DVZ Biomaster PLUS Series Final Documentation Download

Page: 114 / 145

Issue: 18.10.2011

DVZ-SKA-”BIOMASTER”-PLUS – Pump P2

Page 7 of 6

SKA-PLUS-ANNEX P5-Eng

Disassembly of the rotor and the joint on the rotor
side

The rotor and the rotor-side joint are disassembled after
removal of the stator (402).
- Remove hexagon nuts (607) and serrated lock washers

(608) as well as hexagon head bolts (606).

- Pull off the suction casing (505) over the rotor (401),

taking care that the precision-machined rotor is not
damaged in the process.

- Remove the suction casing gasket (501).
- Cut the lock on the clamping band (306) with a metal

saw and press out on both sides using a screwdriver.
Remove the clamping band (306) from the cover sleeve
(308) (see Figure 2).

Figure 2: Removing the clamping band.

- Lift the cover sleeve (308) with a screwdriver and pull it

off axially in the direction of the coupling rod (307).

- Drain the oil content into a container.
- Drive the retaining sleeve (304) over the flange of the the

coupling rod (307). Do not twist the coupling rod (307)
in the p rocess (see Figure 3).

Figure 3: Removing the retaining sleeve

- Push out the coupling rod pins (301).
- Drive both guide bushes (303) halfway out using a

tapered brass drift. To do this, tilt the coupling rod (307)
(see Figure 4).

Figure 4: Removing the guide bushes

- Pull the rotor (401) from the coupling rod (307).
- Drive the guide bushes (303) completely out of the

rotor (401) using a tapered brass drift.

Disassembly of the coupling rod and the joint on
the drive side

The coupling rod and the drive-side joint are
disassembled after removal of the stator (402) and the
rotor (401).
- Disassemble the drive-side joint as described before.
- Pull the coupling rod (307) off the hollow shaft (125).
- Press out the coupling rod bush (302) from the

coupling rod (307).

- Drive the guide bushes (303) completely out of the

hollow shaft (125) using a tapered brass drift.

Removal of the shaft seal and the hollow shaft
Note:

For pumps with a shaft seal provided by gland

packing, the packing rings can be changed, as
described before, without removing the hollow shaft. It
is only necessary for the hollow shaft to be removed if
the pump is equipped with a mechanical seal. In cases
where the hollow shaft has been damaged in the area
of the shaft seal, the pump must likewise be
disassembled, as described below.
- Remove stator (402).
- Remove hexagon nut (607) and serrated lock washer

(608) as well as hexagon head bolt (606).

- Pull the suction casing (505) off over the rotor (401).

Take care that the precision-machined rotor surface
is not damaged in the process.

- Remove the suction casing gasket (501).
- Remove the splash ring (123) from the clamp set

(123).

- Loosen the clamp screws of the clamp set (123)

uniformly and sequentially.
If necessary, rotate the hollow shaft (125) in order to
do this. If the outer ring of the clamp set is not
automatically released from the inner ring, a few
clamp screws can be unscrewed and inserted into
the adjacent pull-off threads. Release can now be
easily achieved.

Never unscrew the clamp screws completely

(danger of accidents).

- Pull the hollow shaft (125), together with all parts of

the shaft seal and the clamp set (123), from the
motor bracket (122).

- Pull the clamp set (123) from the hollow shaft (125).

Disassembly of the gland packing

- Remove the hexagon nut (202) and gland (203).
- Pull the gland housing (204) from the holl ow shaft

(125).

- Remove the gland packing (207) from the gland

housing (204).