Emerson 8800 Assemble O2 Sensor and Heater Strut Assembly, Install Sample and Exhaust Tubes

OCX 8800

Instruction Manual

IM-106-880, Rev 1.0 January 2007

Figure 6-12. COe Sensor and
Pre-Heater Alignment	COe
	SENSOR ASSEMBLY
THERMOCOUPLE	TOP VIEW
	COe Sensor
	Flat
	Sensor
	Holder
	Sensor	Pre-Heater
		Flat
	Holder
	Flat
		Sensor
		Holder
2 to 2-1/4 in.		Flat
(51 to 57 mm)

37390034

7.Install COe sensor (3), lockwashers (2), and screws (1). Rotate flat of COe sensor (3) to center of sensor holder (4).

8.Align COe sensor flat parallel to sensor holder flat, as shown in Figure 6-12.Tighten screws (1, Figure 6-11).

9.If replacing thermocouple adaptor (6), apply anti-seize to the pipe threads. Install and tighten thermocouple adaptor.

Assemble O2 Sensor and Heater Strut Assembly

1.See Figure 6-10.Assemble O2 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 O2 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 O2 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 O2 cell.

Install Sample and Exhaust Tubes

1.See Figure 6-9.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).

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