Multitech 1777.8/7-10 G3 operating instructions Replacing the shaft protecting sleeve

Page 18

Multitec

7.3.4Dismantling and replacement of shaft seal Gland packings

7.3.4.1 Replacing the packing rings

Access to packing rings without removing the bearing or the lantern:

-Undo both nuts 920.3 and pull gland cover 452 out of seal housing 441.1.

-Remove packing rings 461.

7.3.4.1Replacing the shaft protecting sleeve

-Remove the bearing as described in sections 7.3.3.1 and 7.3.3.2.

-Remove packing rings as described in section 7.3.4.1.

-On grease-lubricated pumps, pull V-ring 411.6 off spacer sleeve 525.1.

-Remove O-ring 412.10.

-Pull off spacer sleeve 525.1.

-Remove bearing housing 350.1.

-Remove seal housing 441.1 with gland cover 452.

-Remove key 940.2.

-Take off sleeve 524 with a puller,

using the groove provided in the sleeve.

-Remove O-ring 412.4.

N.B.: If sleeve 524 is hard to remove, the balance drum can be used for leverage.

- Remove balance drum 59-4, disc 550.3 and sleeve 524 with a puller engaged in the threaded holes on the drum.

This is not possible on pumps without balance drum.

Fig. 30

Pump design without balance drum

Fig. 31

18

7.3.5Dismantling the mechanical seal 7.3.5.1 Dismantling the mechanical seal

-Remove the bearing as described in sections 7.3.3.1 and 7.3.3.2.

-On grease-lubricated pumps, pull V-ring 411.6 off spacer sleeve 525.1.

-Remove O-ring 412.10.

-Pull off spacer sleeve 525.1.

-Remove any auxiliary pipework (circulation, etc.), depending on the pump version.

-Loosen the nuts 920.3 on the mechanical seal cover until the spring is relaxed.

-Remove bearing housing 350.1.

-Take off mechanical seal cover 471.1 with the seat ring and gasket 400.1, remove spring-loaded ring (not in case of bellows-type seals).

-Remove key 940.2.

-Pull off sleeve 523.1 with the rotating assembly of the mechanical seal. (Two holes are provided in the sleeve for engaging a puller.)

-Take off seal housing 441.1.

-Remove O-ring 412.4.

Fig. 32

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Contents High-pressure pumps in ring-section design Operating instructions 1777.8/7-10 G3Works No Type series Multitec Contents Section Adjusting dimensions for coupling Multitec IndexSafety Multitec GeneralMultitec Transport, storageAccessories Description ProductInstalling the pump/unit Multitec Installation at siteFoundation / Checks to be carried out prior to installation Close-coupled pumpsThread Strength Drive Non-drive End Aligning the pump / drive Coupling guardBe tightened to the following torques Tightening torque 100 120 NmMax. permissible pipeline forces material codes 20 to Connecting the pipingMax. permissible pipeline forces material codes 10, 11, 12 Protection against foreign matterVacuum balance line Connection to power supplySetting the time relay Checking the direction of rotationMultitec Commissioning, start-up / Shutdown Shutdown Temperature of the fluid pumpedStart-up Gland packingMinimum flows Switching frequencyReturning to service after storage Density of fluid pumpedGeneral instructions Multitec Servicing / maintenanceBearings and lubrication PumpShaft seal Mechanical seal Oil quality / Oil changeMotor CouplingAxial suction nozzle Dismantling the bearingsDismantling the non-drive-end bearings Plain bearing Radial suction nozzleOil lubrication with labyrinth seal fig Grease lubrication figsOil lubrication with lip seal fig Grease lubricationReplacing the shaft protecting sleeve Removing a double-acting mechanical seal Intermediate bearing bush Intermediate bearing diffuser ReassemblyDismantling the hydraulic system With the rules of sound engineering practiceReassembly of hydraulic system Stuffing box housingSeals Gland packing Sealing elements Mechanical sealsHorizontal baseplate-mounted pump units Leakage at the mechanical sealTightening the shaft nuts on Multitec pumps Fixed bearing MTC 100/125/150Rolling element bearing sizes Grease-lubricated bearings Installation and returning to service Temperature of the rolling element bearingsRe-adjusting the clearance gaps Maximum clearance gaps Radial bearingMultitec Trouble-shooting General assembly drawing Pump sizes 32 toVertical design Pump sizes 32, 50 Close-coupled pump up to pump sizeRadial suction nozzle Pump sizes 100, 125Pump sizes 125 525.1/2/4 Spacer sleeve List of componentsDescription 529Achtung Attenzion BildKSB Aktiengesellschaft

1777.8/7-10 G3 specifications

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