s05mdl1sm-REV0708
Model S05 Metallic Page 23
DIAPHRAGM SERVICING
To service the diaphragm first
shut off the suction, then shut off the
discharge lines to the pump. Shut
off the compressed air supply, bleed
the pressure from the pump, and
disconnect the air supply line from the
pump. Drain any remaining liquid from
the pump.
Step #1:
See the pump composite
repair parts drawing, and the diaphragm
servicing illustration.
Using a 1/2" wrench or socket,
remove 8 capscrews (items 9 & 10),
washers and nuts that fasten the
discharge elbows (item 18) or the
discharge manifold (item 25). Remove
the elbows and manifold assembly
(items 18 & 23) or manifold (item 25).
Use the same procedure to remove
the suction elbows (item 17) or suction
manifold (item 24).
Step #2:
Removing the outer
chambers. Using a 1/2" wrench or
socket, remove the 16 capsrews
(item 10), washers that fasten the outer
chambers (item 14), diaphragms (items
15 & 16) and intermediate bracket (item
4) together.
Step #3:
Removing the diaphragm
assemblies.
Use a 3/4" (19mm) wrench or six
pointed socket to remove the diaphragm
assemblies (outer plate, diaphragm,
and inner plate) from the diaphragm rod
(item 34) by turning counterclockwise.
Insert a 6-32 set screw into the
smaller tapped hole in the inner
diaphragm plate (item 31). Inser t
the protruding stud and the 6-32
fastener loosely into a vise. Use a 3/4"
wrench or socket to remove the outer
diaphragm plate (item 30) by turning
c o u n t e r c l o c k w i s e . I n s p e c t t h e
diaphragm (item 15 & 16) for cuts,
punctures, abrasive wear or chemical
attack. Replace the diaphragms if
necessary.
Step #4:
Installing the diaphragms.
Push the threaded stud of the outer
diaphragm plate through the center
hole of the diaphragm. Thread the inner
plate clockwise onto the stud. Insert
the loose assembly with the above 6-
32 fastener back into the vise. Use a
torque wrench to tighten the diaphragm
assembly together to 7.5 ft. Lbs. (10.17
Newton meters). Allow a minimum of 15
minutes to elapse after torquing, then
re-torque the assembly to compensate
for stress relaxation in the clamped
assembly.
Step #5:
Installing the diaphragm
assemblies to the pump.
Make sure the bumper (item 6) is
installed over the diaphragm rod.
Thread the stud of the one diaphragm
assembly clockwise into the tapped
hole at the end of the diaphragm rod
(item 34) until the inner diaphragm plate
is fl ush to the end of the rod. Insert rod
into pump.
Align the bolt holes in the diaphragm
with the bolt pattern in the intermediate
(item 4).
Fasten the outer chamber (item
14) to the pump, using the capscrews
(item 10) washers.
On the opposite side of the pump,
pull the diaphragm rod out as far
as possible. Make sure the bumper
(item 6) is installed over the diaphragm
rod.
Thread the stud of the remaining
diaphragm assembly clockwise into the
tapped hole at the end of the diaphragm
rod (item 34) as far as possible and still
allow for alignment of the bolt holes in
the diaphragm with the bolt pattern in
the inner chamber. Install diaphragms
with convolutions facing towards center
of pump. See sectional view on previous
page.
Fasten the remaining outer chamber
(item 14) to the pump, using the
capscrews (item 10) and washers.
Step #6:
Re-install the elbow/
manifold assemblies to the pump, using
the capscrews (items 9 and 10) washers
and nuts.
The pump is now ready to be
re-installed, connected and returned to
operation.
OVERLAY DIAPHRAGM SERVICING
The overlay diaphragm (item 16)
is designed to fit snugly over the
exterior of the standard TPE diaphragm
(item 15).
ONE-PIECE BONDED DIAPHRAGM
SERVICING
The one-piece bonded diaphragm
has a threaded stud installed in the
integral plate at the factory. The inner
diaphragm plate has a through hole
instead of a threaded hole.
Read these instructions
completely, before in-
stallation and start-up.
It is the responsibility of
the purchaser to retain
this manual for reference. Failure to
comply with the recommendations stated
in this manual will damage the pump, and
void factory warranty.
IMPORTANT
Place the inner plate over the
diaphragm stud and thread the
first diaphragm/inner plate into the
diaphragm rod only until the inner
plate contacts the rod. Do not tighten.
A small amount of grease may be
applied between the inner plate and the
diaphragm to facilitate assembly.
Inside the fi rst inner chamber push
the pilot plunger pin all the way in,
insert the fi rst diaphragm/rod assembly
into the pump and install the fi rst outer
chamber. Attach a regulated air line
to the air inlet of the pump with the air
pressure turned down to zero. Slowly
begin turning up the air pressure until
the diaphragm assembly completes
one shift, enabling the second outer
chamber to be installed.
Turn the pump over and thread the
second diaphragm/inner plate onto the
diaphragm rod. Turn the diaphragm until
the inner plate contacts the rod and
hand tighten the assembly. Continue
tightening until the bolt holes align with
eight inner chamber holes. DO NOT
LEAVE THE ASSEMBLY LOOSE.
Install the second outer chamber.
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