MacDon FD75 OM - Manual (Page 417)

TROUBLESHOOTING
Symptom Problem Solution Section
Knife hold-downs not
adjusted properly
Adjust hold-downs
Knife Hold-Downs, page
309
Cutterbar operating too low
in stony conditions Raise cutterbar, using skid
shoes Cutting On the Ground,
page 55
Float is set too heavy
Adjust float springs for
lighter float 4.7.3 Header Float, page
137
Bent or broken guard Straighten or replace guard
6.8.7 Knife Guards, page
304
Excessive breakage
of knife sections or
guards
Header angle too steep Flatten header angle
4.7.4 Header Angle, page
145
Bent or broken guard Straighten or replace guard
6.8.7 Knife Guards, page
304
Worn knifehead pin Replace knifehead pin
6.8.3 Removing Knifehead
Bearing, page 302
Knife back breakage
Dull knife Replace knife
6.8.2 Removing Knife,
page 302
and 6.8.5
Installing Knife, page 303
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