Operating Primary Extractor

NW270990-UN-15MAY06

NW270980-UN-15MAY06

A - Wear

B - Dirt

1. Performance decreases as fan blades wear. Blades should always be replaced before they are badly worn. Always be sure to have a balanced set of four new blades before changing worn blades. See Service Section for procedure.
2. Vibrations in the extractor area of the harvester should be monitored continuously. As blades wear, the fan will become unbalanced and will vibrate. Running an unbalanced fan can cause severe damage to the harvester. Change all four blades if the set becomes unbalanced.
3. When using the variable speed primary extractor, set the RPM of the fan when entering a new block of cane. The proper setting allows debris to be extracted without the billets. Pay attention to the sound the billets make as they hit the extractor hood. This should indicate if fan speed is too high.
4. Debris should always be removed from fan blades immediately to get maximum cleaning ability.
5. Built-up dirt and cane debris should be cleaned regularly from hood and wear ring.
6. Keep rotating extractor hood ring lubricated.

NOTE: The fan speed will change as harvesting conditions change. For example, the amount of moisture in the cane, and the cane variety and yield will all affect the fan speed. To maintain proper cleaning in all fields, fan speed should be monitored periodically throughout the day.