Xylem IM158 R04 Model SMVT - Manual (Page 33)

SMVT Installation, Operation and Maintenance Manual 31
Maintenance (continued)
15. Install a new o-ring on the lower suction cover of the replacement cartridge stack.
16. Remove the old o-ring on the upper flange of the pump casing and discard. Install a new
o-ring on the upper flange of the pump casing.
17. With an adequately sized crane carefully lift the replacement stack. Lift from the motor
adapter as shown on page 7 of this manual. The motor adapter, seal plate, pump shaft,
and cartridge stack will lift as a complete unit.
18. Carefully lower the replacement stack approximately halfway into the pump casing. Align
the motor adapter windows to the desired orientation.
19. VERY slowly and carefully continue to lower the replacement stack into the pump casing.
As the seal plate approaches the upper flange of the pump casing, take care to align the
bolt circles of the pump casing and seal plate.
20. Smoothly guide the replacement stack so that the lower suction cover engages the
pump body. Be careful to avoid damaging the lower o-ring, as this will affect the pump
performance.
21. Install the (12) upper casing bolts ‘finger-tight’.
22. Torque the (12) upper casing bolts in the pattern shown in Figure 28. See the
“Engineering Data” section on page 8 of this manual for the proper torque value.
Figure 28: Upper Casing Bolts Torque Pattern
23. Lubricate the inside of the mechanical seal assembly (supplied with pump) with grease
(such as Armored AutoGroup “STP” or Dow Corning “111 Grease”) or a mixture of
equal parts non-petroleum hand soap and water. Be sure that there is an o-ring at the
back of the gland flange.
24. Take care to make sure that the pump shaft is clean; it should be free of all burrs, oil, and
grease. Pump shaft should be completely dry before moving on to the next step.
25. To install the mechanical seal assembly, carefully slide it down the pump shaft until the
gland contacts the mounting surface on the top of the seal housing.
26. Install the (4) hex cap screws on the seal gland to the seal housing. See the “Engineering
Data” section on page 8 of this manual for the proper torque value.
27. With an adequately sized crane carefully lower the motor assembly onto the motor
adapter located on the top of the pump. Allow the motor shaft to engage into the
coupling. Be careful not to damage the motor shaft.
28. Secure the motor to the motor adapter with the (4) hex head bolts removed in step 6 of
this section. See the “Engineering Data” section on page 8 of this manual for the proper
torque value.
29. 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.