Emerson Rosemount OCX 8800, Instruction Manual

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Instruction Manual
IM-106-880C, OI
Repair Sensor
Housing
April 2017
Assemble O2 Sensor and Heater Strut
Assembly
20
5
9.4.8 Assemble O
2
Sensor and Heater Strut Assembly
1. See Figure 9-14 . Assemble O
2
cell (2), gasket (5), and heater tube (3). Make sure
the test gas passage holes line up with each other in all components.
2. Apply a small amount of anti-seize compound to the screw threads and use screws (1)
to secure assembly. Torque to 35 in-lbs (4 N·m).
3. Carefully slide O
2
heater strut assembly (9) into heater tube (3).
4. Press down on the back plate of strut bracket (12) to ensure spring (11) tension is
present to hold contact pad against O
2
cell (2).
5. Secure strut bracket (12) and return wire (8) with four screws (6) and lockwashers (7).
Make sure return wire (8) is tightly fastened. This is the ground side connection for the
O
2
cell.
9.4.9 Install Sample and Exhaust Tubes
1. See Figure 9-13 . Apply pipe thread sealant (Loctite #567) to the replacement sample
tube (2) or exhaust tube (3) pipe threads. Do not apply sealant to the first turn of the
pipe threads.
2. Thread the sample tube (2) or exhaust tube (3) into the housing (1). Use a pipe wrench
to tighten the tube.
3. If used, install and tighten in situ filter (4).