9.4.13 Install O
2
Cell and Heater Strut Assembly
1. Rub a small amount of anti-seize compound on both sides of new gasket (10, Figure 9-
22).
2. Apply anti-seize compound to threads of O
2
cell and heater strut assembly (9) and
sensor housing (8).
Stripped threads on the O2 cell and heater strut assembly can allow gas leakage. Gas
leakage can affect the O2 measurements and calibration. Avoid over-tightening the O2
cell and heater strut assembly.
3. Install O
2
cell and heater strut assembly (9) in sensor housing (8). Snug up, but do not
over-tighten the assembly.
4. Reconnect the lead wires from O
2
cell, heater, and thermocouple to the sensor housing
terminal blocks. Refer to Figure 9-23.
5. Install reference air tube (7, Figure 9-22) in sensor housing (8). Make sure that the open
end of reference air tube extends into heater tube of O
2
cell and heater strut assembly
(9).
9.4.14 Install Terminals Insulator and Cover
1. Install insulator (6, Figure 9-22) over uppermost terminal blocks. Position one side of
insulator against terminal blocks and snap terminal marking plate (5) to mating stand-
off.
2. Position opposite side of insulator (6) and secure with related marking plate (5).
3. If removed, install cover gasket (4). Screw cover (3) onto sensor housing (8). Tighten
cover firmly.
4. Align locking clip (2) with gap between cover ribs.
5. Loosen screw (1) and slide locking clip (2) fully into gap between cover ribs. Retighten
screw (1).
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