8
Lapping or
Blocking
To remove nicks, burrs and scour marks
from pump parts, place two layers of
400-Grit Emery Cloth on a lapping block
or plate. A granite flat is also suitable.
Apply light pressure to the part and turn
it using a figure 8 motion approximately
ten times until a smooth finish appears.
Areas that are commonly lapped are the
sides of metering gears and the inside
faces of front, gear and rear plates. After
lapping is completed the parts are ready
to be cleaned with a safe industrial solvent.
Always use clean, lint free rags and
compressed air to clean components.
Paper towels are not acceptable
because they can leave small pieces of
paper and dust on the pump parts.
Use chemical brushes to clean between
gear teeth, bores and reliefs. After all
components are “hospital clean”, the
pump can be reassembled.
If cleaned parts are not to be
reassembled for a period of time, they
should be coated with a rust preventative
fluid, such as mineral oil, to prevent
rusting.
New and replacement parts should
always be deburred and cleaned using
the above procedures.
B-9000 Series
Disassembly
Note:
As parts are disassembled, place
them carefully on a clean surface such
as a soft cloth. Do not allow them to
knock together. Pay close attention to the
order in which parts are removed. This
will aid in the reassembly of the pump.
Instructions below assume the pump
has been removed from the system, for
example, magnetically driven pumps
with adapter plates have been disen-
gaged from the housings.
Caution:
Please review the precautions
listed on Page 4 for Magnetically
Coupled Pumps.
1.
Remove the square key (17).
For Magnetically Coupled Pumps
skip to step 3d.
2
.
For mechanical face seal and double
lip seal pumps, remove the socket
head screws (18) from the seal
housing (11). For packing seal
pumps, remove the hex head
screws (15) from the packing gland
(14), then lift off the packing gland.
3.
Lift off the seal housing (11) and
remove the seal.
a) Mechanical Face Seal Pumps:
• The ceramic seat may be removed
from the housing by pushing it out
with finger pressure. If it is stuck,
use two small Allen keys or other
small pins to press the seat from
the housing using the two access
holes on the housing face.
• Remove the o-ring (15) from the
recessed area in the seal housing
(
NOTE:
.05 through 2.4 cc/rev
models do not have the o-ring).
• On the .05 through 2.4 cc/rev
models, set screws will have to be
removed to allow removal of the
mechanical seal (13) from the drive
shaft (2). On models larger than 2.4
cc/rev, first remove the carbon seal
face from the seal, then pull the
mechanical seal (13) from the drive
shaft (2). Some materials of the
seal (face) are brittle in nature, use
extreme caution so as not to dam-
age the seal or its components.
b) Double Lip Seal Pumps:
• Press the lip seal (51) from the seal
housing using finger pressure, or
by pressing on the seal using a
plastic tool.
c) Packing Seal Pumps:
• Remove the packing seal rings (13)
from the Inside of the seal housing
(11).
• Remove the collar plate (12) from
the drive shaft (2).
d) Magnetically Coupled Pumps:
• If applicable, remove the screws
that secure the barrier cap to the
adapter plate. Remove the barrier
cap and its O-Ring.
NOTE:
There
could be process fluid contained in
the barrier cap.
• Loosen setscrew at the bottom of
the inner rotor with appropriate
Allen wrench.
NOTE:
Beware of
strong magnetic forces. Slide the
inner rotor off the shaft.
• Remove the square key from the
pump shaft.
• Remove the four socket head
screws/washers that are securing
