
Service and Maintenance
Installation and Operation Manual - COMTEC
®
6000
40
Doc.-ID: COM6000_11022020_EN
5.9
Replacing the O
2
Sensor
Warning hot surface
The probe may only be removed with heat-insulated gloves. Before removing the probe, always switch off
the supply voltage to the electronic system. After removal, store the probe in a safe, protected place and
wait until it has cooled down below 35°C/95°F.
Take the probe out of the protection tube and
wait until it has cooled down.
Dismantle the probe inner part. (
See 5.8
)
Unscrew the filter head and dismantle the test
gas distributor with guide tube
,by loosening
the two allen screws.
Now remove the 4 Allen
screws at the Measur-
ing cell flange and remove the measuring cell
of the probe tube
Also carefully remove the old measuring flange
gasket
Figure 35
-
Mounting the O
2
Sensor (KES600x)
Clean the flange at the probe tube with fine sandpaper. Install the new cell with a new metal gasket and four new
screws at the measuring cell flange of the probe tube.
Insert the probe inner parts and ensure that the inner parts do not bind in the tube.
Press the locking bolt against the spring, so that the inner parts assembly is pressed against the measuring cell with
enough spring tension. Tighten locking bolt and connect the wires: