AEG Electrolux EHG 679 B Instrucciones de operaciones descargar pdf (Pagina 15)

GA 01.202/9.02 - 03/96

Operation

3 Maintenance

Disconnect the electrical connections befo-

re disassembling the pump. Make absolute-

ly sure that the pump cannot be accidental-

ly started.

If the pump has pumped harmful sub-

stances, contrary to what has been stated

in Section 2.4, ascertain the nature of

hazard and take adequate safety measu-

res.

Observe all safety regulations.

If you send a pump to LEYBOLD for repair please indi-

cate any harmful substances existing in or around the

pump. A form is available from LEYBOLD for this purpo-

se.

When disposing of used oil, you must

observe the applicable environmental regu-

lations. !

Due to the design concept, TRIVAC-B pumps require

very little maintenance when operated under normal

conditions. The work required is described in the sec-

tions below. In addition to this, a maintenance plan is

provided in Section 3.10.

All work must be carried out by suitably trai-

ned personnel. Maintenance or repairs car-

ried out incorrectly will affect the life and

performance of the pump and may cause

problems when filing warranty claims.

LEYBOLD offers practical courses on the maintenance,

repair, and testing of TRIVAC-B pumps. Further details

are available from LEYBOLD on request.

If the TRIVAC-B is used in ambient air

which is much contaminated, make sure

that the air circulation and the gas ballast

valve are not adversely affected.

Pls. take the spare parts numbers from the

enclosed spare sparts list.

In case of special designs and variants

please always indicate the special, variant

and serial number.

3.1 Checking the Oil Level

During operation of the TRIVAC-B the oil level must

always remain between marks (9/2) and (9/3) on the oil-

level glass. The amount of oil must be checked and top-

ped up as required.

Fill in oil only after the pump has been swit-

ched off.

3.1.1 Checking the Condition of N 62 or

HE-200 Oil

The amount of oil required for an oil check should be

drained via the oil-drain port (9/4) into a beaker or simi-

lar container with the pump switched off but still at ope-

rating temperature.

• Visual check

Normally the oil is clear and transparent. If the oil dar-

kens, it should be changed.

• Chemical check

The neutralisation number of N 62 oil is determined

according to DIN 51558. If it exceeds 2,

the oil should be changed.

• Viscosity check

If the viscosity of N 62 oil at 25 °C exceeds 300 mPas,

the oil should be changed.

If gases or liquids dissolved in the oil result in a deterio-

ration of the ultimate pressure, the oil can be degassed

by allowing the pump to run for approx. 30 min. with the

intake port closed and the gas ballast valve open.

Caution

Attention

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AEG Electrolux EHG 679 B Instrucciones de operaciones Pagina 15

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