SANDPIPER S05 Non-Metallic - Manual (Page 25)

520-211-000 2/01 Model S05 Non-Metallic Design Level 1 Page 23
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 composite
repair parts drawing, and the diaphragm
servicing illustration.
Using a ½" wrench or socket, remove
the 16 capscrews (item 10), and flanged
nuts that fasten the elbows (items 17)
to the outer chambers (items 14).
Remove the elbows with the manifolds
and spacers attached.
Step #2: Removing the outer
chambers.
Using a ½" wrench or socket, remove
the 16 capscrews (items 9 and 11), and
flanged nuts that fasten the outer
chambers, diaphragms, and intermediate
(item 4) together.
Step #3: Removing the diaphragm
assemblies.
Use a ¾" (19mm) wrench or six
pointed socket to remove the diaphragm
assemblies (outer plate, diaphragm, and
inner plate) from the diaphragm rod (item
31) by turning counterclockwise.
Insert a 6-32 set screw into the
smaller tapped hole in the inner
diaphragm plate (item 27). Insert the
protruding stud and the 6-32 fastener
loosely into a vise. Use a ¾" wrench or
socket to remove the outer diaphragm
plate (item 26) by turning
counterclockwise. Inspect the
diaphragm (item 15) 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
31) until the inner diaphragm plate is flush
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 (items
9 and 11) and flanged nuts.
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 31) 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 (items 9 and 11) and flanged
nuts.
Step #6: Re-install the elbow/spacer/
manifold assemblies to the pump, using
the capscrews (item 10) and flanged
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).
Follow the same procedures
described for the standard diaphragm for
removal and installation.
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