Flowserve Worthington WXB User Manual download pdf (Page 39)

WXB USER INSTRUCTIONS ENGLISH - 07/14

Page 39 of 51

7.5 Setting impeller clearance

No axial adjustment of the rotor is necessary.

The rotor is not moving during operation.

7.6 Disassembly

See section 1.6, Safety, before dismantling

the pump.

Before dismantling the pump for

overhaul, ensure genuine Flowserve replacement

parts are available.

Refer to sectional drawings for part numbers and

identification.

7.6.1 Dismantling of pump

1) Completely drain the pump by using the drain

connection. By pumping explosive or toxic media,

flush your system with Nitrogen.

2) Remove coupling guard and uncouple the pump

from the motor. Pull off the coupling hub from the

pump shaft [2100] and take out the key [6700.2].

Ensure that the motor is

locked against start up.

If applied pull off the vane.

3) Drain the oil from both bearing housings, using the

plug [6569.1]. If required disconnect all auxiliary

pipings and auxiliary devices like vibration probes,

temperature probes, etc.

4) Due to the design with casing [1100] the complete

rotor of the pump can be taken out of the barrel

without disconnecting the suction or discharge

flange connections. To facilitate the moving out of

the complete rotor through the casing [1100], push it

by help with the hexagon head bolt [6577.3] and

clamp stramp [3121.2] out of the barrel fit. Further

insert a rod with a screwed end of 1“ pipe thread

into the bore of the tool [9310] on the bearing

housing. Now the complete rotor can be easily

pulled out of the barrel. For further dismantling bring

it to the workshop.

If a spare hydraulic cartridge is available, this can be

inserted into the barrel, and the pump is back in

service in a few hours.

If the whole pump should be removed, proceed

with step 5) and 6).

5) The pump has to be disconnected from suction and

discharge pipe. The alignment of the pump and

driver has to be checked and put it down in writing.

6) Unscrew the mounting screws of the pump on the

base plate. If the discharge casing were placed on

the base plate by taper pin, remove them too. Lift

the pump to a clean area by crane or other lifting

device where the pump can be disassembled.

7.6.2 Dismantling of the line bearing side

1) Loosen hexagon head bolt [6577.1] of both bearing

covers [3260.4] and [3260.3].

2) Remove bearing cover [3260.1] together with

labyrinth ring [4330.3] and O-ring [4610.1] from the

pump.

3) Unscrew hex nuts [6581.2] and remove carefully

bearing housing [3200.2] and outer ring of radial

roller bearing [3012] with the aid of a crane from the

pump.

4) Now unscrew the shaft nut [2910.2] and pull off

lockwasher [6541.2], washer [2905.2], bearing

adaptor sleeve [2471.2], O-ring [4610.8], inner ring

of radial roller bearing [3012], sleeve [2471.2] and

O-ring [4610.8] from pump shaft.

5) Now remove bearing cover [3260.3], if necessary.

Line bearing:

NU409 2WXB

NU411 3WXB

NU413 4WXB

NU413 6WXB

7.6.3 Dismantling of the thrust bearing side

1) Unscrew the mounting screw of fan case and

remove it. Unscrew the clamping screw of fan and

pull it off from the pump shaft.

2) Loosen the hexagon head bolt [6577.1] from bearing

cover [3260.1] and loosen the hexagon head bolt

[6577.1] from bearing cover [3260.2].

3) Remove bearing cover [3260.1] together with

labyrinth ring [4330.2] from the pump.

4) Unscrew hex nuts [6581.2] and remove carefully

bearing housing [3200.1] together with the aid of a

crane from the pump.

5) Now unscrew the shaft nut [2910.1] and pull off

lockwasher [6541.1], washer [2905.1], the two thrust

ball bearings [3013], bearing adaptor sleeve

[2471.1] and the O-ring [4610.2] from pump shaft.

6) Now remove bearing cover [3260.2] ,if necessary.

Thrust bearing:

7409 BGM 2WXB

7411 BGM 3WXB

7413 BCBM 4WXB

7413 BCBM 6WXB

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Flowserve Worthington WXB User Manual Page 39

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