Maintenance
19
GA 03.108/14.02 - 01/03
5 Maintenance
5.1 Safety Information
The safety information given in the following applies to all
maintenance work.
Disconnect the electrical power before
disassembling the pump. Make absolutely
sure that the pump cannot be accidentally
started.
If the pump has been pumping harmful sub-
stances, determine the nature of hazard
and introduce suitable safety measures.
Observe all safety regulations !
If you send a pump to LEYBOLD for repair
please indicate any harmful substances exi-
sting in or around the pump. For this use the
„Declaration of Contamination“ form which
has been prepared by us and which we will
provide upon request.
Any pump received by us without, or an
incompletely filled in declaration will delay
the repair.
When shipping contaminated pumps which
require approval by the authorities, you
must observe the applicable packaging and
shipping regulations.
All maintenance and cleaning work descri-
bed in this section must be carried out only
by suitably trained personnel.
When disposing of used lubricants please
observe the relevant environmental regula-
tions.
Improper maintenance or repairs may affect
the service life and performance of the
pump, and cause problems when filing war-
ranty claims.
Advanced repair work not described here
should be left to the LEYBOLD service.
We would like to point out that LEYBOLD offers training
courses on the maintenance, repair, and troubleshooting
of RUVAC pumps. Further details are available on
request.
5.2 Exchanging the
Lubricant
Before pumping oxygen (or other highly
reactive gases) at concentrations excee-
ding the concentration in the atmosphere
(> 21 % for oxygen) it will be necessary to
use a special pump. Such a pump will have
to be modified and de-greased, and an inert
special lubricant (like PFPE) must be used.
Observe all safety information provided in
Section 5.1.
Very little lubricant is consumed by wear in the bearings
and the gear under clean operating conditions. We
recommend changing the oil or PFPE after the first 500
hours of operation to remove any wearing residue.
Then, under normal operating conditions, change the oil
after every 3,000 hours of operation.
Change the oil more frequently when pumping corrosive
vapours or large amounts of dust or when cycling fre-
quently from atmospheric to working pressure.
Under such operating conditions it is recommended to
regularly check the neutralisation value (to DIN 51 558)
based on a sample of oil. If the neutralisation value
exceeds 2, an oil exchange will be required.
Before removing the oil-drain or oil-fill plug
always switch off the pump first and vent to
atmospheric pressure.
When the pump has become warm during
operation the casing and the oil temperatu-
re may exceed 80 °C.
Leave the pump to cool down. Always wear
protective gloves also to protect yourself
against aggressive residues in the oil.
To simplify the process and also for safety
reasons we recommend the use of our oil-
drain facility (see Section 1.4).
Unscrew the oil-drain plugs (11/2) or (11/4) and the oil-
fill plug (11/3) and drain the oil.
Clean the sealing surface and firmly reinstall the oil-drain
plug (11/2) or (11/4) using a gasket which is in perfect
condition. Wipe off any oil residues from the casing.
Fill in new oil.
For oil quantities and ordering data see Sections 1.3 and
1.4.
Make sure to use the right kind of oil. PFPE pumps are
marked with a red label.
Only use Leybold oil.
Warning
Caution
Warning
Warning
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