SANDPIPER M15 Metallic - Manual (Page 24)

m15mdl1sm-rev0713 Model M15 Metallic Page 22
DIAPHRAGM SERVICING
To service the diaphragms 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 assembly
drawing and the diaphragm servicing
illustration.
Using a 1/2” wrench or socket,
remove the 16 capscrews (item 9) that
fasten the manifolds (items 22 & 23) to
the outer chambers (item 14).
Step #2: Removing outer chambers.
Using a 1/2” wrench or socket,
remove the 16 capscrews (item 9), that
fasten the outer chambers (item 13),
diaphragms (item 14) and intermediate
(item 5) together.
Step #3: Removing the diaphragms
and diaphragm plates.
Use a 7/8” wrench or six point
socket to remove the outer diaphragm
plate assemblies, diaphragms (item 16)
and inner diaphragm plates (item 29)
from the diaphragm rod (item 32) by
turning counterclockwise. Inspect
the diaphragm for cuts, punctures,
abrasive wear or chemical attack.
Replace the diaphragms if necessary.
DO NOT USE A WRENCH ON THE
DIAPHRAGM ROD. FLAWS ON THE
SURFACE MAY DAMAGE BEARINGS
AND SEALS.
Step #4: Assembling the diaphragm
and diaphragm plates to the diaphragm
rod.
Push the threaded stud of one outer
diaphragm plate assembly through the
center of one diaphragm and through
one inner diaphragm plate. Install the
diaphragm with the natural bulge facing
away from the diaphragm rod and make
sure the radius on the inner diaphragm
plate is towards the diaphragm, as
indicated on the diaphragm servicing
illustration. Thread the assembly onto
the diaphragm rod, leaving loose.
Step #5: Installing the diaphragm and
rod assembly to the pump.
Make sure the bumper (item 6) is
installed over the diaphragm rod. Insert
rod into pump.
On the opposite side of the pump,
pull the diaphragm rod out as far as
possible. Make sure the second bum-
per is installed over the diaphragm rod.
Push the threaded stud of the other
outer diaphragm plate assembly through
the center of the other diaphragm and
through the other inner diaphragm
plate. Make sure the radius on the inner
diaphragm plate is towards the
diaphragm. Thread the assembly onto
the diaphragm rod. Use a 7/8” wrench
or socket to hold one outer diaphragm
plate. Then, use a torque wrench to
tighten the other outer diaphragm plate
to the diaphragm rod to 500 in. lbs.
(56.5 Newton meters).
Align one diaphragm with the
intermediate and install the outer
chamber to the pump using the 8
capscrews. Tighten the opposite
diaphragm plate until the holes in the
diaphragm align with the holes in the
intermediate. Then, install the other
outer chamber using the 8 capscrews.
Step #6: Reinstall the manifolds to the
pump using the 16 capscrews.
The pump is now ready to be
reinstalled, connected and returned to
operation.
OVERLAY DIAPHRAGM SERVICING
The overlay diaphragm (item 17)
is designed to fit over the exterior of the
standard diaphragm (item 16).
Follow the same procedures
described for the standard diaphragm
for removal and installation, except tight-
en the outer diaphragm plate assembly,
diaphragms and inner diaphragm plate
to the diaphragm rod to 500 in. lbs.
(56.5 Newton meters).
One-Piece Bonded DIAPHRAGM
SERVICING (Bonded PTFE with
integral plate)
The one-piece bonded diaphragm
(item 17) 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.
Place the inner plate over the
diaphragm stud and thread the first
diaphragm / inner plate onto the dia-
phragm 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.
Insert the diaphragm / rod as-
sembly into the pump and install the
outer chamber. 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 the inner
chamber holes. DO NOT LEAVE THE
ASSEMBLY LOOSE.
Read these instructions
completely, before
i n s t a l l a t i o n a n d
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