214683 95 Revision A
Checking Knife Speed
DANGER
To avoid bodily injury or death from unexpected start-up of machine, always stop engine and remove key
from ignition before leaving operator’s seat for any reason.
Figure 3.98: Left Endshield
1. Stop the engine, and remove the key from the ignition.
2. Open the left endshield. For instructions, refer to
Opening Endshields, page 33.
WARNING
Check to be sure all bystanders have cleared the area.
3. Start the engine, engage the header drive, and run the combine at operating rpm.
4. Run float module and header for 10 minutes to warm up oil to 38°C (100°F).
Figure 3.99: Knife Drive Pulley
5. Measure the rpm of the knife drive box pulley (A) with a
hand-held tachometer.
6. Shut down the combine.
7. Compare pulley rpm measurement with the rpm values
in the knife speed chart. Refer to 3.7.9 Knife Speed
Data, page 94.
8. Contact your MacDon Dealer if the pulley rpm
measurement exceeds the specified rpm range for your
header.
3.7.10 Reel Height
The reel operating position depends on the type of crop and cutting conditions. Set the reel height and fore-aft
position to carry material past the knife and onto the drapers with minimal damage to the crop. Refer to 3.7.11 Reel
Fore-Aft Position, page 99.
The reel height is controlled manually or with button presets on the ground speed lever (GSL) in the combine cab.
Refer to your combine operator’s manual for instructions on controlling reel height or setting up auto reel height
OPERATION
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