Graco 307237H AUTOMATIC AIR SPRAY GUN Owner's Manual

INSTRUCTIONS-PARTS LIST
t!7;237 I
40*
ORACO
SUPERSEDES G
This manual contains IMPORTANT
WARNINGS and INSTRUCTIONS
READ AND RETAIN FOR REFERENCE
AUTOMATIC
AIR SPRAY GUN
STAINLESS STEEL FLUID PASSAGES
1W psi (7 bar) MAXIMUM WORKING PRESSURE
Model 210-744 Series C
Basic gun without needle, nozzle or air cap
With basic gun Model210-744, order the needle-nozzle
kit and .air capyou want separately. See-Page 8 for
available kits andair caps.
COMPLETE GUNS*
Model 208-603
With 0.042" nozzle; 0.033' needle;
for light viscosity fluids
Model 208-604
With 0.055"nozzle; 0.046" needle;
for medium viscosity fluids
Model 208-605
With 0.070' nozzle; 0.061" needle;
for heavy viscosity fluids
"When ordering complete guns, order model number
and stipulate the air cap you want. See page 8 for
available air caps.
INDEX
Typical Installation.............................................. 2
Installation
2
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Troubleshooting .............................................
4, 5
Service ............................................................
5
Parts List
6
How to Order Replacement Parts
............................ 6
Parts Drawing ....................................................
7
Ordering Charts..................................................
8
Accessories.. ....................................................
.9
Dimensional Drawing............................
.Back Cover
Warranty Back
Cover
........................................................
..........................................................
.............................................
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440-1444
0 COPYRIGHT 1976 GRACO INC.
TYPICAL INSTALLATION
KEY
A Automatic Air Spray Gun
B Fluid Line
C Air Filter
D &Way Air Solenoid
E Cylinder
Cvlinder Air Supply
Suooiv Line
F Atomizing Air Supply Line
0 Air Regulator
H Sensing Device
J Conveyor
K Pump
L Fluid Supply
M Fluid Pressure Reg"
INSTALLATION
Use separateair regulators (Gt t o control atomizing air
The Typical System shown above is a guide to the
air.
equipment needed for an automatic spraying system. and cylinder
For design assistance, contact your Graco representative. See available accessorieson page9.
Connect a fluid hose (B)
t o the gun's 3/8 npsm fluidinMount the gun (A) aon
0.50 in. I12 mm) diameter rod
mounting fixture whichallows you to adjust the spray
pattern direction and the
gun's distancefrom the work.
Blow out the fluid lines
( 6 ) with air then flush withsolvent t o remove dirt and contaminants before connecting tothe system.
let.
RECOMMENDED HOSE SIZES (General Purpose)
Fluid
Hose Size
0-35h (0-11 ml
35-1Wft (11-30
ml
100-200 ft 130-60 ml
3/8" ID
112" ID
3/4" ID
I
Air
Length of Run Hose
Sire
0-1Wft (0-30ml
5/16' ID
1W-200ft 130-60 ml 3/8" ID
Be sure the compressed air supply is vew clean and dry.
Install an air filter (C) to remove harmful dirt and
Adjust thesystem's sensing device(H)so the gun starts
moisture, which can affect the appearance of your
spraying just before meetingthe workpiece and stops
finished workpiece.
just after the piece haspassed.
Install a normally closed, 3-way air solenoid valve (Dl
in the cylinder airsupplyline(E).Connect an airhose
NOTE: The gun rewiresa minimum of40 psi (3 bar)
air pressure t o the cylinder. The atomizing
from the solenoid valve to the gun's 1/4 npsm(m)
air pressure is generally43-57 psi (3-4bar).
cylinder air inlet.
The fluid pressure supply is normally10 to
16 psi (0.7 t o 1.0 bar).
Connect an atomizingair SUDP~Vline (F) to the -gun's
1/4 npsm atomizingair inlet.'
NOTE: The external inlet threads of this gun are
combination American NPSM and British
Whitworth pipe thread t o allow coupling
either type of female swivel unions.
2
307-237
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OPERATION
Strain or filter the paintt o remove coarse particles and
sediment, then checkthe viscosity of your paint. Refer
t o chart on page 8 for proper viscosity.
Normal Spray Pattern
Proper adjustment will give a spray pattern
shaped like this.
