35 psi.
3.
Turn on the supply air to the pressure
cup if used.
4.
Open the spreader adjustment valve
(10) (Fan) by turning the valve stem
counter-clockwise.
5.
Open the fluid needle adjusting screw
(17) by turning counter-clockwise.
6.
Spray a test area.
If the finish is too sandy and dry, the
material flow may be too low for the atomization air pressure being used.
If the finish sags, there is too much material
flowing for the atomization air pressure
being used.
Both of the above can be corrected by
increasing or decreasing the atomization
air pressure or the material flow. Pattern
width can be altered by turning the spreader
adjustment valve (10), either clockwise to
decrease the width or counter-clockwise
to increase the width.
See Spray Gun Guide SB-2-001 (latest
revision) for details concerning set up of
spray guns.
PREVENTIVE MAINTENANCE
To clean air cap and fluid tip, brush exterior
with a stiff bristle brush. If necessary
to clean cap holes, use a broom straw
or toothpick. Never use a wire or hard
instrument. This may scratch or burr
holes causing a distorted spray pattern.
To clean fluid passages, remove excess
material at source, then flush with a suitable solvent using a device such as the
SolventSaver™ (see Accessories). Wipe
gun exterior with a solvent dampened
cloth. Never completely immerse in
solvent as this is detrimental to the
lubricants and packings.
Note
When replacing the fluid tip or fluid
needle, replace both at the same
time. Using worn parts can cause
fluid leakage. See Charts 1 and 2.
Also, replace the needle packing
at this time. Lightly lubricate the
threads of the fluid tip before
reassembling. Torque to 15-20 ft. lbs.
Do not overtighten the fluid tip.
To prevent damage to the fluid tip
(5) or fluid needle (11), be sure to
either 1) pull the trigger and hold
while tightening or loosening the
fluid tip or 2) remove fluid needle
adjusting screw (17) to relieve
spring pressure against needle
collar.
Page 2
SB-2-259-B
SAFETY PRECAUTIONS
This manual contains information that is improtant for you to know and understand. This information relates to USER SAFETY
and PREVENTING EQUIPMENT PROBLEMS. To help you recognize this information, we use the following symbols.
Please pay particular attention to these sections.
Note
Important safety information - A hazard
that may cause serious injury or loss
of life.
Important information that tells how
to prevent damage to equipment, or
how to avoid a situation that may
cause minor inury.
Information that you should pay special
attention to.
The following hazards may occur during the normal use of this equipment.
Please read the following chart before using this equipment.
HAZARD
CAUSE
SAFEGUARDS
Fire
Solvent and coatings can be highly flammable
or combustible especially when sprayed.
Adequate exhaust must be provided to keep air free of
accumulations of flammable vapors.
Smoking must never be allowed in the spray area.
Fire extinguishing equipment must be present in the spray area.
Solvent
Spray
During use and while cleaning and flushing,
solvents can be forcefully expelled from fluid
and air passages. Some solvents can cause
eye injury.
Wear eye protection.
Inhaling Toxic
Substances
Certain materials may be harmful if inhaled, or
if there is contact with the skin.
Follow the requirements of the Material Safety Data Sheet
supplied by your coating material manufacturer.
Adequate exhaust must be provided to keep the air free of
accumulations of toxic materials.
Use a mask or respirator whenever there is a chanced of inhaling
sprayed materials. The mask must be compatible with the
material being sprayed and its concentration. Equipment must be
as prescribed by an industrial hygienist or safety expert, and be
NIOSH approved.
Explosion Hazard Incompatible
Materials
Halogenated hydrocarbon solvents - for
example; methylene chloride and 1, 1, 1 Trichloroethane are not chemically compatible
with the aluminum that might be used in many
system components. The chemical reaction
caused by these solvents reacting with
aluminum can become violent and lead to
an equipment explosion.
Guns with stainless steel internal passageways may be used
with these solvents. However, aluminum is widely used in other
spray application equipment - such as material pumps, regulators, valves, this gun and cups. Check all equipment items before
use and make sure they can also be used safely with these
solvents. Read the label or data sheet for the material you intend
to spray. If in doubt as to whether or not a coating or cleaning
material is compatible, contact your material supplier.
General Safety
Improper operation or maintenance of
equipment.
