17
BXB Series
Assembly
Note: Considerable care should be
taken to prevent wedging or jamming of
parts. Never force parts into place. All
parts should drop into place if properly
aligned. During assembly, manually turn
the metering gears to ensure free rotation.
If binding occurs at any time, determine
the cause and correct it immediately. A
small nick, burr, or foreign particle may
cause extensive damage to pump
components.
1) Provide a can of clean oil, preferably
SAE-50 motor oil or mineral oil.
2) Lubricate the dowel and arbor holes
in the Front and Rear Plates. Using
the Driven Gear as a guide, press the
arbor (5) into the Front Side Plate (1).
The thermocouple hole in the arbor
should be facing upwards. Press the
dowels (9) into the rear side plate (3).
3) Place the rear side plate onto a bench
with the dowels and arbor facing up.
4) Lower the gear plate (2) over the
dowels and onto the rear side plate.
Ensure that the correct port location
of the gear and rear plates are
maintained.
5) Gently insert the drive shaft (4), key
(8), and driving gear assembly (6)
into the gear pocket and rear side
plate bearing. Ensure free rotation of
the drive shaft.
6) Carefully insert the driven gear (7)
onto the arbor (5) and lower into the
gear plate. Again, ensure free rotation
of the driving and driven gears.
7) Place the front side plate (1) and arbor
(5) over the end of the drive shaft and
into position over the dowels.
8) Turn the pump onto its side and insert
the binder screws (21).
9) Place the pump into a vice with the
drive shaft facing down. Tighten the
binder screws to 50% of their rated
torque using a crossing pattern. Turn
the drive shaft to ensure free rotation.
If no binding occurs, completely tighten
the binder screws to 100% of their
rated torque. Again, check for free
rotation.
10) Turn the pump over so that the drive
shaft is facing up.
11) Insert new lip seals (31) into the seal
plates (13).
12) Use of a Zenith
®
Lip Seal Installation
Guide is recommended to expand
the ID of the seals prior to sliding the
seals down the drive shaft preventing
seal damage (P/N 15-00131-0026-2).
A piece of tape can also be used
over the keyway located at the end
of the drive shaft. This is to prevent
damage to the seals during assembly.
13) Slide the seal plates (13) and flush
plate (14) over the end of the shaft
and onto the front side plate.
14) Insert the seal plate screws (20) into
the seal plates. Allow the plates to
center themselves around the shaft
before tightening the screws. Torque
the screws to 50% and then 100% of
their rated torque using a crossing
pattern.
15) Remove the tape from the end of the
shaft and insert the key (17).
16) Lubricate the pump by squirting
mineral oil into the inlet port and
rotating the pump shaft until oil
appears at the outlet port.
(15 pages)
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