MacDon D65 Operator's Manual page 261

Symptom
Excessive header
vibration
Knife back breakage
Excessive breakage
of knife sections or
guards.
169899
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.
249
Section
Checking Knife
Hold-Downs, page 149
Adjusting Double Knife
Timing, page 169
Refer to your windrower's
operator's manual
6.5.2 Removing Knife,
page 142
6.5.5 Installing Knife, page
143
Removing Knifehead
Bearing
6.6.1 Knife Drive Box, page
153
See your MacDon Dealer
6.5.7 Knife Guards, page
144
Removing Knifehead
Bearing
6.5.2 Removing Knife,
page 142
6.5.5 Installing Knife, page
143
Checking Knife
Hold-Downs, page 149
Cutting On the Ground,
page 53
4.7.2 Header Float, page
55
6.5.7 Knife Guards, page
144
Controlling Header Angle,
page 56
Revision A