Xylem P81630E Series VSC and VSCS Base Mounted Centrifugal Pumps - Manual (Page 11)

11
SPECIAL INSTRUCTIONS FOR PUMPS (VSCS-PF) 10 x 12 x 17 and 12 x 14 x 12 1 /
2
TO REPLACE THE PACKING:
4. Remove flush tube and tube fitting from inside bearing
bracket.
5. Remove bearing bracket capscrews and bearing cover
capscrews inside the bracket.
6. Remove bearing bracket using capscrews in jackscrew
holes. DO NOT PULL BEARING COVER.
7. Remove bearing locknut by straightening tab of lockwash-
er from notch in locknut and turning locknut counterclock-
wise.
8. Remove lockwasher and pull bearing from shaft.
9. Remove retainer ring from shaft.
10. Remove bearing cover.
11. Remove packing gland capscrews and packing gland.
12. Using a packing puller, remove packing rings and lantern
ring.
13. Remove and replace the shaft sleeve. Apply anti-seize
compound only to the area of the shaft that will be under
the sleeve. Install new sleeve on shaft. Position sleeve
drive collar outer holes over undercut in shaft and tighten
set screws.
14. Insert two packing rings, staggering the joints 90°.
15. Install the lantern ring and then the other two packing
rings, staggering them 90°.
16. Install, but do not tighten the packing gland.
17. Slide bearing cover on shaft. Replace snap rings (if used).
Clean and regrease bearings. Place on shaft, lock in place,
with lockwasher and locknut. Install bearing bracket and
bearing cover.
18. Replace drain plug.
19. Install coupler and align, following the instructions located in
the section titled “Coupler Alignment.”
20. Install coupler guard. Refer to separate instructions titled
“Hex Coupler Guard Removal/Installation.”
21. Open isolation valves and check pump for leaks. If not
leaking, return pump to service, using the -PF Start-up
Instructions.
WARNING: Excessive Pressure Hazard
Make certain internal pressure is relieved before con-
tinuing. Failure to follow these instructions could result in
serious personal injury or death, or property damage.
SPECIAL INSTRUCTIONS FOR PUMPS (VSCS-PF) 8 x 10 x 17
TO REPLACE THE PACKING:
4. Remove flush tube and tube fitting from inside bearing
bracket.
5. Remove bearing cover and release bearing cam lock.
6. Remove capscrews that hold the bearing housing to the
volute coverplate and release, using capscrews in jack-
screw holes.
7. Pull housing and bearing from shaft.
8. Remove packing gland capscrews and packing gland.
9. Using a packing puller, remove packing rings and lantern
ring.
10. Remove and replace the shaft sleeve. Apply anti-seize
compound only to the area of the shaft that will be under
the sleeve. Install new sleeve on shaft. Position sleeve
drive collar outer holes over undercut in shaft and tighten
set screws.
11. Insert two packing rings, staggering the joints 90°.
12. Install the lantern ring and then the other two packing
rings, staggering them 90°.
13. Install, but do not tighten the packing gland.
IMPORTANT! When working on the packing on the non-
coupler end, it is necessary to force the pump shaft back
from the coupler end as far as possible and to hold it in
this position while installing and locking the bearing to the
shaft. Also, when replacing both packings, the packing on
the non-coupler end of the pump should be installed first.
WARNING: Excessive Pressure Hazard
Make certain internal pressure is relieved before con-
tinuing. Failure to follow these instructions could result in
serious personal injury or death, or property damage.
14. Install the bearing housings. Clean and regrease the bear-
ings and insert into bearing housings. Push the pump shaft
back from the motor end as far as possible, using a lever if
necessary. Hold the shaft in this position. On the outboard
bearing tap inner race until it is properly positioned against
the shaft shoulder. Install and lock the cam lock into posi-
tion. If the shaft and bearing are properly positioned, the
cam lock set screw will fall in the center of the shaft under-
cut. Release the shaft. Install the outboard bearing cap.
Install the inboard bearing by tapping the inner race until it
contacts the shaft shoulder, lock the bearing in place with
the cam lock. Install the inboard bearing cap.
15. Connect flush tubing to seal housing.
16. Replace drain plug.
17. Install coupler and align, following instructions located in
the section titled “Coupler Alignment.”
18. Install coupler guard. Refer to separate instructions titled
“Hex Coupler Guard Removal/Installation.”
19. Open isolation valves and check pumps for leaks. If not
leaking, return pump to service using the -PF Start-up
Instructions.