SERVICE
Displacement Pump Repair
NOTES:
9. Model
1.
A
repair kit is available.
See
or 7.
One
at
a
time, place a male gland
a
UHMWPE v-packing
a
leather v-packing
For the best results, use
all the new parts
in the kit, even if the old ones still look
v-packing
and a female gland
in the
a
UHMWPE v-packing
a
leather
good.
throat of the
housino.
Be sure the
of the
.
v-packings
face
down in
throat.
2.
An asterisk behind a reference number,
for example
indicates that this part is
included in the repair kit.
One
at
a
time.
a
male oland
four leather
Model
'3.
Refer to Fig 1 for displacement pump
v-packings
one
v-packing
and
model 217-527. Refer to Fig
2
for displace-
a
female gland
in the throat of the pump
ment pump model
ing.
Be sure the
lips
of the v-packings face down
in
the throat.
1.
Solvent flush the pump,
if possible. Follow the
the pump
at
the
of its stroke. Then
Pressure Relief Procedure on page
2,
stopping
the air and fluid hoses from the pump.
2.
Screw the intake valve housing out of the pump
valve.
housing
Disassemble and clean the parts of the
MOTE:
If
pump mounting provides enough
clearance,
you
do not have to remove the
entire pump from its mounting. Just follow
step
3.
Otherwise, remove the pump from its
mounting, and clamp
it
in
a
vise before
removing the displacement pump.
3.
Loosen the packing nut
Pull up on the displace-
pin
and remove
it.
Remove the three
tie
rod
rod
far enough to grasp the lower cotter
locknuts
Pull the displacement pump down.
4. Push down on the displacement rod
until the
piston
flats clear the pump housing
Pull the
pump housing.
piston and displacement rod assembly out of the
5.
Unscrew the piston, and remove the ball, washer,
v-packings and glands. If the ball stop pin
or
also
(Model
cotter pins
are worn or broken, remove them,
6.
Remove the packing
cup
Remove the
v-packings and glands from the throat of the pump
housing.
7.
Clean all parts thoroughly, and check for wear,
scratches or other damage. Scoring or irregular
wall of the sleeve
cause premature packing wear
faces on the displacement rod
or polished inner
and leaking. Check these parts by rubbing
a
finger
on the surfaces or by holding the parts up to
a
light
them. Be sure the ball seats of the piston
(3)
and
at an angle. If either is worn or scratched, replace
take valve housing
are not chipped or nicked.
the pump will not leak.
Replace any worn or damaged parts to ensure that
NOTE:
If replacing the sleeve, be sure to install
it
with the tapered end down, and to replace
the gasket
If the old sleeve is hard to
remove, contact your nearest Graco
Branch or Service Depot.
8.
Lubricate all parts with a lightweight grease for
easier assembly.
Model
217-527
. . .. . .
Fig
1
4
307-728
PTFE
