MacDon FD75 OM - Manual (Page 180)

OPERATION
NOTE:
Always be sure there is a minimum 1/8 in.
(2–3mm) clearance (A) between frame and back
of bell crank lever.
NOTE:
Float should be checked after levelling header.
Refer to
Checking and Adjusting Header Float,
page 138 .
Figure 4.253: Bell Crank
169894 166 Revision A