Graco 220–391 Operation manual

INSTRUCTIONS–P ARTS LIST 307–787
Rev. C
SUPERSEDES B
This manual contains IMPORT ANT
W
ARNINGS AND INSTRUCTIONS
READ AND RET AIN FOR REFERENCE
RESISTOR STUD KIT
Part Number 220–391
For PRO4000E and PRO5000E Air Spray Guns
INSTALLATION
WARNING
Pressure Relief Procedure
To reduce the risk of serious bodily injury , including
splashing in the eyes or on the skin or electric
shock, follow this procedure before installing this
kit.
1. Turn
of f the air and fluid supplies to the gun. On
the PRO4000 Gun, also turn the ES valve lever
to OFF.
2. Trigger the gun into a grounded metal waste
container
to relieve fluid pressure.
3. Open the pump drain valve, having a waste con -
tainer
ready to catch the drainage.
4. Leave the pump drain valve open until you are
ready
to spray again.
1. Follow the Pressure Relief Procedure Warning
above.
2. Remove
the air cap assembly from the gun.
3. T urn the locking pin to the unlocked position
4. Point the front of the gun down, squeeze the gun trig -
ger, and remove the fluid nozzle with the fluid nozzle
wrench,
supplied with the gun.
5. Remove the electrode (A) with the needle wrench,
supplied
with the gun. Hold the nut of the needle shaft
assembly with a small wrench if the needle shaft as-
sembly
turns.
6. Using the resistor stud tool, supplied with the gun, un -
screw
and remove the resistor stud (B) with the o–ring
(C), spring (D), and washer (E). See Fig 1. Discard the
old parts.
Continued on other side.
OLD P ARTS
KEY
AElectrode
BResistor
Stud
CO–Ring
DSpring
EWasher
Fig 1
A
BCDE
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1444
COPYRIGHT 1986, GRACO INC.

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
T
o 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. T ighten the nozzle securely with the
fluid nozzle wrench. T orque the fluid nozzle to 1.1–1.4
N.m (10–12 in-lb).
12. T urn 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 DRA WING
NEW P ARTS
1
253
46
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. P ART 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, V iton) 1
6 183–107 T
OOL, resistor stud 1
Use only GENUINE GRACO P ARTS AND ACCESSORIES.
Viton) is a registered trademark of the Du Pont Company .
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
Factory Branches: Atlanta, Dallas, Detroit, Los Angeles, W est 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