Disassembly And Assembly - EBARA FSA Instruction Manual

Disassembly and Assembly

All Service should be done by factory trained or qualified personnel only.
Be sure to cut off power source before beginning disassembly.
1. Disassembly
When disassembling pump, have a piece of
cardboard or plywood ready to place the parts
on as you work. Do not pile parts on top of each
other. They should be laid out neatly in rows the
"O" ring and gasket cannot be used again once
they are removed. Have replacement parts
ready.
Disassemble In the following order, referring to
the sectional view.
Be sure to cut off power source before
beginning disassembly.
(1) Drain all water from casing.
(2) Remove the motor from the common base.
Inspect shaft coupling rubber and replace if
excessively worn.
(3) Remove the casing cover bolts, and remove
casing cover and shaft bearing frame from
casing. You will now be able to inspect the
inside of the pump. Check for wear and other
abnormal signs. Replace casing ring when
wear approaches 1 mm.
(4) Remove impeller nut (right hand thread) and
impeller washer (some models do not have
one), and remove impeller from casing. If the
impeller is rusted and will not come loose, tap
its end lightly with a wooden hammer to
release.
(5) Remove the impeller key from the main shaft
(some models do not have a key), the casing
cover from the shaft bearing frame, and the
deflector from the main shaft.
Mechanical seal type: At this point in
disassembly,
mechanical seal is attached to the casing cover
and the rotating portion to the main shaft. The
fixed portion of the mechanical seal can be
removed by pushing it out of the shaft hole in
the casing cover with a screw driver of similar
tool.
Gland packing type: Remove the packing
gland from the casing cover and take out the
packing and lantern ring bushing (some models
do not have a lantern ring bushing).
(6) Remove the shaft bearing cover from the shaft-
bearing frame and take out the main shaft.
Inspect condition of the shaft bearing and
replace if it does not rotate smoothly.
the fixed portion of
CAUTION
2. Assembly
Re-assemble in reverse order of disassembly.
Re-assemble of following points.
(1) Gland packing type: Replace gland packing
with new packing, shifting joints 180° until
last joint is on the bottom.
Mechanical seal type: Wipe contacting part of
mechanical seal with a dry cloth.
(2) Replace "O" ring with a new one.
(3) Replace all parts that are excessively worn or
damaged.
(4) Tighten all bolts evenly.
Please obtain "O" rings, gland packing and
other parts from pump dealer. The table of
dimensions is given in "Maintenance".
the
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