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Operating Instructions
10/2010
1096.0799 | VU / VH Series
23
7.5.4
Disassembly of VU 20/40, VH 20/40/60
Cross-sectional drawing VU 20/40
Cross-sectional draw-
ing, page 48
Cross-sectional drawing VH 20 - 60
Cross-sectional
drawing, page 60
The pump has been removed from the system and is
stored in a clean and level assembly area.
1.
Disassembly of bearing housing and suction casing
Bring the pump into an upright position (drive side
pointing up).
Remove the fitting key (940) from the pump shaft
(211).
Loosen the hexagon head screws (901.1) on the bear-
ing cover (360), take off the bearing cover.
Loosen the hexagon nuts (920), remove the hexagon
nuts and the casing bolts (563).
Pull the bearing housing (330) and the rolling bearing
(320) off the pump shaft.
Remove the shaft sealing casing (441) from the suc-
tion casing (106).
2.
Disassembly of mechanical seal (RU 1) (
Preparations for
assembly, page 26)
Pull the rotating unit of the mechanical seal (047) off
the pump shaft (211).
Remove the suction casing (106) and pull the ring
(500.2) off the pump shaft.
3.
Disassembly of inter casings, stage casings and impellers
Pull the inter casing (137), stage casing (110) and im-
peller (230) off the pump shaft (211).
Remove the fitting key (940.1) from the pump shaft.
Additional steps for VH 20/40/60
Pull the inter casings (137.1/137.2), stage casing
(110) and impeller (230.1) off the pump shaft
(211).
Remove the fitting key (940.1) from the pump
shaft (211).
Remove the inter casing (137.3).
4.
Disassembly of bearing housing and discharge casing
Rotate the pump 180° (drive side pointing down).
Loosen the hexagon head screws (901.1) on the bear-
ing cover (360.1), take off the bearing cover.
Remove the locking ring (932) from the pump shaft
(211).
Pull the bearing housing (330), rolling bearing (320)
and ring (500.1) off the pump shaft (211).
Remove the shaft sealing casing (441) from the dis-
charge casing (107).
5.
Disassembly of mechanical seal (RU 2) (
Preparations for
assembly, page 26)
Remove the pump shaft (211) from the discharge cas-
ing (107).
Pull the rotating unit of the mechanical seal (047) and
the ring (500.2) off the pump shaft (211).
6.
Disassembly of mechanical seal (SU 1/2) (
Preparations
for assembly, page 26)
Push the stationary units of the mechanical seal
(047/047.1) out of the shaft sealing casings (441).
7.
Additional steps for VH 20/40/60
Disassembly of central inter casings
Separate inter casings 137.1 and 137.2.
Remove the ring (500) and the packing gland
(461) from the inter casings (137.1/137.2).
7.5.5 Disassembly of VU 80/140/220
VH 110/140/180
Cross-sectional drawing VU 80 - 220
Cross-sectional
drawing, page 48
Cross-sectional drawing VH 110 -180
Cross-sectional drawing, page 60
The pump has been removed from the system and is
stored in a clean and level assembly area.
1.
Disassembly of pipes (not applicable to VU 80/VH 110)
Loosen the hexagon nuts (920/920.1), remove the
pipes (700/700.1) and seals (400).
2.
Disassembly of bearing housing on suction casing (drive
side)
Remove the fitting key (940) from the pump shaft
(211).
Loosen the hexagon head screws (901.1) on the bear-
ing housing (330), pull the bearing housing with the
rolling bearing (320) off the pump shaft (211).
3.
Disassembly of mechanical seal (RU 1) (
Preparations for
assembly, page 26)
Loosen the hexagon head screws (901.1) on the shaft
sealing casing (441).
Pull the shaft sealing casing (441) and the rotating unit
of the mechanical seal (047) off the pump shaft (211).
4.
Disassembly of bearing housing on the discharge casing
(non-drive side)
Loosen the hexagon head screws (901.1) and take off
the bearing cover (360.1).
Loosen the lock washer (931.1) and the shaft nut (921)
and pull them off.
Loosen the hexagon head screws (901.1) and pull the
bearing housing (330) with the rolling bearing (320) off
the pump shaft (211).
5.
Disassembly of mechanical seal (RU 2) (
Preparations for
assembly, page 26)
Loosen the hexagon head screws (901.1) and pull the
shaft sealing casing (441) off the pump shaft (211).
Pull the rotating unit of the mechanical seal (047.1) off
the pump shaft (211).
6.
Disassembly of suction casing
Rotate the pump 90° (drive side pointing up).
Loosen the hexagon nuts (920.1), remove the nuts and
casing bolts (563).
Remove the suction casing (106).
7.
Disassembly of stage casing and pump shaft
Remove the stage casing (110).
Remove the pump shaft (211) with the impeller (230).
With VH 110/140/180
Remove the pump shaft (211) with the inter cas-
ings (137.1/137.2) and impellers (230/230.1).
Remove the stage casing (110.1).
8.
Disassembly of impeller and pump shaft
Loosen the shaft nut (922) and the lock washer (931)
at the drive side and, together with the impeller (230),
pull them off the pump shaft (211).
Additional steps for VH 110/140/180
Remove the fitting key (940.1) from the pump
shaft (211).
Pull the inter casings (137.1/137.2) jointly off the
shaft sleeve (523).
Pull the impeller (230.1) and the shaft sleeve
(523) off the pump shaft.
Pull the fitting key (940.1), the shaft nut (922) and the
lock washer (931) off the pump shaft (211).