Graco PRO 3500sc Operation manual

This manual contains IMPORT ANT
W
ARNINGS AND INSTRUCTIONS
READ AND RET AIN FOR REFERENCE
 Rev. D
Supersedes C
308–055
PRO 3500SC  Electrostatic Spray Gun
FLUID SUPPL Y HOSE CONVERSION KIT
Kit Part No. 223–780
For PRO 3500SC Electrostatic Spray Gun, part no.
222–300.
See instruction manual 307–912 for complete
gun instructions and safety warnings.
This kit is designed to maintain a proper electrostatic field
when spraying conductive solvent-based fluids with a
resistivity
range of 2.0 megohm cm to infinity , measured
with a Graco Paint Resistance Meter. See
ACCESSORIES to order the meter.
WARNING
To
avoid static sparking, which could result in fire or
explosion and serious bodily injury or property
damage, DO NOT use this kit with fluids having a
resistivity
less than 2.0 megohm cm.
ALWAYS ground the fluid source by using a ground
wire and clamp. NEVER electrically isolate the fluid
source.
NOTE:This kit has not been tested by the Canadian Standards
Association. Installing this kit to certified or approved
electrostatic systems voids previous C.S.A. certifica-
tion.
INSTALLATION
WARNING
Installing,
operating, and servicing this equipment
requires access to parts which may cause electric
shock or other serious bodily injury if work is not
performed properly. Read and follow all safety
warnings in instruction manual 307–912. Do not
install, operate, or service this equipment
unless you are trained and qualified.
BEFORE servicing the fluid nozzle or spray gun,
and before disassembling the gun, always turn
the
ES ON-OFF valve lever to OFF , turn of f the air
and fluid supply to the gun, and trigger the gun to
relieve the fluid pressure.
BE SURE your installation complies with National,
State, and Local codes for the installation of elec -
trical
apparatus in a Class 1, Group D, Divisions 1
and 2 Hazardous Location.
PRO 3500SC Gun Disassembly
1. Remove the fluid tube fitting (B) and fluid seal (A)
from
the gun. See Fig 1.
2. Remove the air fitting (D), exhaust tube clamp (F),
and the exhaust tube (E).
Keep these parts for
reassembly.
Fig 1
AB
KEY
AFluid Seal
B Fluid T ube Fitting
C Gun Fitting Bracket
D Air Fitting
E Exhaust T ube
F Exhaust T ube Clamp
G Fluid T ube Nut
HFerrules
E
F
D
C
G
H
3. Remove the gun fitting bracket (C) with the hose
assembly.
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1441
 COPYRIGHT 1990, GRACO INC.

Fig 2
E
D
9
2
56
789
10
6
Outer
Hose
Jacket
117 2 5
Conductive Hose Lay -
er MUST NOT extend
beyond ferrule (7)
F
KEY
DAir Fitting
E Exhaust T ube
F
Exhaust T ube Clamp
1 Barbed Insert
2Fitting
3, 4, 17 O–Rings
5Nut
6 Fluid Hose
7Ferrule
8 Ferrule Housing
9 Gun Fitting Bracket
10 Fluid T ube Nut
3
4

INSTALLATION
Connect the Fluid Hose to the Spray
Gun
1. Using petroleum jelly , lubricate the o-rings (4 &
17) on the hose barbed insert (1). Refer to Fig 2.
Then push the hose barbed insert into the gun
barrel until the gun barrel is pressed against the
shoulder of the barbed insert.
2. Tighten the fitting (2) until the o-ring (3) on the
fitting is compressed to about half its original
thickness.
3. Tighten
the nut (5) against the fitting (2).
4. Align the bracket (9) holes with the air inlet and
exhaust outlet, and secure the bracket with the
air fitting (D).
5. Press the exhaust tube (E) onto the barb and
secure
it with the exhaust tube clamp (F).
NOTE: The fluid hose (6) consists of an insulated
layer,
a conductive layer , and an abrasion-
resistant outer layer. The conductive layer
is connected to ground at the gun fitting
bracket (9).
SERVICE NOTES
Tighten until o-ring is com -
pressed to about half its
original thickness
Left hand thread
Apply high strength Loctite 
T
orque to 35 to 45 in–lbs
(4 to 5.1 N m)
Left hand thread
Press Exhaust T ube
onto Barb
Hose Ferrule
T orque to 80 in–lbs
(9.1 N m)
Will remain in
gun when hose
removed


