Repair
Reassemble
Reassemble
Reassemble the
the
the Diaphragms
Diaphragms
Diaphragms
Follow
Follow
Follow all
all
all notes
notes
notes in
in
in the
the
the illustrations
illustrations
illustrations on
on
on the
the
the following
following
following
page.
page.
page. These
These
These notes
notes
notes contain
contain
contain important
important
important information.
information.
information.
NOTICE
NOTICE
NOTICE
After reassembly, allow the thread locker to cure
for 12 hours, or per manufacturer’s instructions,
prior to operating the pump. Damage to the pump
will occur if the diaphragm shaft bolt loosens.
TIP:
TIP:
TIP: If you are also repairing or servicing the
center section (drive shaft, piston, etc.), follow
Center Section Repair, page 17
, before replacing
diaphragms.
1.
1.
1.
Clean
Clean
Clean all
all
all parts
parts
parts and
and
and inspect
inspect
inspect for
for
for wear
wear
wear or
or
or damage.
damage.
damage.
Replace
Replace
Replace parts
parts
parts as
as
as needed.
needed.
needed. Be
Be
Be sure
sure
sure the
the
the center
center
center
section
section
section is
is
is clean
clean
clean and
and
and dry.
dry.
dry.
2.
2.
2.
Overmolded
Overmolded
Overmolded Diaphragms
Diaphragms
Diaphragms (PO)
(PO)
(PO)
a.
a.
a.
If
If
If a
a
a diaphragm
diaphragm
diaphragm setscrew
setscrew
setscrew comes
comes
comes loose
loose
loose or
or
or
is
is
is replaced,
replaced,
replaced, apply
apply
apply permanent
permanent
permanent (red)
(red)
(red) thread
thread
thread
locker
locker
locker to
to
to diaphragm
diaphragm
diaphragm side
side
side threads.
threads.
threads. Screw
Screw
Screw into
into
into
diaphragm
diaphragm
diaphragm until
until
until tight.
tight.
tight.
b.
b.
b.
Assemble
Assemble
Assemble the
the
the air
air
air side
side
side plate
plate
plate (11)
(11)
(11) onto
onto
onto the
the
the
diaphragm.
diaphragm.
diaphragm. The
The
The rounded
rounded
rounded side
side
side of
of
of the
the
the plate
plate
plate
must
must
must face
face
face the
the
the diaphragm.
diaphragm.
diaphragm.
c.
c.
c.
Clean
Clean
Clean the
the
the female
female
female threads
threads
threads of
of
of the
the
the piston
piston
piston
shaft
shaft
shaft with
with
with a
a
a wire
wire
wire brush
brush
brush dipped
dipped
dipped in
in
in solvent
solvent
solvent to
to
to
remove
remove
remove any
any
any residual
residual
residual thread
thread
thread locker.
locker.
locker. Apply
Apply
Apply
thread-locking
thread-locking
thread-locking primer
primer
primer and
and
and allow
allow
allow itit
it to
to
to dry.
dry.
dry.
d.
d.
d.
Thoroughly
Thoroughly
Thoroughly clean,
clean,
clean, then
then
then apply
apply
apply
medium-strength
medium-strength
medium-strength (blue)
(blue)
(blue) thread
thread
thread locker
locker
locker
to
to
to the
the
the threads
threads
threads of
of
of the
the
the diaphragm
diaphragm
diaphragm assembly.
assembly.
assembly.
e.
e.
e.
Hold
Hold
Hold a
a
a 5/8
5/8
5/8 in.
in.
in. wrench
wrench
wrench on
on
on the
the
the wrench
wrench
wrench flats
flats
flats of
of
of
the
the
the piston
piston
piston shaft.
shaft.
shaft. Screw
Screw
Screw the
the
the assembly
assembly
assembly into
into
into the
the
the
shaft
shaft
shaft as
as
as tight
tight
tight as
as
as possible
possible
possible by
by
by hand.
hand.
hand.
f.
f.
f.
Move
Move
Move the
the
the piston
piston
piston fully
fully
fully to
to
to one
one
one side
side
side by
by
by
rotating
rotating
rotating the
the
the drive
drive
drive shaft.
shaft.
shaft. On
On
On AC
AC
AC models,
models,
models,
move
move
move the
the
the piston
piston
piston by
by
by hand
hand
hand turning
turning
turning the
the
the
motor
motor
motor fan.
fan.
fan. See
See
See instructions
instructions
instructions in
in
in step
step
step 4
4
4 of
of
of
Disassemble
Disassemble
Disassemble the
the
the Diaphragms
Diaphragms
Diaphragms,,, page
page
page 14
14
14
...
g.
g.
g.
Repeat
Repeat
Repeat to
to
to install
install
install the
the
the other
other
other diaphragm
diaphragm
diaphragm
assembly.
assembly.
assembly.
