3. Loosen the screw of the filter springs to relieve tension in the springs.
4. Remove the filter springs.
5. Pull the exhaust filter out of the operating fluid separator.
– If necessary, remove the filter supports.
7.4.2 Mounting the exhaust filters
Prerequisites
● Vacuum pump switched off
● Vacuum pump vented to atmospheric pressure
● Vacuum pump cooled
Required consumables
● Maintenance kit – Maintenance level 1
Required tools
● Allen key,
WAF 6
● Socket key,
WAF 10
● Flat-head screwdriver
● Calibrated torque wrench (tightening factor ≤ 2.5)
2
3
6
4
5
7
8
10
9
1
Fig. 21:
Mounting the exhaust filters
1 Operating fluid separator
6
Screw (4x)
2 Exhaust filter
7
Filter material
3 Filter springs
8
Flat seal
4 O-ring
9
Filter support
5 Separator cover plate
10
Screw (12x)
Procedure
1. Check whether the o-rings are seated on the face side of the exhaust air filters.
2. Mount the exhaust filters using the filter springs.
– The arrow on the filter indicates the installation orientation. The arrow must point upwards (
↑
).
3. Ensure correct seating of the filter springs.
4. Tighten the screws of the filter springs.
5. Insert the new filter material into the separator cover plate.
6. Fit the separator cover plate with new flat seal.
7. Tighten the screws on the separator cover plate evenly.
– Tightening torque:
21 Nm
.
During operation, the new exhaust filter becomes saturated with oil. It is therefore normal for the operat-
ing fluid fill level to drop slightly after the filters were changed.
7.5 Cleaning the intake strainer
The intake strainer in the vacuum connection upper section must be cleaned:
● when the throughput decreases
● if there is visible contamination
Maintenance
46/70
