SECTION 58 -- ATTACHMENTS AND HEADERS -- CHAPTER 2
58-5
KNIFE AND BOLT INSPECTION
Inspect the cutter bar daily for damaged compo-
nents. The quality of cut and safety of operation de-
pends on regular inspection of the cutter bar. Check
the discs, knives, and hardware systematically for
wear, damage or loose components.
Operating over rough terrain and rocky conditions
can cause the knives to crack or deform leading to
cutting problems, increase of safety risks, and pos-
sible cutter bar damage.
NOTE: Striking an object can cause knife hardware
to loosen. If an obstacle is struck, STOP!, check all
hardware and retighten.
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The knives must be replaced or turned over to a new
cutting edge on a timely basis to maintain good cut-
ting performance. Dull knives will require more
horsepower to cut the crop and will leave a ragged
stubble.
Replace the knives if they are bent, severely worn, or
if the hole is elongated. Replace the knife bolt if wear
is found or if it can be threaded into the knife nut by
hand.
The knives shown in this figure are: knife, 1, is new;
knife, 2, worn requires turning; knife, 3, requires
replacement.
NOTE: The knife bolts have a lock patch on them. If
the knife nuts can be threaded into the knife nut by
hand, replace the bolt.
When a knife or securing hardware is in question, re-
place it.
WARNING
Replace cracked or severely deformed knives
immediately to prevent an accident.
Replace the knife nut if the shoulder or threads show
wear.
Rotate the bolt protectors to a new area when chang-
ing knives and replace them if they are worn around
the full circumference.
If the cutter bar cannot be turned by hand due to ma-
terial build-up under the discs, start the tractor and
operate the PTO at 1/3 rated speed for 30 seconds.
Shut the tractor off and recheck. If the cutter bar still
cannot be turned by hand, it will be necessary to re-
move the discs and clean out the material buildup.
CAUTION
Be sure that all cutter bar shields are down and
cover skirts snapped together before operating
unit.
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