2. With two hands or a strap wrench, turn the cover counterclockwise to
loosen. Unthread and remove the cover.
3. Inspect the cover O-ring for wear or damage. Replace the cover O-ring if
damaged.
4. Unsnap terminal marking plates and remove terminal insulator.
Remove O
2
cell and heater strut assembly
Refer to Figure 10-8.
Procedure
1. Remove reference air tube from sensor housing.
2. See Figure 10-8. Disconnect and tag O
2
heater wires, O
2
cell and return
wires, and thermocouple wires at the sensor housing terminals.
Manual Maintenance and service
00809-0500-4880 December 2022
Rosemount OCX8800A 251
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