6
practice,
the
valve
discs
and
valve
gasket
should
be
replaced
during
any
routine
maintenance
check
of
the
head
section.
A
once
a
year
routine
procedure
is
recommended.
The
diaphragm
is
secured
by
the
single
screw
in
its
center.
Remove
this
screw
with
an
Allen
wrench.
The
diaphragm
and
its
clamping
plate
should
be
easily
lifted
off.
Some
slight
adherence
to
the
metal
may
occur
if
the
diaphragm
has
been
in
use
for
a
long
period.
To
reattach
diaphragm,
first
insert
the
diaphragm
plate
screw
through
the
Teflon®
washer,
then
through
the
diaphragm
plate,
then
finally
through
the
diaphragm.
Next
apply
a
drop
of
a
medium
strength
thread
locker
(such
as
Loctite®242)
to
the
screw.
Tighten
the
diaphragm
plate
screw
into
the
connecting
rod
bolt.
NOTE:
When
replacing
the
diaphragm,
be
sure
the
four
projecting
studs
of
the
base
casting
are
properly
located
in
the
four
outer
slots
provided
in
the
diaphragm
before
the
part
is
clamped
in
place.
Be
sure
the
diaphragm
plate
is
firmly
fastened
with
its
center
screw.
Failure
to
use
a
thread
locker
may
result
in
the
diaphragm
plate
screw
backing
out,
resulting
in
damage
to
the
pump.
If
a
problem
occurs,
the
pump
may
require
inspection
at
the
ADI
facility.
To
have
your
pump
inspected
and
repaired
at
the
ADI
facility
please
follow
the
instructions
on
the
ADI
website
located
at
http://www.airdimensions.com/service/rma/
.
Disassembly
of
the
Connecting
Rod
Remove
head
assembly
and
service
diaphragm
as
described
in
the
section
above.
Using
a
hex
socket
wrench,
remove
the
hex
head
bolt
on
the
connecting
rod
top
surface.
This
will
release
the
connecting
rod
cap
which
may
then
be
lifted
off.
The
previous
two
steps
should
be
repeated
for
every
head
of
the
pump.
Remove
the
front
plate
(single
head)/second
stage
housing
(double
and
quad
head)
from
the
primary
stage
housing
by
removing
the
four
retaining
screws
using
an
Allen
wrench.
The
connecting
rod
assembly
on
single
head
units,
including
the
counterweight,
is
held
in
place
by
the
counterweight
screw.
This
can
be
loosened
by
an
Allen
wrench.
The
connecting
rod
assembly
may
then
be
slid
off
the
motor
shaft.
On
the
dual
head
units
the
assembly
is
held
in
place
by
the
set
screw.
This
can
be
loosened
by
an
Allen
wrench
and
the
assembly
may
then
be
slid
off
the
motor
shaft.
Due
to
the
complicated
nature
of
the
quad
head
pump
it
is
highly
recommended
that
the
pump
is
shipped
back
to
the
ADI
facility
for
any
connecting
rod
maintenance.
Replacement
of
the
Connecting
Rod
Replace
the
connecting
rod
assembly
on
the
motor
shaft,
taking
care
to
align
set
screw
or
counterweight
screw
as
squarely
as
possible
on
the
flat
of
the
motor
shaft.
Replace
the
connecting
rod
cap
and
connecting
rod
bolt.
Tighten
this
assembly
to
150
in
‐
lbs.
using
a
torque
wrench.
The
torque
specifications
for
this
pump
can
be
found
in
Appendix
A.
