Filter
Top Products
308-017 9
SERVICE
REQUIRED TOOLS
S T
orque wrench
S
Bench vise, with soft jaws
S Hammer
S
Rubber mallet
S 13 mm (1/2”) dia. brass rod
S
O-ring pick
S 11
mm, 12 mm, 19 mm, 22 mm, 26 mm, and 28 mm
open-end
wrenches
S
17 mm box or socket wrench
S
32 mm crow’s-foot wrench
S
400 mm adjustable wrench
S
Set of adjustable wrenches
S
Thread lubricant
S
Anaerobic thread sealant
DISCONNECTING THE DISPLACEMENT PUMP
KEEP HANDS AND FINGERS A
WA
Y FROM
THE
PRIMING PISTON DURING OPERA TION AND
WHENEVER
THE PUMP IS CHARGED WITH AIR
to reduce the risk of injury! On the pump down-
stroke
the priming piston extends beyond the intake
cylinder
to pull the material into the pump. The prim
-
ing
piston works under extreme
force. During opera
-
tion
and whenever the pump is charged with air
, the
priming piston can severely injure or amputate a
hand
or finger
, or
break a tool, caught between it and
the
intake cylinder
. Always follow the
Pressure Re
-
lief Procedure Warning on page 8, before check-
ing,
clearing, cleaning, flushing or
servicing any part
of
the pump.
The air motor piston (located behind the air motor
plates
or shield) also moves when air is supplied to
the motor. NEVER operate the pump with the air
motor plates or shield removed. Before servicing
the pump, follow the Pressure Relief Procedure
Warning
on page 8, to prevent the
pump from start
-
ing
accidentally
.
WARNING
1. Flush
the pump if possible. Stop the pump at the bot
-
tom
of its stroke.
Follow the
Pressure Relief Proce
-
dure
W
arning
on page 8.
2. Disconnect the air hose. Hold the fluid outlet fitting
(8)
with a wrench
to keep it from being loosened while
you disconnect the fluid hose. Remove the pump
from its mounting. Note the relative position of the
pump’s
fluid outlet to the air motor
’
s air inlet.
3. Using an adjustable wrench, unscrew the coupling
nut
(104) from the connecting rod (103). Remove the
coupling
collars (105). See Fig 3.
4. Hold
the tie rod flats with a wrench to keep them from
turning.
Use the wrench provided with the
pump (or a
17
mm box or socket wrench) to unscrew the tie rod
locknuts
(106) from the tie rods (102). Carefully
pull
the
displacement
pump (107) of
f the air motor (101).
5. Refer
to page 10 for displacement pump service. T
o
service
the air motor
, refer to the
separate air motor
manual,
supplied.
RECONNECTING THE DISPLACEMENT PUMP
1. Orient
the pump’
s fluid outlet to the air motor
’
s air in
-
let
as was noted in step 2 under
Disconnecting the
Displacement Pump. Position the displacement
pump
(107) on the tie rods (102). See Fig 3.
NOTE: If
you removed the tie rods (102) from the air
mo
-
tor (101) or air motor adapter plate, reinstall
them
using an 1
1 mm wrench. T
orque
the rods to
20-25 N.m (15-18 ft-lb) on President pumps, and
36-45
N.m (27-33 ft-lb) on all other pumps.
2. Screw
the locknuts
(106) onto the tie rods (102) and
torque to 27-34 N.m (20-25 ft-lb), using the wrench
provided
(or a 17 mm box or socket wrench).
3. Place the coupling nut (104) on the displacement
rod,
then place the coupling collars (105) in the nut.
Screw
the coupling nut onto the connecting rod (103)
loosely. Hold the connecting rod flats
with a wrench
to keep it from turning. With an adjustable wrench,
torque
the coupling nut to 50-61 N.m (37-45 ft-lb).
4. Using a torque wrench in the square hole of the
supplied
wrench (1
10), torque the packing
nut (2) to
45-53 N.m (33-39 ft-lb).
5. Mount
the pump and reconnect all hoses. Reconnect
the
ground wire if it was
disconnected during repair
.
Turn
on the air and run the pump slowly
.
6. Fill the packing nut/wet-cup 1/3 full of Graco Throat
Seal
Liquid or compatible solvent.
Fig 3
101
111
102
103
104
105
107
106
TORQUE
T
O
27-34 N.m
(20-25 ft-lb)
TORQUE TO
20-25 N.m
(15-18 ft-lb)
ON PRESIDENT
PUMPS;
36-45 N.m
(27-33 ft-lb) ON ALL
OTHER PUMPS
TORQUE TO
50-61 N.m
(37-45 ft-lb)
MODEL 222-768
PRESIDENT PUMP
SHOWN
8
2
TORQUE TO
45-53 N.m
(33-39 ft-lb)
0424
110