MacDon FD75 OM - Manual (Page 182)

OPERATION
4.10 Unplugging Adapter
To clear a plug from the adapter, follow these steps.
1. Stop forward movement of the machine, and disengage header drives.
2. Raise header slightly off the ground, and raise the reel.
3. Reverse the combine feed as per manufacturers specification (reverse feed varies for different combines) .
4. Re-engage header drive.
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