Operators should be given adequate training in the safe use and
maintenance of the equipment (in accordance with the requirements of NFPA-33, Chapter 15). Users must comply with all local
and national codes of practice and insurance company requirements governing ventilation, fire precautions, operation, maintenance and housekeeping. These are OSHA Sections 1910.94
and 1910.107 and NFPA-33.
Cumulative Trauma
Disorders (“CTD’s”)
Use of hand tools may cause cumulative
trauma disorders (“CTD’s”).
CTD’s, or musculoskeletal disorders,
involve damage to
the hands, wrist,
elbows, shoulders,
neck and back. Carpal
tunnel syndrome and
tendinitis (such as
tennis elbow or
rotator cuff
syndrome) are
examples of CTD’s.
CTD's when using hand tools, tend to affect
the upper extremities. Factors which may
increase therisk of developing a CTD include:
Pain, tingling, or numbness in the shoulder, forearm, wrist,
hands or fingers, especially during the night, may be early
symptoms of a CTD. Do not ignore them. Should you experience
any such symptoms, see a physician immediately. Other early
symptoms may include vague discomfort in the hand, loss of
manual dexterity, and nonspecific pain in the arm. Ignoring early
symptoms and continued repetitive use of the arm, wrist and
hand can lead to serious disability. Risk is reduced by avoiding
or lessening factors 1-7.
1. High frequency of the activity.
2. Excessive force, such as gripping, pinching,
or pressing with the hands and fingers.
3. Extreme or awkward finger, wrist, or arm
positions.
4. Excessive duration of the activity.
5. Tool vibration.
6. Repeated pressure on a body part.
7. Working in cold temperatures.
CTD’s can also be caused by such activities
as sewing, golf, tennis bowling, to name a few.
SB-2-259-B
SPRAY GUN LUBRICATION
Daily, apply a drop of SSL-10* spray gun
lube at trigger bearing stud (28) and the
stem of air valve (20) where it enters air
valve assembly. The shank of fluid needle
(11) where it enters packing nut (9) should
also be oiled. Fluid needle packing (8)
should be lubricated periodically. Make
sure baffle (6) and retaining ring (3) threads
are clean and free of foreign matter.
Before assembling retaining ring to baffle,
clean the threads thoroughly, then add
two drops of SSL-10 spray gun lube to
threads. Fluid needle spring (14) and air
valve spring (19) should be coated with
a very light grease, making sure that
any excess grease will not clog the air
passages. For best results, lubricate the
points indicated, daily.
* Not for air tools or high RPM equipment.
A.
B.
C.
D.
E.
Page 3
Chart 1
Air Caps, Fluid Tips, Fluid Needles and Applications
No. on
Air Cap
Order
No.
Suction Feed
Air Cap
With Ring
(Ref. No. 4)
Type of
Fluid
Delivery
80
MB-4039-80
SUCTION
GTI-413
AV-213-16
OR
AV-213-18
9000
AV-440-9000
SUCTION
OR
PRESSURE
GTI-413
AV-213-16
OR
AV-213-18
765
AV-440-765
PRESSURE
GTI-449-12 AV-213-12
777
AV-440-777
PRESSURE
GTI-449-12 AV-213-14
A
Fluid
Fluid Tips
Fluid
Fluid Tips
Needle
Used
Needle
Used
(Ref. No. 11) (Ref. No. 5) (Ref. No. 11) (Ref. No. 5)
Chart 2
Fluid Tips Available
Tip Size
in.
mm
0.039
1.0
0.047
1.2
0.055
1.4
0.063
1.6
0.070
1.8
Trigger Points
Packing
Adjusting Knobs
Baffle Threads
Air Valve Cartridge
Pressure Feed
Fluid Tip
(Ref. No. 5)
Type of Fluid
Delivery
AV-213-10
AV-213-12
AV-213-14
AV-213-16
AV-213-18
Pressure Feed
Pressure Feed
Pressure Feed
Suction Feed
Suction Feed
PARTS REPLACEMENT
Figure 1 Air Cap
Air Cap No.
N
o
GTI-449-12
AV-213-10
OR
AV-213-12
4. Assemble seal to baffle with angled
side up as shown in diagram. NOTE:
The seal should be a tight fit on the
baffle. If it is a loose fit on the baffle,
assure that it is assembled with the
angled side up.
5. Install baffle on gun.
6. Install fluid tip (5) and tighten to
15-20 ft-lbs.
