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Place the knife section, 1, over the bolts and install
a lock nut on each bolt.
Torque the lock nuts to a maximum of 8-11 N⋅m
(70-100 inch pounds).
GUARD MAINTENANCE AND
ADJUSTMENT
WARNING
Disengage the PTO, turn off the tractor engine
and remove the key. Wait for all movement to
stop before leaving the operator's position.
Never adjust, lubricate, clean or unplug machine
with the engine running. Failure to comply could
result in death or serious injury.
The main purpose of the guards, 1, is to protect the
knife, 2. However, they also have several other
functions. They help lift and separate the crop. They
have a ledger surface that together with the knife
section acts as a shear to cut the crop. They help
guide the knife back and also help keep trash from
building up on the knife back.
Replace worn or dull guards promptly. A guard
should be replaced when the corners of the
ledger surface become rounded or dull.
SPECIAL GUARDS
End Guards
The Model 499 uses several special guards. The
guards at each end of the cutter bar have the top lip,
1, shortened to clear the knife drive rocker arms. The
channel, 2, for the knife back is deeper to clear the
nuts on the knife head bolts. The outer part of the
trash bar at 3 is removed to prevent running down
crop. The bar is removed from both sides of the guard
so that the same part can be used in either the left or
right end of the cutter bar.
NOTE: Do not use a regular guard in place of the
special end guards. The knife drive arms may be
damaged.
SECTION 4 - MAINTENANCE
tc36
4837-16
4-21
2
1
1
3
2
1
28
29
3
30
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