Xylem IM158 R04 Model SMVT - Manual (Page 29)

SMVT Installation, Operation and Maintenance Manual 27
21. Tighten the set screws on the seal gland. See the “Engineering Data” section on page 8 of
this manual for the proper torque value.
22. Install the (2) coupling guards.
23. Follow the instructions in “Section V. Commissioning, Startup, Operation, and
Shutdown” for the proper procedures to restart the pump.
Motor Replacement
1. Remove the (2) coupling guards.
2. Loosen the set screws on the seal gland.
3. Disassemble the coupling by removing the (6) socket head screws. Remove the dowel pin
on the pump shaft. See Figure 21. Retain bolts and dowel pin for reassembly.
Figure 21: Motor Coupling
Item Quantity Description
A 2 Coupling Half
B 6 Socket Head Cap Screw
C 6 Lock-washer
D 1 Dowel Pin
4. Remove the (4) hex head bolts the join the motor and motor adapter. Retain bolts for
reassembly.
5. With an adequately sized crane carefully remove the motor assembly.
6. With an adequately sized crane carefully lower the new motor assembly onto the motor
adapter located on the top of the pump.
7. Secure the motor with the (4) hex head bolts. See the “Engineering Data” section on page
8 of this manual for the proper torque value.
8. Take care to make sure that the pump and motor shafts are clean; they should be free
of all burrs, oil, and grease. Both the pump and motor shafts should be completely dry
before moving on to the next step.
9. Install the dowel pin on the pump shaft and loosely assemble the shaft coupling. Do not
tighten the coupling at this point; it should be left loose enough to receive the motor
shaft in the following section.
10. Insert the impeller shim (supplied with the pump) between the shaft coupling and seal
gland. This will lift the shaft/impellers to the running position.
11. Very lightly tighten the (2) socket head cap screws on the pump end of the coupling (refer
to Figure 22). Tighten the coupling evenly; ensure that the coupling is symmetrical on
both the pump and motor shafts. Do NOT torque the cap screws in this step.
Maintenance (continued)