MacDon FFT FlexDraper FD75 - Page 437

TROUBLESHOOTING
Symptom
Problem
Solution Section
Knife hold-do
wns not
adjusted prop
erly
Adjust hold-downs
Checking Knif
e
Hold-Downs, p
age 308
Knife not operating at
recommended speed
Check engine speed
of combine
Refer to combine
operator’s manual
Excessive knife wear Replace knife
• 5.8.2 Remov
ing Knife,
page 301
• 5.8.5 Insta
lling Knife,
page 302
Excessive header
vibration
Loose or worn knifehead
pin or drive arm
Tighten or replace parts
5.8.1 Replacing Knife
Section, page 299
Incorrect knife speed Adjust knife speed 3.7.7 Knife Speed, page 71
Driveline U-joints worn Replace U-joints
See your
MacDon Dealer
Excessi
ve vibration of
adapter
and header
Bent cutterbar
Straighten cutt erb ar See your MacDon Dealer
Knife hold-downs not
adjusted properly
Adjust hold-downs
Checking Knife
Hold-Downs, page 308
Cutte
rbar operating too low
in sto
ny conditions
Raise cutterbar, using
skid shoes
Cutti
ng On the Ground,
page 5
6
Float is set too heavy
Adjust float springs for
lighter float
3.7.2 Header Float, page
58
Bent or broken guard
Straighten or replace guard
5.8.7 Knife Guards, page
303
Excessive breakage
of knife sections or
guards
Header angle too steep Flatten header angle
3.7.3 Header Angle, page
66
Bent or broken guard
Straighten or replace guard
5.8.7 Knife Guards, page
303
Worn knifehead pin Replace knifehead pin
• 5.8.3 Removing
Knifehead Bearing, page
301
• 5.8.4 Installing
Knifehead Bearing, page
302
Knife back breakage
Dull kn ife Replace knife
• 5.8.2 Removing Knife,
page 301
• 5.8.5 Installing Knife,
page 302
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Revision A