3.
3.
3.
All
All
All Other
Other
Other Diaphragms-Metal
Diaphragms-Metal
Diaphragms-Metal Pumps
Pumps
Pumps
a.
a.
a.
Thoroughly
Thoroughly
Thoroughly clean
clean
clean or
or
or replace
replace
replace the
the
the diaphragm
diaphragm
diaphragm
bolt
bolt
bolt (14).
(14).
(14). Install
Install
Install the
the
the o-ring
o-ring
o-ring (15).
(15).
(15).
b.
b.
b.
Assemble
Assemble
Assemble the
the
the fluid
fluid
fluid side
side
side plate
plate
plate (10),
(10),
(10), the
the
the
diaphragm
diaphragm
diaphragm (12),
(12),
(12), the
the
the backup
backup
backup diaphragm
diaphragm
diaphragm (13,
(13,
(13,
ifif
if present),
present),
present), and
and
and the
the
the air
air
air side
side
side diaphragm
diaphragm
diaphragm plate
plate
plate
(11)
(11)
(11) on
on
on the
the
the bolt
bolt
bolt exactly
exactly
exactly as
as
as shown.
shown.
shown.
c.
c.
c.
Clean
Clean
Clean the
the
the female
female
female threads
threads
threads of
of
of the
the
the piston
piston
piston
shaft
shaft
shaft with
with
with a
a
a wire
wire
wire brush
brush
brush dipped
dipped
dipped in
in
in solvent
solvent
solvent to
to
to
remove
remove
remove any
any
any residual
residual
residual thread
thread
thread locker.
locker.
locker. Apply
Apply
Apply
thread-locking
thread-locking
thread-locking primer
primer
primer and
and
and allow
allow
allow itit
it to
to
to dry.
dry.
dry.
d.
d.
d.
Apply
Apply
Apply medium-strength
medium-strength
medium-strength (blue)
(blue)
(blue) thread
thread
thread locker
locker
locker
to
to
to the
the
the threads
threads
threads of
of
of the
the
the bolt.
bolt.
bolt.
e.
e.
e.
Hold
Hold
Hold a
a
a 5/8
5/8
5/8 in.
in.
in. wrench
wrench
wrench on
on
on the
the
the wrench
wrench
wrench flats
flats
flats
of
of
of the
the
the piston
piston
piston shaft.
shaft.
shaft. Screw
Screw
Screw the
the
the bolt
bolt
bolt onto
onto
onto the
the
the
shaft
shaft
shaft and
and
and torque
torque
torque to
to
to 60–70
60–70
60–70 ft-lb
ft-lb
ft-lb (81–95
(81–95
(81–95 N•m).
N•m).
N•m).
f.
f.
f.
Move
Move
Move the
the
the piston
piston
piston fully
fully
fully to
to
to one
one
one side
side
side by
by
by
rotating
rotating
rotating the
the
the drive
drive
drive shaft.
shaft.
shaft. On
On
On AC
AC
AC models,
models,
models,
move
move
move the
the
the piston
piston
piston by
by
by hand
hand
hand turning
turning
turning the
the
the
motor
motor
motor fan.
fan.
fan. See
See
See instructions
instructions
instructions in
in
in step
step
step 4
4
4 of
of
of
Disassemble
Disassemble
Disassemble the
the
the Diaphragms
Diaphragms
Diaphragms,,, page
page
page 14
14
14
...
g.
g.
g.
Repeat
Repeat
Repeat to
to
to install
install
install the
the
the other
other
other diaphragm
diaphragm
diaphragm
assembly.
assembly.
assembly.
4.
4.
4.
Attach
Attach
Attach the
the
the fluid
fluid
fluid covers.
covers.
covers. The
The
The arrow
arrow
arrow on
on
on each
each
each fluid
fluid
fluid
cover
cover
cover must
must
must point
point
point toward
toward
toward the
the
the outlet
outlet
outlet manifold.
manifold.
manifold.
Tighten
Tighten
Tighten the
the
the mounting
mounting
mounting clamp
clamp
clamp (5).
(5).
(5).
NOTE:
NOTE:
NOTE: A
A
A food
food
food grade
grade
grade anti-seize
anti-seize
anti-seize lubricant
lubricant
lubricant can
can
can be
be
be
used
used
used on
on
on the
the
the clamp
clamp
clamp threads
threads
threads to
to
to aid
aid
aid assembly.
assembly.
assembly.
5.
5.
5.
Reassemble
Reassemble
Reassemble the
the
the check
check
check valves
valves
valves and
and
and manifolds.
manifolds.
manifolds.
See
See
See
Reassemble
Reassemble
Reassemble the
the
the Check
Check
Check Valves,
Valves,
Valves, page
page
page 12
12
12
...
3A3168R
15
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