MacDon FD75 OM User Manual
Page 417

Symptom
Problem
Solution
Section
Knife hold-downs not
adjusted properly
Adjust hold-downs
Cutterbar operating too low
in stony conditions
Raise cutterbar, using skid
shoes
Float is set too heavy
Adjust float springs for
lighter float
Bent or broken guard
Straighten or replace guard
Excessive breakage
of knife sections or
guards
Header angle too steep
Flatten header angle
Bent or broken guard
Straighten or replace guard
Worn knifehead pin
Replace knifehead pin
6.8.3 Removing Knifehead
Bearing, page 302
Knife back breakage
Dull knife
Replace knife
and
169894
403
Revision A
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