Xylem P81547D Series 90 In-Line Centrifugal Pump - Manual (Page 21)

7. Impeller 14. Shaft sleeve
Figure 2: Size A
1
2
3
4
5
6
7
8
9
10
11
12
13
14
4
1. Shaft 8. Volute
2. Slinger 9. Impeller locknut
3. Bracket coverplate 10. Gauge tapping
4. Volute capscrew 11. Suction
5. Discharge 12. Volute gasket
6. Companion flange 13. Seal assembly
7. Impeller 14. Shaft sleeve
Figure 3: Size AA
2. Measure the diameter of the shaft sleeve in order to determine nominal seal size.
There are three nominal seal sizes:
• 0.50 in. (1.27 cm)
• 0.75 in. (1.91 cm)
• 1.25 in. (3.16 cm)
Remove the seal assembly
1. Remove the motor assembly from the system.
2. Use either a strap wrench or a rag in order to prevent the impeller from turning with
one hand while you loosen the impeller nut with the other hand.
3. For all except the 1.25 in. (3.16 cm) seal assembly, lift the spring retainer and the seal
spring from the shaft.
4. Remove the compression ring from the seal collar by inserting a small screwdriver
underneath the ring and carefully applying an upward force.
Maintenance
20 Series 90 Installation, Operation, and Maintenance Manual