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5.9 O
Sensor Replacement
2
Be sure to perform all of the checks lsted n Secton 4.13.13 to ensure that
the O
sensor needs to be replaced.
2
Material Required: • Oxygen Sensor, P/N 24-8106
Procedure:
1. Dsassemble the analyzer as follows:
a. Remove the battery cover and the batteres, uncoverng one of
the cover hold-down screws.
b. Remove and set asde all four cover hold-down screws.
c. Wth the analyzer on ts back, remove the front cover, layng t
face down to the left of the body.
d. Carefully remove the crcut board, slppng off the battery con-
nector on top, and then layng the crcut board face down n the
top cover.
2. Slp off the oxygen sensor's electrcal connector from the crcut
board. Then push down; twst counterclockwse; then pull the oxy-
gen sensor out of ts socket (see Fgure 5-4).
Tip: To obtain a better grip on the oxygen sensor, it may be necessary
to remove the screw that secures the sensor socket to the case.
3. Usng the old sensor as a gude, remove the paper backng from the
new sensor gasket contaned n the replacement kt, and adhere t to
the new sensor.
4. Dspose of the old oxygen sensor n a proper manner (see the n-
structon sheet that comes wth the new sensor).
5. Mount the new oxygen sensor n ts socket. If the sensor socket was
removed n Step 2, re-attach t to the case.
6. Plug the oxygen sensor's electrcal connector nto the prnted crcut
board (observe polarty, see Fgure 5-5), and then reassemble the
analyzer.
Note: The sensor may take several hours to stabilize after
being connected to the printed circuit board.
Instruction 24-9395
Fyrite Pro
• #1 Phllps Screwdrver
(Model 110/120/125)
49
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