Graco 222–687 Operation manual

INSTRUCTIONS-P ARTS LIST 307–961
Rev A
PUMP P ACKING KIT 222–687
For Use In Displacement Pump 222–688
Pressure Relief Procedure
To reduce the risk of serious bodily injury , includ -
ing
fluid injection, splashing fluid or solvent in the
eyes or on the skin, or injury from moving parts or
electric shock, always follow this procedure
whenever you shut off the sprayer, when check-
ing or servicing any part of the spray system,
when installing, cleaning or changing spray tips,
and
whenever you stop spraying.
1. Engage the gun safety latch.
2. Turn the ON/OFF switch to OFF.
3.
Unplug the power supply cord.
4. Disengage the gun safety latch. Hold a metal
part of the gun firmly to the side of a grounded
metal pail, and trigger the gun to relieve pres -
sure.
5.
Engage the gun safety latch.
6. Open the pressure drain valve, having a con -
tainer
ready to catch the drainage. Leave the
valve open until you are ready to spray again.
If you suspect that the spray tip or hose is com-
pletely clogged, or that pressure has not been
fully
relieved after following the steps above, wrap
a rag around the tip guard retaining nut or hose
end
coupling and VER Y SLOWL Y loosen the part
to relieve pressure gradually, then loosen com-
pletely.
Now clear the tip or hose.
WARNING
1. Flush the pump, if possible. Follow the Pressure
Relief
Procedure W arning , above.
2. Disassemble the pump. Clean and inspect all
parts for wear or damage and replace parts as
needed.
Coat the rod and the inside of the cylin -
der
with oil before reassembling.
NOTE: All sprayers with DC/Brush-T ype Motors:
When replacing the pump packings, also in -
spect the motor brushes and replace them,
if necessary.
3. Stack the backup washer (19), seal (5), female
gland (20), packings (17) and male gland (13)
onto
the piston valve (24). T ighten the nut (B) onto
the valve to 10.5 in–lb (1.2 N.m) to seat the pack -
ings,
and then back of f and tighten finger tight.
Note the alignment of the piston valve (D) to the
nut (B) and maintain this alignment through Steps
3, 4 and 5. This helps ensure that the nut (B) does
not overcompress and swell the packings, which
can cause them to be damaged when the piston
assembly is installed in the cylinder .
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1444
COPYRIGHT 1989, GRACO INC.
This manual contains IMPORTANT
INSTRUCTIONS and WARNINGS.
READ AND RETAIN FOR REFERENCE.
LIPS OF
V–PACKING IN
THROAT MUST
FACE DOWN
DETAIL OF
THROA T P ACKINGS
DET
AIL OF
PISTON PACKINGS
Fig 1
B
F
18
17 POLY
H
13
5
U-CUP SEAL
LIPS FACE DOWN
19
D
6
4
J
7
3
E
G
12
11
20
ROD
PACKING
NUT
JAM NUT
FEMALE
GLAND
MALE
GLAND
SMALL BALL
CYLINDER
PISTON NUT
MALE GLAND
BACKUP WASHER
GASKET
BALL GUIDE
LARGE BALL
PIN
PISTON
VALVE
FEMALE
GLAND
INTAKE VALVE
LIPS OF
V–PACKING IN
THROAT MUST
FACE DOWN
POLY
LIPS OF
V–PACKING IN
PISTON MUST
FACE UP
LIPS OF
V–PACKING IN
PISTON MUST
FACE UP
K
L
PLUG

4. Apply one drop of adhesive, supplied, on the
threads
of the piston valve. Place the small ball (3)
on the piston valve (D). Hand tighten the valve
into
the rod (E) just until the nut contacts the rod.
Place the flats of the rod in a vise .
5. Tighten the piston nut (B) onto the piston rod (E)
to 19 ft–lb (25 N.m). Use two wrenches to main-
tain the alignment as mentioned in Step 3, page
1.
6. Stack
the male gland (1 1), packings (18) and fe -
male gland (12), one at a time into the top of the
cylinder (H). Install the packing nut (G) and plug
(L). Leave the packing nut loose for now .
7. Insert the piston rod (23) through the bottom of the
oiled pump cylinder .
8. Assemble
the intake valve (J) with a new gasket
(6), the large ball (4), ball guide (K), and pin (7).
Screw
the assembly into the pump cylinder . T ight-
en
to 80 ft-lb (109 N.m)
9. Install the jam nut (F) on the cylinder , if it was re -
moved. Connect
the pump to the sprayer as de -
scribed in your separate pump instruction
manual.
10. Tighten the packing nut (G) just enough to stop
leakage, but no tighter. Fill the wet–cup/packing
nut
1/3 full with Graco TSL.
PARTS LIST
Repair Kit 222–687
REF NO. P ART NO. DESCRIPTION QTY
3 105–444
BALL, sst; 0.3125” 1
4 105–445 BALL,
sst; 0.50” 1
5 108–995 SEAL,
u–cup 1
6 176–761 GASKET
, copper 1
7 176–759 PIN,
ball stop 1
11 183–556 GLAND,
male, 1
12 183–237 GLAND,
female, brass 1
13 183–236 GLAND,
male, brass 1
17 176–882 V–PACKING, polyethylene 5
18 176–997 V–PACKING,
polyethylene 5
19 183–557 WASHER, backup 1
20 183–558 GLAND,
packing, female 1
25 ADHESIVE 1
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. 307–961 2–89
LIPS OF
V–PACKING IN
THROAT MUST
FACE DOWN
DETAIL OF
THROA T P ACKINGS
DET
AIL OF
PISTON PACKINGS
Fig 2
B
F
18
17 POLY
H
13
5
U-CUP SEAL
LIPS FACE DOWN
19
D
6
K
4
J
7
3
E
G
12
11
20
ROD
PACKING
NUT
JAM NUT
FEMALE
GLAND
MALE
GLAND
SMALL BALL
CYLINDER
PISTON NUT
MALE GLAND
BACKUP WASHER
GASKET
BALL GUIDE
LARGE BALL
PIN
PISTON
VALVE
FEMALE
GLAND
INTAKE VALVE
LIPS OF
V–PACKING IN
THROAT MUST
FACE DOWN
POLY
LIPS OF
V–PACKING IN
PISTON MUST
FACE UP
LIPS OF
V–PACKING IN
PISTON MUST
FACE UP
L
PLUG