Maintenance
38
GA 05137_1102 - 12/2003
4 Maintenance
We recommend a standard bearing change after 20,000
operating hours at the latest. Moreover, we are recom-
mending an exchange of the rotor unit after 45,000 ope-
rating hours at the latest.
Such maintenance work can only be done by the LEY-
BOLD Service. If required contact the LEYBOLD service
center nearest to your location. You can find the address
on our internet page www.leyboldvac.de.
At high pump loads - for example during cyclic operation,
at high gas throughputs or at high ambient temperatures
- the aforementioned maintenance work should be car-
ried forward (at the latest after 15,000 and 40,000 hours
respectively).
When using purge gas valves
Depending on the degree of contamination of the purge
gas used the filter will clog and will have to be exchan-
ged (our experience indicates that this will become
necessary after 1 to 6 months).
When using an adsorption trap
Regenerate or renew the adsorption agent regularly;
refer to the operating instructions provided with the trap.
Caution
The pump must only be opened by such
persons who have been authorised by Ley-
bold to do so.
4.1 Cleaning
If required clean the turbomolecular pump with a dry
cloth.
4.2 Service by LEYBOLD
Whenever you send a pump to Leybold, indicate
whether the pump is contaminated or is free of sub-
stances which could pose a health hazard. If it is conta-
minated, specify exactly which substances are involved.
You must use the form we have prepared for this purpo-
se; we will forward the form on request.
A copy of the form is printed at the end of these opera-
ting instructions: „Declaration of contamination of vacu-
um equipment and components“. Another suitable form
is available from the Leybold homepage:
http://www.leyboldvac.de under the headline “customer
service”.
Attach the form to the pump or enclose it with the pump.
This statement detailing the contamination is required to
satisfy legal requirements and for the protection of our
employees.
Pumps which are not accompanied by a contamination
statement will be returned to the sender.
Summary of Contents for TURBOVAC TW 250 S
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