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8. Maintenance / Replacement
No liability for personal injury nor material
damage will be accepted for damages and
operational interruptions which have been
caused by improper maintenance; in addition,
all guarantees become invalid.
The bearing of the turbomolecular pump must be exchanged,
as a minimum requirement, every four years (request Pfeiffer
Vacuum Service to change).
Where extreme operating conditions or unclean processes
are involved, the replacement interval should be checked
with your Pfeiffer Vacuum Service Center.
You can replace the lubricant, the lubricant pump and the
Electronic Drive Unit TC 750 yourself.
Please contact your local Pfeiffer Vacuum Service for all
other maintenance and service work.
Ensure no mechanical forces act on the
Electronic Drive Unit TC 750.
8.1. Replacing The Lubricant
The lubricant should be replaced at least every 4 year.
Where extreme operating conditions or unclean processes
are involved, the replacement interval should be checked
with your Pfeiffer Vacuum Service Center.
Lubricant drain screw 72 may only be opened if
the turbopump has been vented to atmospheric
pressure.
Drain of and fill in the lubricant in the fitting
position if possible. If it is absolutely necessary
to dismantle the turbopump to change the
lubricant, this may only be carried out in the
position shown in Section 3.2. otherwise the
lubricant could contaminate the turbopump.
It is possible to detach the lubricating pump in
order to carry out a lubricant change.
➡
Switch off the turbopump, vent to atmospheric pressure
(see Section 4.6.) and allow to cool as necessary.
➡
Unscrew lubricant drain screw 72 and drain lubricant into
a suitable container.
☞
PLEASE NOTE
CAUTION
WARNING
CAUTION
☞
PLEASE NOTE
It is essential to ensure that the lubricant pump
is not over-filled with lubricant.
Overfilling will cause the excess lubricant to be
secreted from the hole for the lubricant filler
screw 71.
➡
Screw in lubricant filler screw 71 with the O-ring 75.
CAUTION
75
A
73
72
71
Filling in the lubricant
A
Syringe
71 Lubricant filler screw
72 Lubricant drain screw
73 Sight glass
75 O-ring
Lubricants can contain toxic substances from
the medium pumped. Lubricant must be
disposed of in accordance with the respective
regulations.
Safety instructions data sheet for the lubricant
on request.
➡
Screw back in the lubricant drain screw with the O-ring 75.
➡
Unscrew lubricant filler screw 71. Using the syringe provi-
ded inject approximately 40 ml (included in the delivery) of
lubricant as per the type plate.
Where the set-up position is vertical or
horizontal the maximum lubricant level in the
sight glass is the lower edge of lubricant filler
screw 71.
☞
PLEASE NOTE
WARNING