JGA-4035 Packing Replacement
Instructions
Needle
XX
C
Gun Body
DeVilbiss
D
B
1. Remove Fluid Tip (5).
2. Remove Baffle (6).
3. Remove Seal (7) from baffle.
NOTE
PARTS REPLACEMENT
FLUID INLET GASKET (32)
REPLACEMENT INSTUCTIONS
2.
3.
4.
5.
Packing
Nut
E
GTI-33 Baffle Seal Replacement
1.
Packing
(3 pieces)
Remove fluid inlet adapter (34) with
appropriate wrench.
Clean Loctite from gun body inlet
threads and seal area.
Place gasket (32) squarely onto the
fluid inlet adapter and push it down
until it is flat against the shoulder.
Use medium strength thread sealant
(i.e. Devcon 2242 blue, or equal) on
threads before installing fluid inlet
adapter.
Torque fluid inlet adapter to 20-25 ft.
lbs. and tighten locknut.
The seal is designed to be a tight
fit on the baffle. The seal should
be able to be removed using
your fingers. If you are unable
to remove the seal using your
fingers, insert a small screwdriver between the outer lip and
the back of the baffle and pry
the seal off.
ANGLED SIDE
SEAL
THICK SIDE
Pry here if
necessary
BAFFLE
1. Remove adjusting knob and needle
spring from gun.
2. Partially withdraw needle from gun
body.
3. Loosen packing nut and remove.
4. Remove old packing.
5. Assemble packing nut to needle.
6. Assemble packing in order shown
to needle.
7. Insert needle all the way into gun
body seating in tip.
8. Install needle spring and adjusting
knob.
9. Thread packing nut into gun body.
10. Tighten packing nut in equal
increments - no more than
1/6 turn at a time.
11. After each adjustment, pull needle
open and observe needle closure.
12. If needle snaps shut, continue
adjusting nut until there is evidence
of needle bind or slow closing.
13. Back off packing nut 1/12 turn to the
point where needle snaps shut.
Packing nut must remain tight
enough to prevent loosening by
hand.
14. Pull needle several times to verify
needle snaps shut and check
packing nut for looseness.
Page 4
SB-2-259-B
18
17
16
15
14
13
12
10
11
36 37 38
39
4
6
7
5
OR
4
Fluid Tip
(Torque to
15-20 ft. lbs.)
1
8
2
3
19
12
20
23
22
21
24
PARTS LIST
Ref.
No.
Replacement
Part No.
1
2
3
4
5
6
•7
•8
9
10
11
•12
--JGA-156-K10
GTI-3
See Chart 1
See Charts 1 & 2
GTI-425
GTI-33-K5
JGA-4035-K5
34411-122-K10
GTI-405
See Chart 1
JGS-72-K10
13
•14
•15
16
------MBD-19-K10
17
18
•19
•20
21
GTI-414
KK-5059
-------
*26 Air Inlet Nipple
9
1/4" NPS(M)
(torque to 15 ft. lbs.)
40
32
33
28
29
27
*34
30
*Use medium strength
thread sealant (i.e.
Devcon #2242 Blue,
or equal) on threads.
35
25
Fluid Inlet Nipple
3/8" NPS(M)
(torque to 20-25 ft. lbs.)
Description
Air Cap
Spring Clip (Kit of 10)
Air Cap Retaining Ring
Air Cap & Retaining Ring
Fluid Tip
Baffle Assembly
Baffle Seal (Kit of 5)
Packing (Kit of 5)
Packing Nut
Spreader Valve Assembly
Fluid Needle
Gasket Kit (PTFE)
PTFE
(Kit of 10)
Body Bushing
Fluid Needle Spring
Spring Pad
Spring and Pad
(Kit of 10)
Needle Adjusting Screw
Bushing, Spring, Pad and
Knob Kit
Air Valve Spring
Air Valve
Air Valve Body
Ind.
Parts
Req.
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
31
Ref.
No.
Replacement
Part No.
