GA01300_0902 - 04/2006 - © by Leybold Vacuum
32
Maintenance
5.5
Cleaning the Dirt Trap
A wire-mesh sieve is located in the intake port of the pump to act as a dirt
trap for foreign objects. It should be kept clean to avoid a reduction of the
pumping speed.
For this purpose, remove the dirt trap (2/2) from the intake port and rinse it
in a suitable vessel with solvent. Then thoroughly dry it with compressed air.
If the dirt trap is defective, replace it with a new one.
The cleaning intervals depend on the application. If the pump is
exposed to large amounts of abrasive materials, a dust filter
should be fitted into the intake line.
5.6
Removing and Fitting the
Internal Demister
(not required for PFPE)
Required tools: Allen keys size 5 and 8
Required spare parts:
Gasket for oil case
200 10 737
Internal demister:
D 16 BCS
390 26 012
D 25 BCS
390 26 013
The internal demister is spring-mounted in a frame. When it is clogged, it
rises periodically to reduce the pressure difference created. The resultant
noise at high intake pressures indicates that the internal demister is dirty.
Periodically clean or replace the internal demister; the maintenance interval
depends on the application. Use a suitable solvent for cleaning.
Shutdown the pump and drain the oil (see Chapter 5.4).
Remove the
four recessed
screws (10/5) on the oil case (10/1). Don’t
remove the
non-recessed screws
; they hold the motor flange in place
and need not be removed.
Pull the oil case forward off the pump.
Remove the gasket (10/7).
Press the spring buckles (10/2) sideways away from the frame (10/4).
Lift off the frame and remove the internal demister (10/3).
Clean all parts and check that they are in perfect condition; if not, replace
them with new parts.
Reassemble in the reverse order.
Torque for the screws (10/5) is 5 Nm.
Caution
