Regeneration and You

This guide is designed to assist your understanding of the Kubota Regeneration process and is current as of August 2018. Kubota may change the Regeneration process and you should always follow the procedures outlined in the Operator’s Manual if this guide conflicts.

Dashboard Display

This is your tractor dashboard display. For regeneration, look to the 2 buttons on the left side just below the dash, and top 3 lights on the right side of the dash

Regeneration
Regeneration

There are 4 types of regeneration:

1. Natural Regeneration – this happens “naturally”, without operator input. For this type of regeneration to occur the tractor engine RPMs must be above 1650*, and the engine and Diesel Particulate Filter (DPF) both must get up to operating temperature. The Regeneration light on the right side, top of the dash display will flash to let you know regeneration is required, and regeneration is about to begin. The light will then glow solid yellow/amber when regeneration begins, and it will go out when regeneration is complete.

Natural Regeneration

What you must do: Nothing special, keep operating the tractor above 1650 RPMs until the light goes off.

2. Auto Regeneration - NEVER press the Inhibit button unless you are working in flammable environmen like a hay barn. To put your tractor into Inhibit Mode, press the left side button (the one with a slash through the Regeneration symbol). The button will glow to tell you the tractor is in Inhibit Mode.

Auto Regeneration
Auto Regeneration

For automatic Regeneration to take place, the tractor must NOT be in Inhibit Mode. If that button is glowing, press it again to turn off Inhibit Mode. Also, turn off extraneous electrical items: Heat/AC, phone charger, lights, etc.

When the tractor needs to regenerate, the Regenerate button will FLASH to let you know it’s getting ready to begin.

Auto Regeneration

If the engine RPMs are below 1650*, the engine RPM light (boxed in white) will also flash.

Auto Regeneration

If the engine RPM light (boxed in white) flashes, advance the throttle to at least 1650* RPMs.

Your tractor will now go into regeneration automatically. The regeneration light (top light) will glow solid, then go out when regeneration is complete. DO NOT turn off the tractor until the light goes out.

3. Parked Regeneration (Level 1) – this is required when Regeneration has not occurred and the DPF is getting full. Either the tractor was shut off before regeneration completed (too many times) or the tractor has been in Inhibit Mode and regeneration has not been allowed to take place. This happens more often when the tractor is run for short periods and the engine and DPF have not both reached operating temperature

  • 1. The regeneration indicator will begin flashing (top right light, circled in red)
  • 2. The RPM indicator will begin flashing (next light down, boxed in white)
  • 3. The Parked Regeneration light will begin flashing (3rd light, circled in blue)
  • 4. 1 beep will sound every 5 seconds until Parked Regeneration takes place.
Parked Regeneration (Level 1)
  • 5. Park the tractor, leave it running.
  • 6. Make sure your tractor has at least ¼ tank of fuel
  • 7. Put your tractor into Neutral
  • 8. Set your Parking Brake.
  • 9 .Lower hand throttle all the way to the bottom; down to lowest idle setting.

Tractor will automatically throttle up during parked regen; if throttle is up at all the tractor will not regenerate no matter how long you press and hold the button.

  • 10. Press and hold Parked Regeneration button (circled in red) for at least 2 seconds.
Parked Regeneration (Level 1)
  • 11. Parked Regeneration will take about 30-45 minutes. IF the Regeneration Cycle is interrupted (ie: you turn the tractor off), or conditions are still not satisfied for regeneration then you move to Level 2.

Parked Regen (Level 2) – this happens when the Parked Regeneration cycle is ignored or gets interrupted before completion.

  • 12. The regeneration indicator will begin flashing (top right light, circled in red)
  • 13. The RPM indicator will begin flashing (next light down, boxed in white)
  • 14. The Parked Regeneration light will begin flashing (3rd light, circled in blue)
  • 15. 1 beep will sound every 3 seconds until Parked Regeneration takes place.
Parked Regeneration (Level 2)
  • 16. Park the tractor, leave it running.
  • 17. Make sure your tractor has at least ¼ tank of fuel
  • 18. Put your tractor into Neutral
  • 19. Set your Parking Brake.
  • 20. Lower hand throttle all the way to the bottom; down to lowest idle setting.

    Tractor will automatically throttle up during parked regen; if throttle is up at all the tractor will not regenerate no matter how long you press and hold the button.

    • Press and hold Parked Regeneration button (circled in red) for at least 2 seconds.
    Parked Regeneration (Level 2)
    • Parked Regeneration will take about 30-45 minutes. IF the Regeneration Cycle is interrupted this time (ie: you turn the tractor off), or conditions are still not satisfied for regeneration then Forced Regeneration will be required.

    4. Forced Regeneration – This happens because Regeneration has failed or been ignored too many times (this is generally operator error and not covered by manufacturer warranty). The Engine Warning light (circled in green below) will begin flashing AND the Parked Regeneration light will begin flashing. Your tractor will show a 5-digit code beginning with the letter “P”: “PXXXX” in the hour meter (circled in red) and the engine will de-rate (drop to ½ power).

    Forced Regeneration
    Forced Regeneration

    Write this code down. Call your local Kubota Dealership, give the service department that code. A technician will be dispatched to your tractor to complete a Forced Regeneration for you. You should expect to be billed for the service call at current on-the-road rates from the time the tech leaves the dealership to the time he returns. This is not warrantable.

    *For B3350, F3990 & ZD1511: Advance the throttle to 2100 RPMs

    **For B3350 the Inhibit and Parked Regen buttons are on the right side of the dash under the hand throttle lever

    **For the F3990 One button is on each side of the dash