44
DISASSEMBLY-ASSEMBLY DIAPHRAGMS
SANDPUMPER II
1.
CHANGING THE DIAPHRAGMS:
a.
Measure the gap between flanges.
b.
Remove the cover from the top of the pump.
c.
Start engine-turn on toggle switch-open the pump speed
control-let the actuator rod shift fully to the side of the
pump you will be servicing first-close the pump speed
control shut off the toggle switch and the engine.
d.
Remove all the bolts from around the flanges and the 2 nuts
on the check ball assembly flange.
e.
Remove the flanged diaphragm chamber.
f.
Peel back the diaphragm-insert a 1” wrench behind the
diaphragm-put the wrench on the flats that are machined on
cylinder rod.
CAUTION
:
If you use a pliers or any kind of
clamping device on the cylinder rods, the rod seals will be
destroyed when the pump shifts.
g.
While holding the 1” wrench on the cylinder rod,
put a 1-1/8” wrench to the bolt head that is welded to the
outer support plate. Turn counter-clockwise to loosen-
remove completely from cylinder rod.
h.
Remove the inner support plate from the diaphragm.
i.
Discard the diaphragm.
j.
Scrape any dried material from the support plates.
k.
The new diaphragm #112 is marked “
LIQUID SIDE-THIS SIDE
OUT
” this faces the chamber you took off. Take the outer
support plate and insert the bolt through the hole in the
diaphragm. The raised head on the diaphragm will fit into
the groove of the support plate. Take the inner support
Summary of Contents for SP 300
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Page 27: ...25 HYDRAULIC FLOW CHART ...
Page 41: ...39 SQUEEGEE SP300 DUAL SPRAY SANDPUMPER II SANDPUMPER II ...