PARTS DRA WING
1
2
5
7
8
6
910
REF
6
3
417
REF 6
16
Part No. 223–780
Fluid Supply Hose Conversion Kit
PARTS LIST
REF
NO. P ART NO. DESCRIPTION QTY
1 186–543 INSERT
, barbed 1
2 180–553
FITTING, male 1
3 110–749
O-RING; fluoroelastomer 1
4 110–736
O-RING; V iton1
5 107–208 NUT, ferrule 1
6 186–542
HOSE, fluid; 25 ft (7.6 m) long 1
7 185–549
FERRULE, hose 2
8 185–547
HOUSING, ferrule 2
9 185–566 BRACKET
, fitting 1
10 185–548 NUT
; 5/8–24 UNEF–2B 2
16 179–996 CONNECT
OR; 3/8–18 npt(f) 1
17 103–337 O-RING; V iton 1
Viton  is a registered trademark of the Du Pont Company .
Loctite
 is a registered trademark of the Loctite Corporation.
HOW T O ORDER REPLACEMENT P ARTS
1. To be sure you receive the correct replacement parts, kits or
accessories, always give all 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 nearest Graco distributor .
6 digit
Part
Number Qty
Part Description
SERVICE INFORMATION
This manual was changed from Rev C to Rev D to correct
item 6 part no. from 185–542 to 186–542.
ACCESSORIES
PAINT RESISTANCE METER 722–886
Use with 722–860 Paint Probe to measure resistance
of fluid. See Instruction Manual 307–263.
(Not for use in hazardous areas.)
PAINT PROBE 722–860
Use with 722–886 Paint Resistance Meter to measure
resistance of fluid. See Instruction Manual 307–263.
(Not for use in hazardous areas.)


THE GRACO W ARRANTY AND DISCLAIMERS
WARRANTY
Graco
warrants all equipment manufactured by it and bearing its name to be free from defects in material and work -
manship
on the date of sale by an authorized Graco distributor to the original purchaser for use. As purchaser ’ s sole
remedy for breach of this warranty , Graco will, for a period of twelve months from the date of sale, repair or replace
any part of the equipment proven 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 , any malfunction, damage or wear caused by faulty
installation, misapplication, abrasion, corrosion, inadequate or improper maintenance, negligence, accident, tam -
pering,
or substitution of non–Graco component parts. Nor shall Graco be liable for malfunction, damage or wear
caused by the incompatibility with Graco equipment of 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 rea -
sonable
charge, which charges may include the costs of parts, labor and transportation.
DISCLAIMERS AND LIMITATIONS
THE
TERMS OF THIS W ARRANTY CONSTITUTE PURCHASER’S SOLE AND EXCLUSIVE REMEDY AND ARE
IN LIEU OF ANY OTHER W ARRANTIES (EXPRESS OR IMPLIED), INCLUDING W ARRANTY OF MERCHAN -
TABILITY
OR W ARRANTY OF FITNESS FOR A P ARTICULAR PURPOSE, AND OF ANY NON–CONTRACTUAL
LIABILITIES, INCLUDING PRODUCT LIABILITIES, BASED ON NEGLIGENCE OR STRICT LIABILITY . EVER Y
FORM
OF LIABILITY FOR DIRECT , SPECIAL OR CONSEQUENTIAL DAMAGES OR LOSS IS EXPRESSL Y EX -
CLUDED AND DENIED. IN NO CASE SHALL GRACO’S LIABILITY EXCEED THE AMOUNT OF THE PUR-
CHASE
PRICE. ANY ACTION FOR BREACH OF W ARRANTY MUST BE BROUGHT WITHIN TWO (2) YEARS
OF THE DATE OF SALE.
EQUIPMENT NOT COVERED BY GRACO WARRANTY
GRACO MAKES NO W ARRANTY , AND DISCLAIMS ALL IMPLIED W ARRANTIES OF MERCHANT ABILITY AND FITNESS FOR
A P AR TICULAR PURPOSE, WITH RESPECT T O ACCESSORIES, EQUIPMENT , MA TERIALS, OR COMPONENTS SOLD BUT
NOT MANUFACTURED BY GRACO. These items sold, but not manufactured by Graco (such as electric motor,
switches,
hose, etc.) are subject to the warranty , if any , of their manufacturer . Graco will provide purchaser with rea -
sonable
assistance in making any claim for breach of these warranties.
IMPORTANT PHONE NUMBERS
TO PLACE AN ORDER , contact your Graco distributor ,
or call Graco: 1–800–328–0211 T oll Free
FOR TECHNICAL ASSISTANCE ,service repair infor-
mation
or answers about the application of Graco equip -
ment,
call: 1–800–543–0339 T oll Free
Factory Branches: Atlanta, Chicago, Dallas, Detroit, Los Angeles, Mt. Arlington (N.J.)
Subsidiary and Affiliate Companies: Canada; England; Switzerland; France; Germany; Hong Kong; Japan; Korea
GRACO INC. P .O. BOX 1441 MINNEAPOLIS, MN 55440–1441
PRINTED IN U.S.A. 308–055 4–90 Revised 6–92