SERVICE MANUAL & ICA
8750 AMPHIBIAN/SEAPLANE FLOATS ON CESSNA 208/208B
P/N 1005723 Doc. No. W8750-24-01
Page 60 of 104
Revision C
4.4 ADJUST MAIN UP AND DOWN
POSITION SWITCHES
1.
With the aircraft still on jacks, position the
gear in the “UP” position. This allows
access to the gear down proximity switch.
2.
Loosen the jam nut on the Gear Down
Proximity Switch located on the back of the
Main Gear Top Mount. Thread the Gear
Down Proximity Switch in or out until the
face of the sensor is flush with the face of
the Main Gear Top Mount. Reference
Figure 4-4B. Tighten the jam nut on the
proximity switch to 10 +/- 3 inch-pounds.
3.
Thread out the Set Screw Adjustment (Item
6), located on the Top Arm Assembly (Item
2).
4.
Position the gear in the “DOWN” position.
With the aircraft master switch on, thus
providing power to the proximity switch,
thread the Set Screw Adjustment (located on
the Top Arm Assembly) in until the LED
light built into the proximity switch initially
illuminates with the gear arm in the full
down over center locked position, then
thread the set screw in an additional half
turn.
5.
Reposition the gear to the “UP” position.
6.
Loosen the jam nuts on the gear up
proximity sensor.
7.
Adjust the gear up proximity sensor switch
to have between a 0.030 - 0.060” gap
between the proximity sensor plate and the
proximity sensor. Tighten the jam nuts on
the proximity sensor to 10 +/- 3 inch-
pounds.
8.
At this point, check to insure that the built in
LED on the proximity sensor is illuminated
when the sensor plate is rotated in front of
the sensor.
9.
With the gear in the full up position, loosen
the AN6 bolt holding the proximity sensor
plate to the Main Gear Top Arm and the
socket head cap screw that prevents rotation
of the sensor plate.
10.
Rotate the sensor plate so that the sensor is
near the edge of the plate with the gear in
the up position. Reference Figure 4-5 inset.
11.
Tighten the AN6 bolt, socket head cap
screw, and re-safety AN6 bolt.