Install the air cap.
See Troubleshooting Chart on page 4 for thecause and
The direction of the spray pattern is controlled by the solution of improper spray patterns.
position of theair cap. The horns of theair cap should
be the opposite direction (horizontal or vertical1 of the Cleaning
desired direction of the spray pattern. To change,
CAUTION
loosen and turn the
air cap to thedesired position and
hand tighten theair cap securely.
with.the fluid being sprayed and the wetted parts
of the gun toensure thorough flushing andt o
Adjusting The Spray Pattern
To clean the gun, flushwith a compatible solvent until
all traces of paint are removed from the gunpassages.
To minimize overspray, adjust the pattern for each part Wipe the outside of the gun clean with a solvent
being coated.
dampened cloth.
For maximum flow, leave the fluid adjusting knob in the
full open position.
CAUTION
posure to solvent damages the packings. Never
use metal instrumentst o clean holesin the air cap
or fluid nozzle to avoid scratches which can distort
shape,
The air adjusting screw (27) controls the pattern
the fluid adjusting screw(181 controls the volume of
fluid output, and the atomizing
air regulator controls the
degree of atomization.
To aaust the pattern, turn theair adjusting screw (27)
out (counterclockwise)t o make the spray pattern wider
and flat, or in (clockwise) t o decrease t o a round pattern.
If the air cap needs cleaning, removeit from the gun,
soak in solvent and scrub with fine bristled brush.To
clean out holes in the air cap, use a toothpick or other
soft implement t o avoid damaging criticalsurfaces.
WARNING
To aaust the volume of fluidoutput for pressure feed,
turn the fluid adjusting screw(18) out all of the way
(counterclockwise). Then adjust the
air pressure atthe
fluid supply until the desired fluid flow
is obtained. For
the final adjustment, turn the fluid adjusting valve in
(clockwise1to reduce the volumeof fluid output and obtain the desired results.
NOTE:
If the fluid adjusting valve is turned
in all the
way, the gun will emit only
air.
Test spray a pattern. Adjust
the air pressureto the gun
until proper atomizationis achieved.
NOTE: .Always use the lowest possible atomizing
air
pressure to obtain the desired results.
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Pressure Relief Procedure
To reduce the risk of serious bodily injury, including splashingin the eyes or on the skin, or injury from moving parts, always follow this procedure before checking or servicing any part of
the spray system, before installing, cleaning or
changing fluid nozzles, and whenever you stop
spraying.
1. Turn off the air and fluid supply to the
gun.
2. Trigger the gun into a grounded metalwaste
container to relieve air and fluid Dressure.
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Maintenance
Lubricate the exposed portion of the fluid
needle (371
daily; petroleum jelly works well.
For short term operations, patternsize may be reduced
by turning the air and fluid adjusting screws in
(clockwise).
307-237
3
TROUBLESHOOTING
Pressure Relief Procedure
To reduce the risk of serious bodily injury, including splashingin the eyes oron theskin, or injury from moving parts, always follow this procedure before checkingor servicing any part of
before installing,
cleaning
C the spray system,
W
A
R or
~
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changing fluid nozzles, and whenever you stop
spraying.
1. Turn off the air and fluid supply to the gun.
2. Trigger the gun into a grounded metal waste
container
N
l to relieve air
Nand fluid pressure.
G
GUN OPERATION TROUBLESHOOTING CHART
I
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PROBLEM
Fluid packingnut leaking
Air leakage from front of gun
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Fluid leakagefrom frontof gun
C
~~~
CAUSE
Loose needle packingnut (12. 131.
Worn packing (8, 23).
Air piston 125) and packings(2. 4,
5, 6, 71 not seating properly.
~~~
Needle 137) worn or damaged.
Worn needle andseat in fluid nozzle (36).
Needle packingnuts (12, 13) too
tight.
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SOLUTION
I
:=packn
i g.
Clean, service.
Replace needle and nozzle as a set.
Replace fluid nozzle and needle.
Lubricate and adjust.
SPRAY PATTERN TROUBLESHOOTING CHART
PROBLEM
CAUSE
SOLUTION
Fluttering or
Spitting spray
Insufficient fluid in supply container
Fill supply container.
