Xylem IMVS R01 Model VS Vertical Industrial Turbine Pumps - Manual (Page 10)

10
4. BOWL DISASSEMBLY
The bowl assembly shown in Figure 2 is composed of
a discharge bowl (for the model with built-in check
valve, it would be column adapter), intermediate
bowl, impellers with taper collects, motor adapter,
bearings and pump shaft.
A. Begin disassembly by removing the capscrews that
secure the top stage intermediate bowl and the sec-
ond stage intermediate bowl and slide the discharge
and top intermediate bowls off the pump shaft
together. Remove the thrust washer.
B. Pull shaft out as far as possible and strike impeller
hub utilizing a taperlock driver or equivalent sliding
along the pump shaft to drive the impeller off the
taperlock. See Figure 3.
Figure 3 – Disassemble the Impeller
C. After impeller is freed, insert a screwdriver into the
taperlock to spread it. Slide taperlock and impeller
off the pump shaft.
D. Use the preceding procedures until entire turbine
bowl assembly is completely disassembled.
5. TURBINE BOWL – WEAR RINGS REMOVAL
(OPTIONAL)
A. Utilizing a diamond point chisel, cut two V-shape
grooves on the bowl wear ring, approximately 180º
apart. Use extreme care not to damage the wear
ring seat.
B. With a chisel or equal, knock the end of half of the
ring in and pry the ring out.
C. On special materials such as chrome steel, set up the
bowl in a lathe and machine the wear ring off. Use
extreme care not to machine or damage the ring
seat.
6. TURBINE BOWL – IMPELLER WEAR RING
REMOVAL (OPTIONAL)
Set up impeller in a lathe and machine wear ring out.
Use extreme care not to machine or damage ring seat
or impeller hub. Impeller wear ring may also be re-
moved by following steps A and B, paragraph #5.
7. BOWL BEARING REMOVAL
Utilizing an arbor press and a piece of pipe or sleeve
with outside diameter slightly smaller than the bowl
bearing diameter, press the bearing out.
8. INSPECTION AND REPLACEMENT
A. Clean all parts thoroughly with a suitable cleaner.
B. Check bearing seats for deformation and wear.
C. Check pump shaft for straightness and excessive
wear on bearing surfaces. Check straightness of the
pump shaft. The straightness should within 0.0005"/
ft. TIR.
D. Visually check impellers and bowls for cracks and
pitting. Check all bowl bearings for excessive wear
and corrosion.
9. TURBINE BOWL AND IMPELLER WEAR RING
INSTALLATION (OPTIONAL)
Place chamfered face of bowl or impeller wear ring
towards the ring seat and press. Use an arbor press or
equal. Make sure ring is flush with edge of wear ring
seat.
10. BOWL BEARING INSTALLATION
Press the bearing into all the bowls by using an arbor
press or equivalent. Press the bearing in from the
bottom end of the hub until the bottom end of the
bearing is flush with the bottom end of the hub.
11. TURBINE BOWL WITH TAPERLOCK –
REASSEMBLY
A. Secure the submersible assembly jig to the motor
end of the motor adapter. See Figure 4. Be sure
to use the proper jig for the motor frame size the
bowl assembly is intended to adapt to.
B. Put some grease in the suction bearing of the
motor adapter. Slide the shaft through the bear-
ing. Secure the shaft in place by locking the shaft
to the assembly jig with a special long bolt or all
thread and a hex nut. See Figure 4.
Figure 4 – Assembly Jig
C. Slip impeller over the shaft. Then slip taperlock
over the shaft with smaller end towards impeller.
A screwdriver can be used to spread the taperlock
for ease in slipping over the shaft.