MacDon FD75 OM - Manual (Page 238)

HEADER ATTACHMENT/DETACHMENT
Figure 5.86: Gleaner R and S Series
6. Raise handle (A) to release coupler (B) from adapter.
Figure 5.87: Adapter Coupler
7. Push handle (A) on combine to full open position.
8. Clean mating surfaces of coupler (B) and receptacle
if necessary.
Figure 5.88: Combine Receptacle
169894 224 Revision A