Dry or worn fluid needle packingor loose packing
nut permits air to get into fluid passage
Lubricate or replace packings 18, 2 3 ) ;
tighten packing nuts112, 13).
Loose fluid nozzle or damagedfluid nozzle taper
seat
Tighten, or replace needle and nozzle.
Dirt betweenfluid nozzle, taper seat and body
Clean.
Loose or crackedfluid inlet fitting
Tighten, or replace housing124).
Loose fluid tube in pump or tank
Tighten.
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Fluid build up on air
cap; partially clogged horn
holes. Full air pressurefrom clean horn hole forcer
fan panem toward clogged end
Clean with soft implement or dip in
suitable solvent and wipe clean.
Damaged nozzle or air cap holes
Replace damaged part.
Fluid build up onthe perimeter of fluid nozzle
orifice, or partially clogged nozzle orifice
Remove obstruction. Never use wire
a or
hard instrument.
Too high atomization air pressure
Reduce air pressure or adjust air adjusting
screw (27).
Fluid too thin
Regulate fluid viscosity.
Not enough fluid pressure
Increase fluid pressure.
Low atomization air pressure
(271.
Increase air pressure or adjust screw
Fluid too thick
Regulate fluid viscosity.
Too much fluid
Reduce fluid pressure.
Adjust needle adjusting screw(18) until
proper pattern is obtained.
Troubleshooting Chart continued on page 5.
4
307-237
SPRAY PATTERN TROUBLESHOOTING CHART (Cont.1
PROBLEM
Streaks'
CAUSE
SOLUTION
Last coat of paint applied too wet
Apply drier finish with multiple strokes.
Too much air pressure
Use lowest air pressure necessary.
Insufficient air pressure
Increase air pressure.
Non-uniform spray pattern
Clean or replace air cap.
'Spray test patterns as you make adjustments.
SERVICE
114 npsm (CYLINDER AIRINLET)
1/4npsm IATOMlZlNGAIR INLET)
NOTE: Repair Kit 208-609 is available (see page 6). Lubricate new packings with lightweight oil or
Graco
Use allthe parts in the kit for the
best results. TSL and insert packings in cavities. Install needle (37)
Parts included in the are
kit designated with a
and piston (25"") in gun body. Slide packing nuts onto
double asterisk, for example (8"").
needle beforeinserting needle into fluid packing cavity.
NOTE: Always replace fluidnozzle gasket (35) when
replacing fluidnozzle (36).
Air Valve Service
If there is air leakage at the packing nut (12), tighten
nut. If leakage continues, replace packings (8**).
Fluid Packing Replacement
If fluidleakage occurs at packing nut
(13). tighten nut. If
leakage continues, replace packing(23"").
Loosen both packing nuts (12Et 131, then disassemble
air piston and cylinder and remove
needle (37).
Push both the needle and piston fully forward and turn
adjusting nut (17)all the way into piston. Turn adjusting
nut two turnscounterclockwise, then tighten locknut
(161 to hold adjustment.
in unWith needle in place, screw fluid packing nut (13)
til packing (23'") is fully compressed, then back
off until
free needle movement is attained. Reassemble remainder of gun inreverse order of disassembly.
For best packing life, lubricate exposed portion of
needle (37)daily; petroleum jelly works well.
Remove packing nuts and packings from cavities, then
clean and inspect all parts for wearor damage. Replace
parts as necessary.
307-237
5
PARTS LIST
M o d e l 208-603 Complete Gun
M o d e l 208-604 Complete Gun
M o d e l 208-605 Complete Gun
Include items1-37
REF PART
NO. NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
16
17
18
19
20
21
22
DESCRIPTION
210-744
Series C
**103-338
103-522
*'103-523
"103-524
"103-610
"103-649
* * 160-240
162-782
106-914
'106.916
'171.333
171-332
"106-917
170.242
170-243
170-244
170.249
724-391
AUTOMATIC AIR SPRAY GUN; bare
Includes items 2-34
.PACKING,. O-ring; Viton"
.SCREW, sq hd set; 3/8"-16 x 5/8"
.GASKET, copper asbestos
.GASKET, copper asbestos
.PACKING, O-ring; Viton"
.PACKING, O-ring; Viton"
.PACKING, v-block; leather
.LOCKNUT
.RING, air cap
STUD, coupler; 3/8" npsm
.NUT, packing; fluid needle
.NUT, packing; fluid needle
.ADAPTER, air inlet; 1/4-16-6
.NUT, lock
.NUT, needle adjusting
.SCREW, needle adjusting
.CYLINDER, air piston
SPRING. comoression: 2.0"
151 mmi long'
170-253 .SPRING, compression; 1.375
135 mrn) long
171-722 .HOUSING, valve
QTY
23
1
1
1
1
2
1
1
1
1
1
2
1
1
PART DESCRIPTION
1
1
1
1
1
Viton" andPTFE are registered trademarks
of the Do Pont
Company.
