MacDon A40D - Removing Knife

262334 144 Revision A
1005828
B
A
Figure 4.18: Knife Section
2. Stroke the knife as required to expose the knife sections.
3. Remove lock nuts (A), and lift section (B) off of the bolts.
IMPORTANT:
Do NOT mix heavy and light knife sections on the
same knife.
4. Clean any dirt off of the back of the knife, and position the
new knife section onto the installed bolts.
5. Secure the knife with the lock nuts, and tighten the nuts to
the required torque specification.
4.8.2 Removing Knife
The cutterbar knife is designed to easily be replaced if worn or damaged. A spare knife can be stored in the lean bar.
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 the cutting edges. Wear heavy gloves
when handling a knife.
1. Lower the header onto blocks, or raise the header fully. Shut the engine off, and remove the key from the ignition. If
raising the header, engage the safety props.
2. Stroke the knife manually to its outer limit.
3. Clean the area around the knifehead.
1002952
A
B
C
Figure 4.19: Knifehead
4. Remove bolt (A).
5. Remove grease fitting (B) from the pin.
6. Use a screwdriver or chisel in slot (C) to release the load on
the knifehead pin.
7. Use a screwdriver or chisel to pry the pin upward in the pin
groove until the pin is clear of the knifehead.
8. Push the knife assembly inboard until it is clear of the
output arm.
9. Seal the knifehead bearing with plastic or tape unless it is
being replaced.
10. Wrap a chain around the knifehead and pull out the knife.
MAINTENANCE AND SERVICING