The 2966-004 Air Adjust Row Cleaner for John Deere 60/90 Openers allows growers to adjust the up and down pressure of the row cleaners from the tractor seat with the push of a button. This unit effectively moves the desired amount of residue and allows growers to quickly respond with adjustments for changing field conditions. The 2966-002A Air Adjust Row Cleaner uses the same control system as the 2940 Air Adjust In-Cab Controller, as well as the 2940 Air Adjust Pneumatic Controller Kit and Compressor Kit. - Less