214323
524
Revision B
Problem
Solution
Refer to
Steel pick-up fingers contacting knife
Increase reel clearance to cutterbar or
adjust
“
frown
”
•
6.13.1 Reel Clearance to Cutterbar,
page 464
•
Float too heavy
Adjust springs for lighter float
Mud or dirt build-up on cutterbar
Raise cutterbar by lowering skid shoes
Mud or dirt build-up on cutterbar
Install cutout sections
Installing Knifehead Shield, page 416
Mud or dirt build-up on cutterbar
Flatten header angle
Knife is not operating at
recommended speed
Check engine speed of combine
Refer to combine operator
’
s manual
Knife hold-downs not adjusted
properly
Adjust hold-downs
Checking and Adjusting Knife Hold-
Downs, page 410
Knife not operating at recommended
speed
Check engine speed of combine
Refer to combine operator
’
s manual
Excessive knife wear
Replace knife
•
6.8.2 Removing Knife, page 400
•
6.8.5 Installing Knife, page 402
Loose or worn knifehead pin or drive
arm
Tighten or replace parts
6.8.1 Replacing Knife Section, page
399
Symptom: Excessive vibration of adapter and header
Incorrect knife speed
Adjust knife speed
Driveline U-joints worn
Replace U-joints
See your MacDon Dealer
Bent cutterbar
Straighten cutterbar
See your MacDon Dealer
Summary of Contents for FD75
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