Specifications

16
BXB Series
Disassembly
Refer to Diagram 4 on page 11.
Note: As parts are disassembled, place
them carefully on a clean surface such
as a soft cloth. Do not allow them to
knock together.
1) Remove the Key (17) from the end of
the Drive Shaft.
2) Remove the Seal Plate Screws (20).
3) Slide the Seal Plates (13) and Flush
Plate (14) over the end of the shaft.
4) Pry the Lip Seals (31) from the Seal
Plates and discard. It is recommended
that the Lip Seals be replaced anytime
the pump is taken apart.
5) Remove the Dowels (9) and Arbor (5)
and press in the direction which dis-
engages the press fit in the shortest
distance. Note: Dowels are press fit
in the Rear Side Plate and slip fit in
the Front and Gear Plates. The arbor
is press fit in the Front Plate and slip
fit in the Gear and Rear Plates.
6) Place the pump in a vise with the
ports facing upward. Note: Never
clamp the pump on lapped surfaces.
Loosen the four Binder Screws (21)
and remove two Diagonal Screws.
Back out the remaining two screws
until only two or three threads are
engaged.
7) Remove the pump from the vise and
lay it on its side.
8) Separate the Front Side Plate (1),
Gear Plate (2), and Rear Side Plate
(3) by gently tapping the engaged
Binder Screws with a plastic hammer.
Some process fluids make disassembly
difficult and therefore a soft-face
hammer may be used.
9) After the plates are apart, completely
remove the two remaining Binder
Screws. Separate the plates by gently
tapping them with a soft-head dead
blow hammer. Note: Do not attempt
to pry the plates apart or damage to
lapped surfaces may occur.
10) Carefully remove the Drive Shaft (4),
Key (8), and Driving Gear Assembly
(6) from the Gear Plate (2). Next,
remove the Driven Gear (7).
11) After all components are thoroughly
cleaned, inspected, or replaced, the
pump may be reassembled. Note: If
the Drive Shaft Bearings (49, 50) are
replaced, they must be honed to the
proper inner diameters after being
pressed into the Front (1) and Rear
(3) Plates. Contact Zenith
®
for details.