27
2005 Doctor Martin Luther King Jr Street
Indianapolis, IN 46202
Rev 07-2021
INSTALLING THE VERTICAL HOLLOW SHAFT (VHS) MOTOR
On pumps with two-
piece top shafts, the top shaft
should not be installed yet.
The head shaft threads and
face should be checked for
any nicks or burrs. If any are
found, correct them with the
use of a mill file. Fig. 19
shows a typical motor; refer
to manufacturer instructions
for proper dimensions and
installation. These instruct-
tions are offered as guidelines
only.
Clean the coupling
threads with a wire brush and
solvent. Coat the threads and
face of the coupling with
anti-seize compound.
Screw the coupling on
until its center hole is in line
with the face of the head
shaft. Cover the coupling top
opening with plastic or a
clean rag to prevent the entry
of any foreign material into
the coupling while the motor
is being lowered into
position.
If the pump is
constructed with a one-piece top
shaft, care must be taken when
lowering the motor onto the
discharge head, to prevent it from
bumping against the top shaft
protruding above the discharge head.
Any contact of the motor with the one-
piece top shaft could result in bending of
the shaft.
Figure 19. Typical motor construction; refer to assembly
drawing and information provided by the motor
manufacturer for details on your particular motor.
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