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Revision B
8.2
Cutting Action and Knife Components
Problem
Solution
Refer to
Symptom: Ragged or uneven cutting of crop
Knife hold-downs not properly
adjusted
Adjust hold-downs
•
5.5.8 Knife Hold-Downs, page 141
•
Downs with Pointed Guards, page
141
•
Down at Double-Knife Center
Pointed Guard, page 142
•
Down with Stub Guards, page 143
Knife sections or guards are worn
or broken
Replace all worn and broken
cutting parts
5.5.8 Knife Hold-Downs, page 141
Knife is not operating at
recommended speed
Check engine speed of windrower
Refer to the windrower
operator
’
s manual
Ground speed too fast for reel speed
Reduce ground speed or increase
reel speed
•
•
Reel fingers not properly lifting crop
ahead of knife
Adjust reel position and/or
finger pitch
•
3.7.9 Reel Fore-Aft Position, page
67
•
3.7.10 Reel Tine Pitch, page 68
Cutterbar too high
Lower cutting height
Header angle too flat
Steepen header angle
Bent knife causing binding of
cutting parts
Straighten bent knife, and align guards
Cutting edge of guards not close
enough or parallel to knife sections
Align guards
Tangled crop tough to cut
Install stub guards
•
•
6.2.4 Stub Guard Conversion Kit,
page 247
•
See your MacDon Dealer
Reel too far back
Move reel forward
3.7.9 Reel Fore-Aft Position, page 67
Loose knife drive belt
Adjust drive belt tension
•
Checking and Tensioning Untimed
Double-Knife Drive Belts, page 160
•
Symptom: Knife plugging
Reel too high or too far forward
Lower reel or move reel rearward
•
•
3.7.9 Reel Fore-Aft Position, page
67
Ground speed too slow
Increase ground speed