Multitech 1777.8/7-10 G3 operating instructions Dismantling the hydraulic system, Reassembly

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Multitec

7.3.6Dismantling the hydraulic system

- Remove the bearings as described in sections 7.3.3.1 and

7.3.3.2and 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

171.5

540.3

230.1

 

 

 

540.3Intermediate bearing - bush

171.5Intermediate bearing - diffuser

7.3.7Recommended spare parts stock for 2 years’ continuous operation

Caution 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

Shaft with small parts

1

1

2

2

2

3

30 %

230

Impeller (set = S)

1

1

1

2

2

3

30 %

231

Suction stage impeller

1

1

1

2

2

3

30 %

320.1

Fixed bearing (set)

1

1

2

2

3

4

50 %

320.2

Radial bearing

1

1

2

2

3

4

50 %

381

Bearing cartridge

1

1

2

2

3

4

50 %

411

V-ring (set)

4

8

8

8

9

12

150 %

412

O-ring (set = S)

4

8

8

8

9

12

150 %

461

Gland packing (set)

4

6

8

8

9

12

150 %

502 1)

Casing wear ring (set)

2

2

2

3

3

4

50 %

520

Sleeve

1

1

2

2

3

4

50 %

524

Shaft protecting sleeve

2

2

2

3

3

4

50 %

525

Spacer sleeve

2

2

2

3

3

4

50 %

529

Bearing sleeve

1

1

2

2

3

4

50 %

540

Bush

1

1

1

2

2

3

30 %

550.12)

Disc

2

2

2

3

3

4

50 %

59-4

Balance drum

1

1

1

2

2

3

30 %

 

 

 

 

 

 

 

 

 

For shaft seal codes 61, 62, 63 and 64 (with mechanical seal)

 

 

 

 

 

 

 

 

 

 

 

433

Mechanical seal (compl.) 3)

2

3

4

5

6

7

90 %

523

Shaft sleeve (set)

2

2

2

3

3

4

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.

7.4Reassembly

Caution

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).

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Contents Works No Type series High-pressure pumps in ring-section designOperating instructions 1777.8/7-10 G3 Multitec Contents Section Adjusting dimensions for coupling Multitec IndexSafety Multitec GeneralMultitec Transport, storageAccessories Description ProductMultitec Installation at site Foundation / Checks to be carried out prior to installationInstalling the pump/unit Close-coupled pumpsAligning the pump / drive Coupling guard Be tightened to the following torques Tightening torqueThread Strength Drive Non-drive End 100 120 NmConnecting the piping Max. permissible pipeline forces material codes 10, 11, 12Max. permissible pipeline forces material codes 20 to Protection against foreign matterConnection to power supply Setting the time relayVacuum balance line Checking the direction of rotationMultitec Commissioning, start-up / Shutdown Temperature of the fluid pumped Start-upShutdown Gland packingSwitching frequency Returning to service after storageMinimum flows Density of fluid pumpedMultitec Servicing / maintenance Bearings and lubricationGeneral instructions PumpOil quality / Oil change MotorShaft seal Mechanical seal CouplingDismantling the bearings Dismantling the non-drive-end bearings Plain bearingAxial suction nozzle Radial suction nozzleGrease lubrication figs Oil lubrication with lip seal figOil lubrication with labyrinth seal fig Grease lubricationReplacing the shaft protecting sleeve Removing a double-acting mechanical seal Reassembly Dismantling the hydraulic systemIntermediate bearing bush Intermediate bearing diffuser With the rules of sound engineering practiceSeals Gland packing Reassembly of hydraulic systemStuffing box housing Mechanical seals Horizontal baseplate-mounted pump unitsSealing elements Leakage at the mechanical sealTightening the shaft nuts on Multitec pumps Rolling element bearing sizes Grease-lubricated bearings Fixed bearingMTC 100/125/150 Temperature of the rolling element bearings Re-adjusting the clearance gaps Maximum clearance gapsInstallation and returning to service Radial bearingMultitec Trouble-shooting General assembly drawing Pump sizes 32 toClose-coupled pump up to pump size Radial suction nozzleVertical design Pump sizes 32, 50 Pump sizes 100, 125Pump sizes 125 List of components Description525.1/2/4 Spacer sleeve 529Achtung Attenzion BildKSB Aktiengesellschaft

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