1
I
1
1
1
1
1
1. To be sure youreceive the correct replacementparts,
kit or accessories, always giveall of the information
requested in the chart below.
2. Check the parts list
to identify the correct part
number;
do not use the ref. no. when ordering,
3. Order all parts from your nearst Graco distributor,
I
1
1
""Included in repair kitZm-609.
HOW TO ORDER REPLACEMENT PARTS
6 digit
PART
NUMBER
37
1
1
1
2
25
28
"
1
*Recommended "tool box" spare parts. Keep on hand to
reduce down time.
1
1
1
23
36
1
1
1
1
1
~
"*168-110
29
105-456
31
176-773
32 169-883
33
217-020
34 '10E-900
35 '108-784
.PACKING, needle
.HOUSING, valve
.PISTON, air
.BAFFLE. air
.AIR ADjUSTING SCREW ASSY
Includes items28-33
..PACKING, O-ring; Viton"
..RING, retaining
..HOUSING; spring
..WASHER, flat; steel
..SCREW,
usting
.GASKET.PTFE
GASKET,'fluid nozzle; polyethylene
NOZZLE; see chan onpage 8
NEEDLE; see chan onpage 8
AIR CAP; see chan on page8
38
aty.
6
7
8
28
CITY
1
(Must bepurchased separately)
Consists of:
2
4
5
"106-901
24 210-743
25 "208-718
26 106-913
n
106-121
DESCRIPTION
1
208-609 ReDair Kit
Ref NO.
REF PART
NO. NO.
1
SERVICE INFORMATION
Listed below by theassembly changed are OLD and
NEW parts.
ASSEMBLY PART
REF PART
Models
106-907 Gasket
208-603, NEW 35 108-784 Gasket
208-605
INTERCHANGEABILITY NOTE: ,NEW parts replace
OLD parts listed directly above them.
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PARTS DRAWING
Complete gun includes:
I
Model 208-603
Model 208-604
Model 208-605
I Needle (Ref. No. 371 I
1
170-245 10.033”)
170-246 10.046”l
170-247 10.061”)
I
Nozzle (Ref. No.
361
176800 (0.042”)
176-801 (0.055‘1
176.802 ~1n70”1
I
Ref NO. 1
Bare Gun
Includes items 2-34
Ref No. Zl
Air Adjusting Screw Assy
Includes items 28-33
10
307-237
7
."
"y-.%wh?wW"
ORDERING CHARTS
*E&&ma&A??-s&~
EXTERNAL MIX AIR CAPS
With NEEDLE NOZZLE KITS, use
h e NOTE below1
THIN FLUIDS:
HEAVY FLUIDS:
SPRAY
PAlTERN*
AIR CONSUMPTION
30 Dsi I2 bar) I 50 Dsi (3.5barl I 70 Dsi I5 barl
at8'1200 mrnl
5-14 Seconds[No. 4 FordCup). 16-20 Seconds (No. 2 Zahn Cupl, 10-30 cps; stains, solvents
sealers, lacquers. primers, zinc chromates, acrvlics, wafer and similar fluids.
AIR TYPE
CAPS FEED
*x*
.
,
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Heavy adhesives and mastics
*Spray Patterns determined spraying50 cps enamel a t
""Includes ring.
**Xll
P,,=Pressure
M)
psi (4 bar) air pressure,with 10 psi 10.7 bar1 fluid pressure.
NOTE: When selecting air capsfor use with complete gun
models, select from air caps recommended for use
with needle-nozzle kits having the same size needle
and nozzle as the complete gun.
