BUSCH COBRA DS 0600 E, Installation And Maintenance Instructions Manual

Page: 16 / 24

Oil change
DANGER
If the vacuum pump has pumped gases that were contaminated
with foreign bodies that are hazardous to health, the oil is also
contaminated with these foreign bodies.
There is a health hazard when changing contaminated oil.
There is also a danger to the environment.
Wear protective clothing when replacing contaminated oil.
Contaminated oil must be treated specially and must be disposed
of according to applicable regulations.
Draining used oil
NOTE : After switching off the vacuum pump at normal operating tem-
perature wait no more than 20 minutes before the oil is drained.
l Make sure that the vacuum pump is switched off and cannot acci-
dentally be switched on again
l Make sure that the vacuum pump is vented to atmospheric pres-
sure
l Put a drain tray underneath the oil drain plugs (ODP)
l
Unscrew the oil drain plugs (ODP)
l Carefully remove the drain plugs
l Drain the oil
l Because of wear and tear on the seal replace the current drain
plugs with new ones
When the oil flow has stopped:
l Close the oil drain plugs (ODP)
l
Switch on the vacuum pump for a few seconds
l Make sure that the vacuum pump is switched off and cannot acci-
dentally be switched on again
l Carefully remove the oil drain plugs again and drain any remaining
oil
l Check that no metal swarf sticks to the magnet of the drain plug,
clean if necessary
l Refit the oil drain plugs and tighten up
l 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
l
Prepare the quantity of oil needed (see “Oil type/quantity”)
WARNING
The use of chemically contaminated or polluted oil can lead to ha-
zardous 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.
l 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.
l Unscrew the oil filler cap (OFP)
Oil level, pump not operating
l Fill in oil up to the target circle of the oil sight glasses
l Make sure that the oil level is in the target circle of the oil sight
glasses
l Make sure that the seals of the filler cap are not damaged and that
they sit properly. Replace them if necessary
l Screw on the filler cap again
Checking the cooling liquid
Checking the level of the cooling liquid
l Make sure that the vacuum pump has been switched off and that
it cannot be switched on again accidentally
l Check the level of the cooling liquid.
u
Unscrew purge valve on cylinder upper plate.
Cooling liquid level should be just under the plate.
If the level is below:
u Top up with cooling liquid (see “Refilling cooling liquid”)
Refilling cooling liquid
NOTE : Cooling liquid does not normally have to be refilled outside the
recommended change intervals. A drop in the level of the liquid indica-
tes a fault (see “Troubleshooting”).
l Make sure that the vacuum pump has been switched off and that
it cannot be switched on again accidentally
l Unscrew the filler cap (CLF) for the cooling liquid
l Open purge valve (CLV) on cylinder upper plate and drain plug on
cylinder endplate B-side
l Fill in by filler hole until cooling liquid flows by drain plug of cylin-
der upper plate
l Stop fill in
l
Close the drain plug
l Fill in again by filler hole until cooling liquid flows by purge valve
of cylinder upper plate
l Close the drain clock
l Screw on the cooling liquid filler cap again
l If liquid has run on to the outside surfaces of the vacuum pump,
wipe it off
Maintenance
DS 0600 E
Page 16
0870772383 (En)
MAX
MIN
MAX
MIN
MAX
MIN