26 6EM Thru 18GM - 1100 Vertical Turbine Pumps
D. Install the pump's driver top shaft
through the top of the driver and tighten
into the line shaft coupling. Make sure
that the top shaft is centered in the tube.
E. Install the driver coupling and/or
non-reverse ratchet. Install the gib key
(supplied with the driver) into the
driver/shaft keyway. The key should be
a close slip fit in the keyways. It may be
necessary to deburr or file the key to
achieve the proper fit. Never drive or
wedge the key into an overly tight
keyway.
F. Install the top shaft adjusting nut. The
adjusting nut will be used to lift the
shaft/impeller assembly in order to
achieve proper impeller clearance.
Adjusting nut threads are right hand
rotation.
NOTE
Before installation of the nut, the weight
of the shaft/impeller assembly rests on
the bottom of the pump bowls. This
condition makes the shaft almost
impossible to rotate until the nut is
installed and the shaft/impellers are
raised off the bottom of the bowls. In
running position, the shaft, impellers and
hydraulic down thrust are supported by
the driver thrust bearing.
G. Tighten the nut on the shaft until the
impellers are raised very slightly off the
bowl bottoms. This will be evident when
resistance to shaft rotation disappears
as the impellers are lifted off the bottom.
H. With the impellers very slightly off the
bottom, add the additional nut turns
required to achieve the specified
clearance. Determine the correct
impeller setting from the Technical Data
page found in the drawing section of this
manual.
NOTE
Extremely long pumps (deep settings)
may require additional nut adjustment to
accommodate line shaft stretch. Extra
adjustment is not generally required for
pumps less than 150 feet in length. For
pumps over 150 feet long, consult the
factory for instructions.
I. After impeller adjustment, place the
adjusting nut lock screw through the nut
and thread into the driver clutch coupling
and secure. If the nut must be rotated
to align with the clutch coupling hole,
always move to the next higher
adjustment position.
J. Replace the driver cover.
K. Refer to the driver manual to assure that
all lubrication instructions have been
followed completely.
L. Consult the driver manufacturer's
manual to insure that all safety
procedures are completely understood
and implemented prior to operation.
IMPORTANT
Grease lubricated drivers are shipped
pre-lubricated. Oil lubricated drivers and
right angle gears driver are shipped dry
and require an initial fill of the
manufacturer's recommended lubricant
prior to startup. See driver
manufacturer's manual for lubrication
specifications. Initial start-up lubricants
are NOT supplied by the manufacturer.
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