SPP Pumps Thrustream - Extended - Manual (Page 15)

Operators Instructions for Horizontal
Extended Thrustream Centrifugal Pumps
Manual No/Rev
W12-005E / 3
Our policy is one of continuous improvement and we reserve the right to alter specifications at any time
Page 13 of 28
bearing can cause severe damage.
The work area and all tools used for bearing
replacement must be clean and free of dust
and grit to prevent contamination of a clean
bearing and new grease.
Ball bearings should not be dismantled.
For pumps fitted with cartridge
mechanical seals:
Refer to the seal manufacturer’s instructions
in Appendix III and lock the seal before
removing the retaining nuts (52A) and sliding
the seals back from the face of the insert
(A/B53).
When replacing all the bearings, complete the
replacement of the drive end bearings
BEFORE commencing to replace the non-
drive end bearings.
Drive End Bearing Replacement Procedure
1. Remove the screws (64A) and slide the
bearing cap (64) along the shaft towards the
liquid thrower (72).
2. Remove the screws (62A and 53A) to free the
bearing housing (52) for removal.
3. Using a suitable puller, withdraw the bearing
housing from the shaft (71).
4. Using a suitable bearing puller on the inner
race, pull the bearing (67) off the shaft.
5. Clean the bearing thoroughly with an approved
cleaning fluid.
6. Dry the bearing with dry compressed air or
with a clean soft cloth by hand.
7. DO NOT SPIN A CLEAN DRY BEARING.
8. Inspect the bearing for wear, fractures, cracks,
corrosion or other damage, which may
necessitate replacement.
9. Lightly oil the bearing and wrap in greaseproof
paper to prevent contamination before
reassembly.
10. Check that the shaft, bearing cap and housing
are clean and undamaged.
11. It is recommended that new oil seals (64R)
are fitted when bearings are replaced to
ensure that contamination is prevented.
12. Slide the oil seal onto the shaft (71) wipe the
seal recess in the bearing cap (64) with
grease and set in position on the shaft against
the bearing cap.
13. Heat the bearing (67) to approximately 100
0
C
(212
0
F) using bearing hotplate, induction
heater or oven. NOTE - Do not exceed 120 0 C
(248
0
F).
14. Slide the heated bearing onto the shaft to abut
the shoulder. Ensure that the bearing sits fully
and squarely against the shoulder.
15. Cool the bearing to room temperature and
pack both sides with two/three ounces of
recommended grease.
16. Coat the inside of the bearing housing (62)
with grease and slide into place over the
bearings.
17. If necessary use two screwed rods to pull the
bearing housing towards the bearing cap then
fit four of the screws (62A), tighten evenly to
pull the bearing housings into place, fit and
tighten the remaining screws.
18. Fit the bearing cap (64) to the bearing housing
(62) using screws (64A).
19. Check that the shaft rotates freely by hand.
20. Secure bearing housing (62) to the insert
(B53) with screws (53A).
21. Fit the new oils seal (64) on the shaft to abut
against the bearing housing.
22. Where applicable refit and set the mechanical
seal as per the seal manufacturer’s
instructions in Appendix III.
Non-Drive End Bearing Replacement Procedure
1. Proceed as per the drive end bearing
replacement procedure, paragraphs 1 and 2.
2. Remove the cover plate (62Y) from the non-
drive end bearing housing and using a suitable
puller, withdraw the bearing housing from the
shaft (71).
3. Using a suitable punch, flatten the lock washer
(75F) and remove the bearing locknut (75)
and the lock washer.
4. Replace the non-drive end bearing and as per
the drive end bearing replacement procedure,
paragraphs 4 to 16.
5. Place the locking washer (75F) onto the shaft
and screw on the bearing lock nut (75).
6. Fit and tighten the bearing locknut to 300 Nm
ATTENTION