Manually Checking Voltage Range - MacDon FFT FD75 Assembly Instructions Manual

Manually Checking Voltage Range

The output voltage range of auto header height control (AHHC) sensors in some combines can be checked from
cab. For instructions, refer to your combine operator's manual or AHHC instructions later in this document.
To manually check sensor's output voltage range, follow these steps:
1. Position header 150 mm (6 in.) above ground, and unlock adapter float.
2. Check that float lock linkage is on down stops
(washer [A] and nut [B] cannot be moved) at both
locations.
NOTE:
If header is not on down stops during next two steps,
voltage may go out of range during operation causing a
malfunction of AHHC system.
3. Adjust cable take-up bracket (B) (if necessary) until
pointer (A) on float indicator is on 0.
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SETTING UP AUTO HEADER HEIGHT CONTROL
141
Figure 5.2: Float Lock
Figure 5.3: Float Indicator Box (Most Common 5
Volt AHHC Sensor Assembly Shown)
Revision A