50
5
3
2
1
6
O2-SENSOR
4
O-RING
Figure 84. O2 Sensor replacement
4.
Inspect the sensor unit cavity, and if any sign of moisture clean it out with a Q tip or similar. Make sure that
the contact springs inside the sensor unit are intact. Be careful not to snag them with the Q tip.
5.
Carefully open the bag using a pair of scissors or a knife.
Make sure you don’t cut yourself or stab the sensor!
Make sure that there is no sign of any liquid in the bag, if so do not proceed, you need a new sensor. Be careful
that you don’t poke anything such as a fingernail through the membrane.
6.
Remove the plug or other device that acts as a shorting clip. This may be found on the connection plate on the
back of the sensor.
7.
Slide the sensor into the sensor unit (gold plated contact side of sensor should be facing up touching the sensor
unit contacts. The membrane side is covered by a convex gold plated mesh). Be careful not to touch the
membrane while doing this - if the membrane is punctured the sensor must be replaced.
8.
Verify that the sealing O ring is in place in the cell cap groove. Verify that the O ring and the cap are clean and
free of any particulate deposits (dirt).