•22
•23
•24
25
26
------JGS-449-1
P-MB-51
27
28
29
30
31
•32
33
34
35
•36
•37
•38
39
40
----JGS-478
--JGS-477-1
------JGA-4042
------GTI-428-K5
---
Description
U Cup Seal
Washer
Snap Ring
Air Valve Assembly
Air Inlet Nipple
1/4" NPS(M)
Trigger Stud Screw
Trigger Stud
Stud and Screw Kit
Trigger
Trigger, Stud & Screw Kit
Fluid Inlet Gasket (PTFE)
PTFE
Locknut
Fluid Inlet Adapter
Fluid Inlet, Gasket, Nut Kit
Retaining Clip
Seal
Pin
Clip, Seal & Pin Kit (5 each)
Plug
Ind.
Parts
Req.
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
• KK-5058-2 Gun Repair Kit includes a quantity of necessary parts.
Suffixes -K5, -K10 designate kits of multiple parts.
Example: JGA-4035-K5 is a kit of 5 packings.
SB-2-259-B
Page 5
TROUBLESHOOTING
CONDITION
CAUSE
CORRECTION
Heavy top or
bottom pattern
Horn holes plugged.
Obstruction on top or bottom of fluid tip.
Cap and/or tip seat dirty.
Clean. Ream with nonmetallic point.
Clean.
Clean.
Heavy right or
left side pattern
Left or right side horn holes plugged.
Dirt on left or right side of fluid tip.
Clean. Ream with nonmetallic point.
Clean.
Remedies for the top-heavy, bottom-heavy, right-heavy and left-heavy patterns:
1) Determine if the obstruction is on the air cap or the fluid tip. Do this by making a test spray
pattern. Then, rotate the cap one-half turn and spray another pattern. If the defect is inverted,
obstruction is on the air cap. Clean the air cap as previously instructed.
2) If the defect is not inverted, it is on the fluid tip. Check for a fine burr on the edge of the fluid tip.
Remove with #600 wet or dry sand paper.
3) Check for dried paint just inside the opening. Remove paint by washing with solvent.
Heavy center pattern
Fluid pressure too high for atomization
air (pressure feed).
Material flow exceeds air cap's capacity.
Atomizing pressure too low.
Material too thick.
Split spray pattern
Spreader adjusting valve set too high.
Reduce at transformer or gun.
Increase fluid pressure (increases gun
handling speed).
Adjust.
Jerky or fluttering spray
*Loose or damaged fluid tip/seat.
Material level too low.
Container tipped too far.
Obstruction in fluid passage.
Loose or broken fluid tube or fluid inlet nipple.
Dry or loose fluid needle packing nut.
Tighten or replace.
Refill.
Hold more upright.
Backflush with solvent.
Tighten or replace.
Lubricate or tighten.
Unable to get round spray
Spreader adjustment screw not seating properly.
Air cap retaining ring loose.
Clean or replace.
Tighten.
Will not spray
No air pressure at gun.
Internal mix or pressure feed air cap and tip
used with suction feed.
Fluid pressure too low with internal mix cap and
pressure tank.
Fluid needle adjusting screw not open enough.
Fluid too heavy for suction feed.
Check air supply and air lines.
Change to proper suction feed air cap and tip.
Starved spray pattern
Atomization air pressure too high.
Fluid pressure too low (pressure feed only).
Balance air and fluid pressure.
Increase spray pattern width with spreader
adjustment valve.
Thin or lower fluid flow.
Spreader adjustment valve set too low. Adjust.
Increase pressure.
Thin to proper consistency.
Open fluid needle adjusting screw.
Thin material or change to pressure feed.
Low atomization air pressure (suction feed)
Back fluid adjusting screw out to first thread
or increase fluid pressure at tank.
Increase air pressure and rebalance gun.
Excessive overspray
Too much atomization air pressure.
Gun too far from work surface.
Improper stroking (arcing, gun motion too fast).
Reduce pressure.
Adjust to proper distance.
Move at moderate pace, parallel to work surface.
Excessive fog
Too much, or too fast-drying thinner.
Too much atomization air pressure.
Remix properly.
Reduce pressure.
Dry Spray
Air pressure too high.
Gun tip too far from work surface.
Gun motion too fast.
Gun out of adjustment.
Reduce air pressure.
Adjust to proper distance.
Slow down.
Adjust.
Fluid leaking from
packing nut
Packing nut loose.
Packing worn or dry.
Tighten, do not bind needle.
Replace or lubricate.
Paint bubbles in cup.
Fluid tip not tight.
Tighten tip to 15-20 ft. lbs.
*Most common problem.
Inadequate material flow.
Increase fluid pressure at tank.
Page 6
SB-2-259-B
Troubleshooting (continued)
CONDITION
CAUSE
CORRECTION
Fluid leaking or dripping
from front of gun
Packing nut too tight.
Adjust.
Dry packing.
Fluid tip or needle worn or damaged.
Foreign matter in tip.
Fluid needle spring broken.
Wrong size needle or tip.
Lubricate.
Replace tip and needle.
Clean.
Replace.
Replace.
Runs and sags
Too much material flow.
Material too thin.
Gun tilted on an angle, or gun motion
too slow.
Adjust gun or reduce fluid pressure.
Mix properly or apply light coats.
Hold gun at right angle to work and adapt to
proper gun technique.
Thin, sandy coarse finish
drying before it flows out
Gun too far from surface.
Check distance. Normally approx. 6-8".
Too much air pressure.
Improper thinner being used.
Reduce air pressure and check spray pattern.
Follow paint manufacturer'smixing instructions.
Gun too close to surface.
Check distance. Normally approx. 6-8".
Too much material coarsely atomized.
Air pressure too low.
Increase air pressure or reduce fluid pressure.
Follow paint manufacturer'smixing instructions.
Follow paint manufacturer'smixing instructions.
Properly clean and prepare.
Thick, dimpled finish
"orange peel".
Improper thinner being used.
Material not properly mixed.
Surface rough, oily, dirty.
SB-2-259-B
ACCESSORIES
WR-103
Wrench
HARG-510
Air Regulator
HAV-500 OR
HAV-501
Adjusting
Valve
MSP-524 Twin
Cartridge,
Paint Spray
Respirator
Spray Gun Lube
SSL-10
Page 7
192212 Professional Spray Gun Cleaning Kit
(HAV-501 SHOWN)
Contains all necessary tip, hose and
nut sizes used on or
with gun.
192218 Scrubs®
Hand Cleaner
Towels
Premoistened
waterless hand
cleaner towels for
painters, body men
and mechanics.
Use to maintain
nearly constant outlet pressure despite
changes in inlet
pressure and downstream flow.
JGA-156-K10
Spring Clip
Joins any single
piece DeVilbiss
air cap with latest
version MBC-368,
GTI-3 or MSA-1 retaining ring. Helps
prevent parts loss
and provides easier
assembly.
HAV-500 does not
have
pressure
gauge. Use to control air usage at gun.
TGC-545 (Alum.)
TLC-555 (PTFE
PTFE
Lined), 2 Qt. Drip
Free Suction Cup
NIOSH-Certified
(TC-84A-1623 for
respiratory protection in atmospheres
not immediately
dangerous to life.
Compatible with all
paint materials: contains no silicone or
petroleum distillates to contaminate
paint. MSDS available upon request.
Contains six precision tools designed to effectively
clean all DeVilbiss, Binks, Finishline and other brand
spray guns.
GTI-415
Air Adjusting
Valve
HAF-507
Whirlwind™
In-Line Air Filter
Automotive Quick Connects For HVLP
Guns (Air) High Flow Type.
HC-4419 Stem
1/4" NPT(F)
Cup has a unique,
two position valve
which permits selection of either a dripfree or conventional
open vent mode.
Installs into gun to
enable user to control and reduce air
usage at the gun.
Replaces JGA-132
plug.
Removes water, oil,
and debris from the
air line.
HC-1166 Stem
1/4" NPT(M)
HC-4719
Coupler
1/4" NPT(M) /
NPS(M)
HC-4720
Coupler
1/4" NPT(F)
Page 8
SB-2-259-B
WARRANTY
This product is covered by DeVilbiss' 1 Year Limited Warranty.
DeVilbiss Worldwide Sales and Service Listing: www.devilbiss.com
DeVilbiss Automotive Refinishing
DeVilbiss has authorized distributors throughout the world.
For equipment, parts and service, check the Yellow Pages
under “Automotive Body Shop Equipment and Supplies.”
For technical assistance, see listing below.
U.S./Canada Customer Service Office:
1724 Indian Wood Circle, Suite J-K, Maumee, OH 43537
Toll-Free Telephone: 1-800-445-3988 (U.S.A. and Canada only)
Toll-Free Fax: 1-800-445-6643
9/07 ©2007
Inc. All rights reserved. Printed in U.S.A.
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