Installing Knifehead Bearing; Installing Knife - MacDon D65 Operator's Manual

5.5.4 Installing Knifehead Bearing

The knifehead bearing, seals, and greasing interval protect the knifehead from the forces of the knife drive output arm. The
seals and bearing require inspection and, when worn—replacement to prevent damage.
1. Place O-ring (E) and plug (D) into the knifehead.
IMPORTANT:
Install the bearing with the stamped end (the end with the
identification markings) facing up.
NOTE:
It may be necessary to temporarily remove the grease
fitting from the knifehead during installation of the
knifehead pin. This will allow any trapped air to escape and
the knifehead pin will seat correctly.
2. Use a flat-ended tool with the same approximate diameter
as bearing (C), and push the bearing into the knifehead
until the top of the bearing is flush with the step in the
knifehead.
3. Install seal (B) into the knifehead with the lip facing
outwards.
IMPORTANT:
To prevent premature knifehead or knife drive box failure,
ensure there's a tight fit between knifehead pin (A) and the
needle bearing, and also between the knifehead pin and
the output arm.
4. Install the knife. For instructions, refer to

5.5.5 Installing Knife

The cutterbar knife is designed to easily be replaced if worn or damaged. A spare knife can be stored in the header
frame tube.
DANGER
To prevent bodily injury or death from the unexpected start-up or fall of a raised machine, always stop the engine and
remove the key before leaving the operator's seat, and always engage the safety props before going under the
machine for any reason.
WARNING
Stand to the rear of the knife during removal to reduce the risk of injury from cutting edges. Wear heavy gloves when
handling the knife.
1. Raise the header fully.
2. Shut down the engine, and remove the key from the ignition.
3. Engage the header safety props. For instructions, refer to the windrower operator's manual.
4. Slide the knife into place and align the knifehead with the output arm.
5. For ease of removing or installing the knifehead pin, remove the grease fitting from the pin.
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MAINTENANCE AND SERVICING
Figure 5.30: Knifehead Bearing Assembly
5.5.5 Installing Knife, page
141
B
D
141.
A
C
E
Revision B