Instruction manual

5.7 Change the head-plate felt filter
If you have not connected an external pump to evacuate the bearing end-cover (see Section 3.10),
you must change the felt filter in the head-plate annually. As you must remove the bearing
end-cover to replace the felt filter, it is convenient to carry out this maintenance when you
relubricate the rotor bearings (see Section 5.6). Use the following procedure to change the filter;
this procedure assumes that you have already carried out Steps 1 to 5 in Section 5.6.
1. Refer to Figure 4. Use a suitable tool to prise out the felt filter (4) from the high vacuum
head-plate. Dispose of the filter (see Section 6).
2. Place the new felt filter (supplied in the maintenance kit) into the head-plate.
3. Refit the end-cover (1) to the pump as described in Step 7 of Section 5.6.
DP180 Dry Vacuum Pump 25
Figure 11 - Rotor bearing relubrication
1. Bearing end-cover
2. Screw
3. 'O' ring
4. Felt filter
5. Bearing
6. End-cover cavity