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169441
88
Revision D
3.17
Knifehead Shield
The knifehead shield attaches to the endsheet and reduces the knifehead opening to prevent cut crop from accumulating
in the knifehead cutout.
It is recommended that the shield(s) be installed when harvesting severely lodged crop or any crop condition where
plugging occurs at knife head cut-out.
IMPORTANT:
Remove the shields when cutting with the cutterbar on the ground in muddy conditions. Mud may pack into the cavity
behind the shield which could result in knife drive box failure.
Different shields are available for different header sizes. Be sure to use the correct shield for your header. For more
information, refer to
5.2.2 Knifehead Shield, page 247
The shields and mounting hardware are available from your MacDon Dealer.
3.17.1
Installing Knifehead Shield
DANGER
To prevent bodily injury or death from the unexpected start-up of the machine, always stop the engine and remove the
key from the ignition before making adjustments to the machine.
WARNING
To prevent bodily injury from the fall of a raised reel, always engage the reel safety props before going under the
raised reel for any reason.
CAUTION
Wear heavy gloves when working around or handling knives.
1.
Raise the reel fully.
2.
Lower the header fully.
3.
Shut down the engine, and remove the key from the ignition.
4.
Engage the reel safety props. For instructions, refer to
3.10.1 Engaging Reel Safety Props, page 36
1001137
A
B
Figure 3.86: Knifehead Shield
5.
Place knifehead shield (A) against the endsheet as shown.
Align the shield so the cutout matches the profile of the
knifehead and/or hold-downs.
6.
Bend knifehead shield (A) along the slit to conform to the
endsheet.
7.
Align the mounting holes and secure with two
3/8 in. x 1/2 in. Torx
®
head bolts (B).
8.
Tighten bolts (B) just enough to hold knifehead shield (A) in
place while allowing it to be adjusted as close to the
knifehead as possible.
9.
Manually rotate the knife drive box pulley to move the
knife and check for areas of contact between the knifehead
and knifehead shield (A). Adjust the shield to eliminate
interference with the knife if necessary.
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