Multitech 1777.8/7-10 G3 - Manual (Page 20)

171.5 230.1 540.3
Caution
Caution
Multitec
20
7.3.6 Dismantling the hydraulic system
- Remove the bearings as described in sections 7.3.3.1 and
7.3.3.2 and the shaft seals as described in sections 7.3.4
and 7.3.5.
If possible, place the hydraulic system in vertical position and
start dismantling it from the discharge end.
- Undo the four tie bolts 905.
- Remove discharge casing 107, then dismantle the hydraulic
elements.
Note: Pump versions A/B/C/D in material variants 22/23/30
have an intermediate bearing in the middle stage as of the
number of stages given in the table (see fig. 36).
Pump size 32 50 65 100 125 150
No. of stages 8 7 6 6 5 6
Fig. 36
540.3
Intermediate bearing - bush
171.5 Intermediate bearing - diffuser
7.3.7 Recommended spare parts stock for 2 years’
continuous operation
We recommend to replace various wear parts,
e.g. rolling element bearings, sealing elements,
circlips, etc.) whenever the hydraulic system has been
completely dismantled.
Part No. Description Number of pumps
(including stand-by pumps)
2 3 4 5 6+7 8+9 10 and
more
For shaft seal codes 65 and 66 (gland packing)
210
230
231
320.1
320.2
381
411
412
461
502
1)
520
524
525
529
540
550.1
2)
59-4
Shaft with small parts
Impeller (set = S)
Suction stage impeller
Fixed bearing (set)
Radial bearing
Bearing cartridge
V-ring (set)
O-ring (set = S)
Gland packing (set)
Casing wear ring (set)
Sleeve
Shaft protecting sleeve
Spacer sleeve
Bearing sleeve
Bush
Disc
Balance drum 1
1
1
1
1
1
4
4
4
2
1
2
2
1
1
2
1 1
1
1
1
1
1
8
8
6
2
1
2
2
1
1
2
1 2
1
1
2
2
2
8
8
8
2
2
2
2
2
1
2
1 2
2
2
2
2
2
8
8
8
3
2
3
3
2
2
3
2 2
2
2
3
3
3
9
9
9
3
3
3
3
3
2
3
2 3
3
3
4
4
4
12
12
12
4
4
4
4
4
3
4
3
30 %
30 %
30 %
50 %
50 %
50 %
150 %
150 %
150 %
50 %
50 %
50 %
50 %
50 %
30 %
50 %
30 %
For shaft seal codes 61, 62, 63 and 64 (with mechanical seal)
433
523 Mechanical seal (compl.) 3)
Shaft sleeve (set)
2
2 3
2 4
2 5
3 6
3 7
4 90 %
50 %
For oil lubrication
421 4) Lip seal 4 8 8 8 9 12 150 %
423 4) Labyrinth ring 2 3 4 5 6 7 90 %
1) pump sizes 125 and 150 only
2) pump sizes 32 to 100 only
3) parts 461 and 524 are not fitted
4) depending on pump version
Note: Please always indicate the works number stamped onto
the pump name plate when ordering spare parts.
7.4
Reassembly
The pump shall be reassembled in accordance
with the rules of sound engineering practice.
- Under no circumstances use force.
- Due to their weight, some pump components must be
supported during reassembly.
- Before reassembly, the locating surfaces of the individual
components must be coated with a mounting aid in
compliance with hygienic and safety regulations.
- The properties of new pump components must not be
altered without prior consultation with our technical
departments.
- The parts must be clean and free from shavings or dust.
- Reassembly is effected in reverse order to dismantling.
- The tightening torques indicated must be complied with.
Avoid the use of mounting aids as far as possible. Should a
mounting aid be required after all, use a commercially
available contact adhesive, e.g. Pattex, Hylomar or Epple
33, after prior consultation with our technical departments.
The adhesive shall only be applied at selected points and in
thin layers. Do not use cyanoacrylate adhesives
(quick-setting adhesives).