Model 208-603
Model 208-604
Model 208-605
Kit NO.208-606
Kit No. 208-607
Kit No. 208-608
NEEDLE-NOZZLE CONVERSION KITS (Must be ordered separately)
Includes matchedneedle and nozzle and nozzle gasket 103-464.
Light Viscosity
208-606
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ACCESSORI.ES ( m u s t be purchased separately)
GROUNDED BUNA-N AIR SUPPLY HOSE
175psi (12 bad MAXIMUM WORKING PRESSURE
AIR FILTERS 40 micron filtration
106-146
250 psi (77.5 barl MAXIMUM WORKING
PRESSURE
5-125 psi (0.359bar) regulated pressure range
with
gauge. 4 02. bowl withsight glass. 1/2 npt (f)
106-14n
FLUID REGULATORS
250 osi 118 bad MAXIMUM WORKING PRESSURE
~~~
~
To reduce and regulate fluid pressure
to one air spray
gun. 3/8 npsrn(m) and3/8 npt(f) fluid outlets.
208-831 0-60psi (0-4 bar) regulated pressure range
204-500 0-15 psi (0-1 bar) regulated pressure range
205-425 0-60psi (0-4 bar) regulated pressure range
2Gps1'117.5 bar1 MAXIMUM WORKING
PRESSURE
Without gauge. 3/8 npt(f).
PAINT STRAINER 202-271
V
9w psi 163 bar1 MAXIMUM WORKING PRESSURE
AIR PRESSURE REGULATOR 207-755
10- 125 psi 11-9 barl MAXIMUM WORKING
PRESSURE
AIR PRESSURE GAUGE 101-1
0 2 0 0 psi (0-14 bar1 range
3/4 npt Inlet & Outlet
307-237
9
DIMENSIONAL DRAWING
3.69
THE GRACO WARRANTY AND DISCLAIMERS
WARRANN
Graco warrantsall equipment manufactured byit and bearingits name to be free from defectsin material end workmanshipon the date of sele
by an authorized Graco dbtn'butor
to the original purchaser for use. As purchaser's sole remedy for breach of this warranty, Graco will, for a
the
period of twelve months from the date
of sale, repair or replace anypan of the equipment proven defective. This warranty applies only when
equipment is installed, operated end maintained in accordance
with Graco's written recommendations.
This warranty does not covar, end Graco shallnot be liable for, any malfunction, damage or wear caused
by faulty installation, misapplication,
abrasion, corrosion, inadequateor improper maintenance, negligence, accident, tampering. or substitutionof non-Gram component parts. Nor
shall Grem be M e f w malfunnion, damage M weer caused by the incm@atlbiGty with Gram equipment of structures, accessories, equipment or materials not supplied by Graco, or the improper design, manufacture. installation, operation or maintenance of structures, acceaories. equipment or materials not supplied by Graco.
This warranty is conditioned upon the prepaid return
of the equipment claimadto be defective for examination by Graco
to verify the claimed
defect. If the claimed defectis verified. Graco will repair or replaca free of charge any defective parts. The equipmentwill be ratumed to the
original purchaser transportation prepaid.
If inspection of the equipment does not disclose any defectin material or workmanship,repain will be
made at a reasonable charge, which charges may include
the the costs of parts. labor and transpottation.
DISC~AIME~S AND LIMITATIONS
EQUIPMENT NOT COVERED BY GRACO WARRANTY
GRACO MAKES NO WARRANTY, AND DISCLAIMS ALL IMPLIED WARRANTIESOF MERCHANTABILITY AND FITNESS FOR A PARTICUIAR PURPOSE, WITH RESPECT TO ACCESSORIES, EIIUIPMENT, MATERIALS, OR COMPONENTS SOLD BUT NOT MANUFACTURED BY GRACO. These items sold, but not manufactured by Graco (suchas electric mot0r. switches, hose.etc.). are subjectto the warranty, Y any, of their manufacturer. Gracowill provide purchaserwith reasonable assistancein making any claim for breachof these warranties.
i
Factory Branches: Atlanta. Dallas, Detroit, Los Angelea. West CaldwellIN.J.1
Subsidiary andAffiliite Companies: Canada: England: Switzerland: France: Germany: Hong Kong: Japan
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440-1444
PRINTED IN U.S.A. W-Pl 1075 Revised 2 8 1
c,
-