MacDon FD75 OM - Manual (Page 158)

OPERATION
NOTE:
The following steps are only required if the above
has not worked.
3. Remove the linkage cover. Refer to Removing Linkage
Covers, page 40 .
4. Retrieve the supplied torque wrench (A) that is stored
on the adapter frame on the right-hand side.
Figure 4.213
5. Place the torque wrench (A) on bolt (B) and use it to
move the wing until the lock disengages.
6. Replace the torque wrench (A) and reinstall the linkage
cover.
7. The wings should now freely move up and down with
equal hand force and the cutterbar should be straight.
Otherwise, the wings are not balanced.
8. If necessary, balance the wing. Refer to 6.14 Checking
and Adjusting Header Wing Balance, page 390 .
Figure 4.214
Operating In Rigid Mode
The three sections will be locked and operate as a rigid cutterbar.
Lock the wings as follows:
1. Move spring handle (A) in the upper slot to lock the
wing. The locking should be audible.
2. If the lock link does not engage, move the wing by
raising and lowering the header, changing the header
angle, or driving the combine until it engages.
Figure 4.215: Wing Lock
169894 144 Revision A