AEG Electrolux EHG 679 B Instrucciones de operaciones descargar pdf (Pagina 19)

Fig. 12 Exchanging the outer shaft seal

Key to Fig. 12

1 Coupling element

2 Hexagon socket screw

3 Spring washer

4 Coupling (one half)

5 Key

6 Bushing

7 O-ring

8 Shaft seal

9 Centering disk

10 Hexagon socket screws

Position of the shaft seal

GA 01.202/9.02 - 03/96

Maintenance

3.6 Replacing the Outer

Shaft Seal

Required tools:

Allen keys 3 mm, 5 mm, 8 mm, flat-nose pliers, plastic

hammer, shaft seal driver, possibly puller for coupling.

The TRIVAC 16/25 B has two shaft seals; the outer one

is subject to greater wear. Oil marks under the coupling

housing are signs of a damaged outer shaft seal.

The outer shaft seal (12/8) can be replaced without

removing or disassembling the pump module.

Shutdown the pump.

Drain the oil (see Section 3.2) or place the pump on its

front side.

Unscrew the four non-recessed hex. socket screws

(11/3) and remove the motor (11/4) together with the

intermediate flange (11/5).

Remove the coupling element (12/1).

Remove the hex. socket screw (12/2) and the spring

washer (12/3).

Pull off the coupling (12/4).

Remove the key (12/5).

Unscrew the hex. socket screws (12/10) and pull off the

centering disk (12/9).

If the centering disk is stuck, screw the capscrews

(12/10) into the jackscrew holes in the centering disk.

Carefully force the shaft seal (12/8) out of the centering

disk.

Carefully pull off the bushing (12/6) from the shaft and

remove the O-ring (12/7).

We recommend the use of a new shaft seal, an O-ring

and bushing for reassembly.

Before insertion, moisten the new shaft seal slightly with

a little vacuum pump oil.

Using a suitable plastic or aluminium cylinder (shaft seal

driver) and a plastic hammer, force the shaft seal (12/8)

carefully and without bending it into the centering disk

(for position of shaft seal, see Fig. 12).

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