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Revision A
Replacing Auto Header Height Control (AHHC) Sensor
The auto header height control (AHHC) sensor/potentiometer sends a signal to combine allowing it to maintain a
cutting height and optimize float as header follows ground contours. To replace AHHC sensor, follow these steps:
Figure 5.135: AHHC Sensor
1.
Disconnect wiring harness from existing sensor (A).
2.
Remove two nuts and bolts (B) that secure sensor to
bracket and remove sensor (A).
IMPORTANT:
To avoid damaging new sensor, install sensor as
follows:
Figure 5.136: AHHC Sensor
3.
Position sensor control arm (A) against stop (B).
4.
Install new sensor (C) onto linkage arm with wiring plug
facing away from stop.
5.
Pretension sensor
’
s internal spring by rotating
sensor (C) until bolt holes align with holes on bracket.
Figure 5.137: AHHC Sensor
6.
Secure new sensor (A) to bracket with two nuts and
bolts (B).