Maintenance
CAUTION
Any dismantling of the vacuum pump that is beyond the scope of
what is described in this manual must be done by specially trained
Busch service personnel only.
CAUTION
During operation the surface of the vacuum pump can exceed tem-
peratures of 90°C.
Risk of burns!
Before starting maintenance work, make sure that the vacuum pump
has been fully switched off and that it cannot accidentally be switched
on again. Follow the procedure for stopping the pump in section
“ Stopping procedure for maintenance ” :
–
Switch off the vacuum pump
–
Switch off the main power supply
–
Put up the warning sign “ Maintenance in progress ” on or next to
the pump
CAUTION
During operation the oil temperature of the vacuum pump can
reach a value of 120°C !
Risk of burns !
After the completion of all maintenance work, follow the procedure
“Start-up procedure after maintenance” “ :
–
Remove the sign “ Maintenance in progress ”
–
Check the oil levels, top up with oil if necessary,
switch on the main supply
–
Make sure that the “Installation Prerequisites” are complied with
–
Switch on the vacuum pump
Maintenance Precautions
CAUTION
The following safety instructions are only relevant when dismantling
the magnetic drive system.
DANGER
Keep people wearing a pacemaker away from the influence of the
magnetic field!
Danger to life
DANGER
Label any room, where assembly or dismantling work on the ma-
gnetic coupling system is carried out or where parts of the magne-
tic coupling system are stored, with the danger sign :
“ No trespassing for persons with pacemaker ”
●
Do not place the dismantled magnetic coupling into the vicinity of
computers, data carriers and other electronic components.
●
Keep all magnetizable parts away from the magnetic coupling.
CAUTION
The powerful magnetic field can influence the functioning and ope-
rational safety of electrical and electronical units.
CAUTION
Improper or incorrect maintenance work on the vacuum pump will
put the safety of operation at risk.
Risk of explosion !
It is strongly advised that any dismantling of the vacuum pump that
goes beyond the scope of what is described in this manual should
be done by specially trained Busch service staff only.
Fitting the magnetic coupling
Step 1
–
Carry out an inspection by measuring the length of the spacer (2).
This measurement must be 31,5 mm.
–
Fit the spacer (2), and position the shaft key (5) as well as the inner
part of the magnetic coupling (1) onto the rotor shaft.
–
Measure the distance between the face of the magnetic coupling's
inner rotor (1) and the supporting face of the cover (4). This value
(x) must be 99,5 mm.
–
Use the washer (3) and the screw (6) to fix axially.
Step 2
–
Fit the adapter flange (7) with its o-ring (8) into the housing (4)
using the two fixing screws (11)
–
Screw and glue the two guiding rods (10) onto the adapter flange
(7).
–
Fit the ceramic bell housing (9) of the coupling with its o-ring (15)
onto the adapter flange (7).
COBRA Vacuum Pump with Magnetic Coupling
Maintenance
0870549497 (EN)
Page 5
X
X= 99,5 mm
217 mm
4
5
2
1
3
6
