6EM Thru 18GM - 1100 Vertical Turbine Pumps 43
the end of this section) driver drive
the impeller off the collet.
2. To remove the collet insert a screw
driver in the collet slit and wedge
apart; the collet will slide off of the
shaft.
3. If impellers are to be reused, they
should be marked so that they are re-
installed in the same bowl.
H. Unscrew the next intermediate bowl (36).
Remove the intermediate bowl from the
pump shaft and set aside for inspection.
I. Repeat steps G & H until all bowls and
impellers have been removed.
J. Remove the shaft from the suction bell
(40), or suction case.
K. Measure and record the location of the
sand collar (58). Remove the sand collar
only if it is damaged and replacement is
required.
L. The pump bowl assembly is now
disassembled and ready for inspection.
M. This pump may be fitted with wear rings
by machining the bowls (or impellers) for
a ring seat. Refer to Wear Rings section
of this manual for instructions on adding
wear rings or replacing existing rings.
Inspection for Replacement
After the components are disassembled,
each part should be thoroughly cleaned and
inspected for wear and physical damage.
During cleaning, do not allow any
petroleum-based solvents on rubber
bearings.
It is not necessary to remove bearings
unless inspection indicates replacement is
necessary. If it is necessary to remove
bearings, they should be pressed from their
seats and discarded.
CAUTION
Use care not to damage bores or hubs
during bearing removal.
Any parts showing signs of excessive wear
or damage should be replaced with genuine
Layne/Verti-Line parts. Maximum
clearances are shown on the technical data
page found in the drawing section of this
manual.
A. Inspect the shafting (23) at each bearing
location for damage or excessive wear
and replace shaft if not salvageable.
B. Inspect all line shaft bearings (26),
packing box bushing (17A), and all bowl
bearings (34, 35, 41, 50) for wear and
excessive clearance. If the diametrical
bearing clearance exceeds the limits, the
bearings must be replaced.
C. Inspect the bowl and/or impeller wear
ring (if so equipped) for wear and
excessive clearance. The correct
clearance is shown on the technical data
page in the drawing section of this
manual. The ring should be replaced
with a genuine Layne/Verti-Line
replacement part.
D. Inspect the shaft sleeves for wear.
Replace as necessary. If the sleeves (13
& 29) show wear or damage, remove the
sleeve(s) by heating it to 350
°
-400
°
F to
break the Loctite bond.
CAUTION
If it is found that any of the bearings or
sleeves have excessive wear, it is
recommended that all bearings and
sleeves be replaced (including bowl
bearings).
CAUTION
Measure and record the position of the
sleeve (13) on the shaft (19) before
removal.
WARNING
To prevent possible serious personal
injury, heat resistant gloves must be
worn when handling heated parts.
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