TROUBLESHOOTING
7.2 Cutting Action and Knife Components
Symptom
Problem
Solution Section
Knife hold-downs not
adjusted properly
Adjust hold-downs
Checking Knife
Hold-Downs, page 308
Knife secti
ons or guards
arewornorb
roken
Replace all worn and
broken cutting parts
5.8 Knife, p
age 299
Knife is not operating at
recommended speed
Check engine speed
of combine
Refer to the combine
operator’s manual
Ground speed too fast for
reel speed
Reduce ground speed or
increase reel speed
• 3.7.4 Reel
Speed, page
67
• 3.7.5 Gro
und Speed,
page 68
Reel fing
ers not lifting crop
properl
y ahead of knife
Adjust reel
position/finger pitch
• 3.7.9 Reel Fore-Aft
Position, page 73
• 3.7.11 Reel Tine Pitch,
page 80
Cutter
bar too high Lower cutting height
3.7.1 C
utting Height, page
52
Header angle too flat Steepen header angle
3.7.3 Header Angle, page
66
Bent
knife causing binding
of cu
tting parts
Stra
ighten bent knife and
alig
n guards
Cutting edge of guards not
close enough or parallel to
knife sections
Align guards
5.8.7 Knife Guards, page
303
Tangled/tough-to-cut crop
Install stub guards
•See
your MacDon
De
aler
• Ch
ecking Knife
Ho
ld-Dow ns, page 308
• 6.
2.3StubGuard
Co
nversion Kit, page
4
10
Reel too far back Move reel fo rwa rd
3.7.9 Reel Fore-Aft
Position, page 73
Ragged or uneven
cutting of crop
Loose knife drive belt
Adjust drive belt tension
5.9.2 Knife Drive Belts,
page 318
147695 419 Revision A
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