6EM Thru 18GM - 1100 Vertical Turbine Pumps 21
10. Install the top tube tension nut over the
projecting line shaft and slide into
position in the discharge head.
Remembering that the tension nut
threads are left handed, thread it into the
top enclosing tube. The threads should
engage the tube smoothly and allow the
washer and nut to seat squarely in the
counterbore of the discharge head.
Torque the top tube tension nut (refer to
the technical data page for correct
torque values).
Water Flush Enclosed Line Shaft
Flanged Column
1. Using an appropriate hoisting system, lift
the pre-assembled bowl assembly and
position it above the well. Lower the
bowl assembly partially into the well and
attach a pipe clamp (see Figure #1) to
the upper most bowl directly under the
bowl discharge flange. Lower the
assembly, allowing it to be suspended on
the foundation via the pipe clamp.
2. Before proceeding with assembly, lay out
all line shaft, enclosing tube, column and
connectors. Inspect and identify all
items and arrange them in the order in
which they will be assembled. Oversized
diameter enclosing tube sections (if
used) must be installed at the bottom of
the assembly, directly above the pump
discharge bowl. When oversized tube
sections are used, special stepped
connector bearings are provided in order
to adapt them to the remaining standard
diameter enclosing tube sections.
Pre-assemble matching sets of shaft,
enclosing tube and column by sliding
them inside each other and attaching
connectors and couplings. This will allow
each set of column/enclosing tube/shaft
to be hoisted into place and assembled.
Non-standard lengths of column,
enclosing tube and line shafting must be
assembled at the top of the pump as
previously outlined.
3. Lower the shaft/tube/column assembly
into position. A line shaft coupling is to
already be in place on the pump shaft.
Assure that the threaded shafts and
coupling are clean and free of burrs.
Lubricate threads with light oil. Thread
the shafts into the coupling so that both
shafts engage the coupling equally. The
shafts should butt together solidly in the
center of the coupling. Threads should
be exposed on both ends of the
coupling. Assure that no foreign matter
exists between the shaft ends. Such a
condition will cause shaft misalignment
and will result in vibration and
accelerated bearing wear.
IMPORTANT
Line shaft threads and enclosing tube
threads are left hand rotation. Tighten
shafts, enclosing tubes and couplings
securely with pipe wrenches.
4. Assure that all enclosing tube threads
and connector bearing threads are clean
and free of burrs. Coat connector
bearing threads with a sealant such as
Loctite PST #567, Permatex No. 2
non-hardening gasket sealant prior to
assembly. Silicone sealants are also
permissible. This step is very important
in preventing entry of the pressurized
pumped media into the enclosing tube.
Thread the enclosing tube onto the
connector bearing and secure with chain
wrenches.
5. Clean all coating or foreign materials
from the column flange faces prior to
assembly. Lower the shaft/tube/column
assembly into position and coat the
flange faces with sealant. Assure that
the flange faces engage squarely and
that all bolt holes align. Install bolts and
nuts and tighten.
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