Operating Instructions
10/2010
1096.0799 | VU / VH Series
25
4.
Disassembly of bearing housing on discharge casing (non-
drive side)
Loosen the hexagon head screws (901.1), remove the
bearing cover (360).
Loosen the lock washer (931) and the shaft nut (921)
on the pump shaft (211) and pull them off.
Pull off the ring (500).
Pull off the bearing housing (330) with the rolling bear-
ing (320).
Pull off the splash ring (507).
5.
Disassembly of mechanical seal (RU 2)
Loosen the hexagon head screws (901.3), pull the
shaft sealing casing (441) and 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 nuts (920), remove the nuts and casing
bolts (563).
Loosen the screw fittings (731) on the pipe (710).
Remove the suction casing (106) and the pipe.
7.
Disassembly of stage casing and pump shaft
Remove the stage casing (110)
Remove the pump shaft (211) with the impeller (230)
8.
Disassembly of impeller and pump shaft
Loosen and remove the impeller nut (922) and the lock
washer (931.1) at the drive side.
Pull the impeller (230) off the pump shaft (211).
Pull the fitting key (940), the lock washer (931) and the
impeller nut (922) off the pump shaft (211).
9.
Disassembly of mechanical seal (SU 1/2)
Push the stationary units of the mechanical seals
(047/047.1) out of the shaft sealing casings (441).
10. Disassembly of inter casing of the suction/discharge casing
Loosen the hexagon socket head screw (914) in the
suction/discharge casing (106/107).
Remove the inter casing (137/137.1) from the suc-
tion/discharge casing (106/107).
11. Disassembly of valve flaps
Loosen the hexagon head screws (901.2) on the inter
casing (137/137.1).
Remove the stop plate (598/598.1) and the flap valve
(746).
7.5.8 Disassembly of VU 500/600/800/1200/1600
Cross-sectional drawing VU 500 - 1600
Cross-sectional drawing, page 59
Cross-sectional drawing VH 500 - 1600
Cross-sectional drawing, page 61
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 800)
Loosen the hexagon nuts (920), remove the pipes
(700/700.1), the hexagon head screws (901) and the
seals (400.1).
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 (901.2/901.4), pull
the bearing housing (330) with the rolling bearing (320)
off the pump shaft.
VU/VH 500/600
Pull off the splash ring.
3.
Disassembly of mechanical seal (RU 1) (
Preparations for
assembly, page 26)
Loosen the hexagon head screws (901.1/901.2), pull
the shaft sealing casing (441) and the rotating unit of
the mechanical seal (047) off the pump shaft.
Pull off the spacer sleeve (525).
4.
Disassembly of bearing housing on discharge casing (non-
drive side)
Loosen the hexagon head screws (901.1), remove the
bearing cover (360.2).
Loosen the lock washer (931.1) and the shaft nut
(921.1) on the pump shaft (211) and pull them off.
Pull off the ring (500.1).
Loosen and pull the withdrawal sleeve (531) off the
pump shaft by tightening the supplied shaft nut (921).
Loosen the screws (901.2/901.4), pull off the bearing
housing (330) with the rolling bearing (320.1) and the
ring (500).
VU/VH 500/600
Pull off the splash ring (507).
5.
Disassembly of mechanical seal (RU 2) (
Preparations for
assembly, page 26)
Loosen the hexagon head screws (901.1/901.2), pull
the shaft sealing casing (441) and the rotating unit of
the mechanical seal (047.1) off the pump shaft (211).
Pull off the spacer sleeve (525).
6.
Disassembly of suction casing
Rotate the pump 90° (drive side pointing up).
Loosen the nuts (920/920.1), remove the nuts and the
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)
VH 500/600/800/1200/1600
Remove the pump shaft (211) with the inter casings
(137.1/137.2) and impellers (230/230.1).
Remove the stage casing (110.1).
8.
Disassembly of impeller and pump shaft
Loosen and remove the impeller nut (922) and the lock
washer (931) at the drive side.
Pull the shaft protection sleeve (524) and the impeller
(230) off the pump shaft (211).
Additional steps for VH 500/600/800/1200/1600
Remove the fitting key (940) from the pump shaft.
Pull the inter casings (137.1/137.2) jointly off the
shaft protection sleeve (524.1).
Pull the impeller (230.1) and the shaft protection
sleeve (524.1) off the pump shaft.
Pull the fitting key (940), the lock washer (931) and the
impeller nut (922) off the pump shaft (211).
9.
Disassembly of mechanical seal (SU 1/2) (
Preparations
for assembly, page 26)
Push stationary units of the mechanical seals
(047/047.1) out of the shaft sealing casings (441).
