Draining used oil
NOTE
: After switching off the vacuum pump at normal operating
temperature wait no more than 20 minutes before the oil is drained.
Make sure that the vacuum pump is switched off and cannot
accidentally be switched on again
Make sure that the vacuum pump is vented to atmospheric
pressure
Put a drain tray underneath the oil drain plugs (ODP)
Remove the oil drain plugs (ODP)
Carefully remove the drain plugs
Drain the oil
Because of wear and tear on the seals replace the current drain
plugs with new ones
When the oil flow has stopped:
Close the oil drain plugs (ODP)
Switch on the vacuum pump for a few seconds
Make sure that the vacuum pump is switched off and cannot
accidentally be switched on again
Remove the oil drain plugs again and drain any remaining oil
Check that no metal swarf sticks to the magnet of the drain plug,
clean if necessary
Refit the oil drain plugs and tighten up
Dispose of the used oil in compliance with applicable regulations
CAUTION
Because the ends of the drain plugs are magnetic, metal swarf can
stick to them. Always clean away this swarf when removing the
drain plugs.
Because of wear and tear of the seals, it is recommended to replace
the drain plugs whenever the oil is changed.
Filling in new oil
Prepare the quantity of oil needed (see “Oil type/ quantity”)
WARNING
The use of chemically contaminated or polluted oil can lead to
hazardous pump conditions which could cause personal injury.
NOTE
: The quantity of oil specified in the installation handbook is of
informative nature only. Check the oil level with the help of the various
oil sight glasses on the vacuum pump.
Make sure that the drain plugs have been fitted properly and that
they do not leak
CAUTION
Only fill in oil through the oil filler opening.
Unscrew the oil filler cap (OFP)
Fill in oil up to the middle of the oil sight glass
Make sure that the oil level lies between the MIN and MAX
markings on the oil sight glasses
Make sure that the seals of the filler cap are not damaged and that
they sit properly. Replace them if necessary
Screw on the filler cap again
Checking the cooling water
Checking the cooling water flow
Check the cooling water flow regularly
If the flow drops, check for leaks
Make sure that the specifications of the cooling water are
followed
Checking the nitrogen
Checking the nitrogen flow
Check the nitrogen flow regularly
If the flow drops, check for leaks
Make sure that the specifications of the nitrogen are followed
Checking the current consumption
Check the current intensity of the motor
An increased intensity is an indication for a fault (see
“Troubleshooting”)
Checking the silencer (accessory)
Make sure that the condensate does not collect at the exhaust of
the vacuum pump
Drain the condensate and collect it in a container
Dispose of the condensate according to applicable environmental
protection regulations
Check the silencer regularly and clean it if necessary
Checking the leak-protection
non-return valve (accessory)
Check the leak-protection non-return valve regularly and clean it if
necessary
CAUTION
Wear protective clothing when carrying out maintenance work on
the silencer and leak-protection non-return valve.
There could still be residues of contamination.
Overhaul
CAUTION
Inappropriate maintenance work on the vacuum pump can damage
the pump.
Danger of explosion!
If requirements are not met, the vacuum pump may not be switched
on!
Should work exceed the dismantling work described in this
handbook, it may only be carried out by authorized persons.
Overhaul
Page 17
BC 0601 G
0870235875
(En)
Summary of Contents for COBRA BC 0601 G
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