7 Servicing/Maintenance
53 of 72
HPK
5.
Pull the complete mechanical seal assembly with shaft protecting sleeve 524.01,
seal cover 471.01 and thrower 507.01 off the shaft.
6.
If required, unscrew socket head cap screws 914.09 and use forcing screws to
pull out angular casing wear ring 502.02.
7.
Remove hexagon nuts 920.15.
8.
Use forcing screws 901.31 to separate casing cover 161 from bearing bracket
lantern 344.
Lifting lugs can be screwed into the casing cover for transport.
7.4.6.2 Dismantling the packed gland
ü
The notes and steps stated in
(
ð
Section 7.4.1, Page 50)
to
(
ð
Section 7.4.5, Page 52)
have been observed/carried out.
ü
The back pull-out unit is kept in a clean and level assembly area.
1.
Unscrew hexagon nuts 920.02 at gland follower 452 and remove the gland
follower.
2.
Remove stuffing box ring 454.01 and drip plate 463.01.
3.
Remove hexagon nut 920.03.
4.
Use forcing screws to remove stuffing box housing 451.01 with the packed
gland from casing cover 161.
5.
Remove packed gland 461.01 and lantern ring 458.01 from the packing
chamber.
6.
Undo socket head cap screws 914.04, if any, and remove neck bush 456.01.
7.
If required, unscrew socket head cap screws 914.09 and use forcing screws to
pull out angular casing wear ring 502.02.
8.
Remove hexagon nuts 920.15.
9.
Use forcing screws 901.31 to separate casing cover 161 from bearing bracket
lantern 344.
Lifting lugs can be screwed into the casing cover for transport.
10.
Pull off guard 680.
11.
Pull shaft protecting sleeve 524.01 and thrower 507.01 off shaft 210.
7.4.7 Dismantling the bearings
ü
The notes and steps stated in
(
ð
Section 7.4.1, Page 50)
to
(
ð
Section 7.4.6, Page 52)
have been observed/carried out.
ü
The bearing bracket has been placed in a clean and level assembly area.
1.
Unscrew hexagon nuts 920.04 at the flange of bearing bracket lantern 344.
2.
Remove bearing bracket lantern 344.
3.
Unscrew the hexagon socket head cap screw in the coupling hub.
4.
Pull the coupling half off the pump shaft with a puller.
5.
Remove key 940.02 and thrower 507.02.
6.
Undo screws 914.02 and remove drive-end bearing cover 360.02 and joint ring
400.02.
7.
Undo screws 914.01 and remove pump-end bearing cover 360.01 and joint ring
400.01.
8.
Carefully drive shaft 210 together with angular contact ball bearing 320.02 and
the inner race of cylindrical roller bearing 322.01 out of the bearing bracket
towards the drive end.
9.
Remove support disc 550.23 of angular contact ball bearing 320.02 from bearing
bracket 330.
10.
Remove cylindrical roller bearing 322.01 (roller cage) from bearing bracket 330.
11.
Bend open lock washer 931.01 behind slotted round nut 920.21 on shaft 210.