MacDon D65 Operator's Manual page 257

Symptom
Excessive header
vibration
Knife back breakage
Excessive breakage
of knife sections or
guards.
147725
TROUBLESHOOTING
Problem
Knife hold-downs not
adjusted properly
Knives on double-knife
drive not timed
Knife not operating at
recommended speed
Excessive knife wear
Loose or worn knifehead
pin or drive arm
Bent cutterbar
Bent or broken guard
Worn knifehead pin
Dull knife
Knife hold-downs not
adjusted properly
Cutterbar operating too low
in stony conditions
Float is set too heavy
Bent or broken guard
Header angle too steep
Solution
Adjust hold-downs
Adjust knife timing
Check engine speed of
windrower
Replace knife
Tighten or replace parts
Straighten cutterbar
Straighten or replace
Replace
Replace
Adjust hold-downs
Raise cutterbar, using
skid shoes
Adjust for lighter float
Straighten or replace
Flatten header angle
243
Section
Checking Knife
Hold-Downs, page 136
Adjusting Double-Knife
Timing, page 156
Refer to your windrower's
operator's manual
• 5.5.2 Removing Knife,
page 129
• 5.5.5 Installing Knife,
page 130
• 5.5.3 Removing
Knifehead Bearing, page
129
• 5.6.1 Knife Drive Box,
page 140
See your MacDon Dealer
5.5.7 Knife Guards, page
131
5.5.3 Removing Knifehead
Bearing, page 129
• 5.5.2 Removing Knife,
page 129
• 5.5.5 Installing Knife,
page 130
Checking Knife
Hold-Downs, page 136
Cutting On the Ground,
page 53
3.7.2 Header Float, page
55
5.5.7 Knife Guards, page
131
Controlling Header Angle,
page 55
Revision A