INSTALLATION
WARNING
To reduce the risk of sparking, which could cause
fire or explosion, DO NOT use the old electrode or
stud with the new kit parts. The old electrode and
stud are white. The electrode and stud in the kit are
black. BE SURE the electrode and stud you install
are black.
7.
Install the new o–ring (5) on the new resistor stud (2),
in the groove right below the stud flange. See the
Parts Drawing, below. Lubricate the o–ring with petro-
leum jelly, being careful not to get any lubricant on the
stud threads.
8.
Install the new washer (3) in the gun barrel.
9.
Using the resistor stud tool (6), supplied with the kit,
install the resistor stud (2) in the front of the gun barrel.
Tighten until snug.
10. Install the new electrode (1) with the needle wrench (4)
supplied with the kit.
CAUTION
To avoid damaging the plastic threads, be very
careful when installing the electrode.
11. Squeeze the gun trigger and screw the fluid nozzle
back into the gun. Tighten the nozzle securely with the
fluid nozzle wrench. Torque the fluid nozzle to 1.1–1.4
N.m (10–12 in-lb).
12. Turn the locking pin to the locked position.
13. Install the air cap assembly carefully, to avoid bending
the electrode wire. Tighten the retaining nut so it is
snug, allowing the air cap to turn with resistance. If the
retaining nut is too tight, the spray pattern will be
distorted.
14. Test the gun resistance as instructed in your gun
manual; Manual 307–638 for the PRO4000 Gun,
Manual 307–712 for the PRO5000 Gun.
PARTS DRAWING
NEW PARTS
1
2
5
3
4
6
WARNING
When servicing use only identical Graco replace-
ment parts. Use of other parts could alter
the grounding continuity of the gun and result in
fire or explosion, causing serious bodily injury
and property damage.
PARTS LIST
Part Number 220–391
Includes items 1 to 6
REF
NO.
PART NO.
DESCRIPTION
QTY
1
181–824
ELECTRODE (color coded black) 1
2
220–923
STUD, resistor (color coded
black)
1
3
181–825
WASHER
1
4
181–826
WRENCH, needle
1
5
105–667
O–RING, Viton)
1
6
183–107
TOOL, resistor stud
1
Use only GENUINE GRACO PARTS AND ACCESSORIES.
Viton
)
is a registered trademark of the Du Pont Company.
HOW TO ORDER REPLACEMENT PARTS
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
Factory Branches: Atlanta, Dallas, Detroit, Los Angeles, West Caldwell (N.J.)
Subsidiary and Affiliate Companies: Canada; England; Switzerland; France; Germany; Hong Kong; Japan
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1444
PRINTED IN U.S.A. 307–787 2–86 Revised 2–88
