MacDon FD75 OM - Manual (Page 208)

HEADER ATTACHMENT/DETACHMENT
16. Pull back collar (A) on end of driveline, and push onto
combine output shaft (B) until collar locks.
Figure 5.10: Combine Output Shaft
17. Disengage both adapter float locks by moving latch (A)
away from adapter, and moving lever (B) at each lock
to lowest position.
Figure 5.11: Float Lock
169894 194 Revision A