PTR 000191.00 – Excessive Top Shaft Speed During Calibration

PTR 000191.00 (PTR 191.00)

Code: 000191.00

Shortcode: 191.00


This error code, PTR 000191.00, indicates that the Power Transmission Reverser (PTR) control unit has detected excessive top shaft speed during calibration. This can occur due to incorrect calibration procedures, faulty sensors, or mechanical issues affecting the top shaft speed.


When this error is detected, the calibration process is halted to prevent potential damage. The system may also alert the operator with a warning message or indicator light.


Review Calibration Procedure:

  • Ensure that the calibration procedure is being followed correctly according to the manufacturer’s guidelines.
  • Verify that all preliminary steps are properly completed before starting the calibration.

Inspect Sensors:

  • Check the sensors related to the top shaft speed for proper operation.
  • Ensure the sensors are not damaged, dirty, or misaligned. Replace if necessary.

Check Wiring and Connections:

  • Inspect the wiring and connectors related to the top shaft speed sensors.
  • Ensure all connections are secure and free from corrosion or damage.

Test Sensor Circuitry:

  • Use a multimeter to test the sensor circuitry for proper functionality.
  • Ensure there are no short circuits or open circuits causing incorrect speed readings.

Examine Mechanical Components:

  • Inspect the top shaft and related mechanical components for any issues that could affect speed.
  • Repair or replace any defective mechanical parts.

Update Control Unit Software:

  • Ensure that the PTR control unit software is up-to-date.
  • Apply any available software updates or patches from the manufacturer.

Monitor Calibration Process:

  • After addressing the issue, attempt the calibration process again.
  • Monitor the top shaft speed to ensure it remains within acceptable limits during calibration.


Proper calibration is essential for optimal transmission performance. Regular maintenance and accurate calibration procedures can help prevent excessive top shaft speed issues. Ensure that operators are trained to follow calibration procedures meticulously.


Control Units: John Deere

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