214683 461 Revision A
Figure 5.130: Knifehead
12. Install grease fitting (A) into the knifehead pin, and turn
the grease fitting for easy access.
13. Slowly apply grease to the knifehead until slight
downward movement of the knifehead is observed.
IMPORTANT:
Do NOT overgrease the knifehead. Overgreasing leads
to knife misalignment causing excessive heating of
guards and overloading of drive systems. If
overgreasing occurs, remove the grease fitting to
release pressure.
Figure 5.131: Knife Drive Box
14. Tighten the knife drive box side bolts (A) first, then
tighten the bottom bolts (B). Torque to 271 Nm
(200 lbf·ft).
15. Move the output arm to the mid-stroke position, and
ensure the knife bar doesn’t contact the front of the first
guard. If the knife drive box requires adjustment,
contact your MacDon Dealer.
16. Install and tension the knife drive belts.
• For untimed belts, refer to Checking and Tensioning
Knife Drive Belts, page 464.
17. Close the endshield. Refer to Closing Endshields, page
34.
Changing Oil in Knife Drive Box
WARNING
To avoid bodily injury or death from unexpected startup of machine, always stop engine and remove key
before making adjustments to machine.
Change the knife drive box lubricant after the first 50 hours of operation and every 1000 hours (or 3 years)
thereafter.
1. Shut down the combine, and remove the key from the ignition.
2. Raise the header and place a container large enough to hold approximately 2.2 liters (2.3 quarts) under the
knife drive box to collect the oil.
3. Open the endshield. Refer to Opening Endshields, page 33.
MAINTENANCE AND SERVICING
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