Maintenance
17
Remove the operating fluid return line 27, if installed.
Unscrew screws 45 and remove cover 2 with the filter elements from casing 100, col-
lect remaining operating fluid and clean the parts if necessary;
– pay attention to flat seal 3.
Unfasten nuts 51, remove washer 52, pressure piece 11, O-ring 65 and filter cover 6
being careful with seal 12.
Replace filter elements 14; cleaning is not recommended in most cases.
Dismantling the pressure relief valve
Remove screw 47, dismantle valve casing 7 with the valve buffer 9 and compression
spring 8.
Clean all parts and inspect for wear.
Check the sealed surface of valve buffer 9; replace if necessary.
– When assembling lightly oil valve buffer and ensure the correct seating in the valve
casing 7.
Cleaning
Only the filter elements in the C version can be cleaned; the elements in the standard
version must be replaced. The success of the cleaning process depends on the process
medium being used, and should be tested by the user for the specific situation.
Clean the filter insert in a solvent bath.
Use blasts of compressed air to expel the cleaning agent from the filter element, and
then dry them.
Assembling
Assembling
is carried out in reverse order.
Tighten the filter elements at a torque of 3 ... 5 Nm.
– Ensure the correct seating of the seal 12.
Check the pump's ultimate pressure to ensure a leakproof assembly of the operating
fluid return line;
– compare the measurement result with the previously determined ultimate pressure.
Fill in additional operating fluid in OME in order to ensure the return of operating fluid.
WARNING
Explosion hazard
The use of volatile or combustible cleaning agents in vacuum systems can lead to ex-
plosive vapour-air mixtures.
After cleaning ventilate and let dry completely.
