Bobcat D7580 (75-80) Fault Code: Right Speed Sensor Out of Range Low
Also shown on the panel as 75-80 · Also called Drive Right Speed Sensor Out of Range Low, Right Speed Sensor Out Of Range Low
Right Speed Sensor Out of Range Low · ai-assisted, editor-reviewed · Last updated 2026-07-13
TL;DR
D7580 (panel code 75-80) sets when the Bobcat drive controller sees pulses from the right speed sensor below 0.15 volts. The machine keeps running but drops into speed management mode until the signal is restored or the fault is repaired.
Medium severity. The machine does not shut down. It switches to speed management mode, which limits normal drive performance until the sensor signal is fixed. Not an emergency stop situation, but it should be diagnosed before continuing heavy work since travel control is affected.
What does Bobcat error code D7580 mean?
, D7580 is a Bobcat drive-system code that fires when the controller stops seeing a valid pulse signal from the right speed sensor. On wheeled machines this sensor reads magnets on a rotating disk inside the motor carrier. On track machines it reads teeth on a metal sprocket inside the drive motor. Either way, the controller uses this pulse train to know how fast the right side of the machine is actually moving.
When the signal drops below 0.15 volts, the controller can no longer trust that speed reading. Rather than guess, it puts the machine into speed management mode, a reduced or protected drive behavior meant to keep things safe until the sensor input is restored.
This code applies across a wide range of Bobcat skid-steer and track loader models, including the S510, S530, S550, S570, S590, S630, S650, S750, S770, T550, T590, T630, T650, T750, T770, and T870.
What triggers a Bobcat D7580 code?
The code sets when the drive controller detects pulses from the right speed sensor below 0.15 volts, with the key switch or run/enter switch on.
Common causes of D7580
- Signal wire (3000 or 3870, depending on harness) shorted to ground.
- Signal wire (3070 or 3875, depending on harness) shorted to ground.
- Supply wire (1530 or 5870, depending on harness) shorted to ground or open.
- A faulty right wheel speed sensor.
- A faulty drive controller.
- Moisture, corrosion, or pushed-back pins in the drive controller connectors or SJC harness connectors.
- An intermittent fault that is not present at the time of testing. Possible causes in that case include loose connections, corrosion, pushed-back pins, the controller itself, the wire harness, or a combination of these problems.
How to troubleshoot Bobcat D7580: first checks
- Turn the key switch to run/enter and check for the active code, then inspect the right wheel speed sensor connector and wiring for visible damage, moisture, or corrosion.
- Check the drive controller connectors and SJC harness connectors for pushed-back pins, corrosion, or loose terminals.
- Trace the signal wire (labeled 3000/3870 or 3070/3875 depending on the harness) for signs of chafing or shorting to ground.
- Check the supply wire (labeled 1530 or 5870 depending on the harness) for an open circuit or a short to ground.
- If the code is not currently active, treat it as intermittent and focus on connector integrity, wiggle-testing harness runs, and checking for corrosion before condemning the sensor or controller.
- Confirm whether the affected machine is a wheel or track model, since the sensor type differs: wheel machines use a magnet-and-disk sensor in the motor carrier, track machines use a tooth-sensing setup on the drive motor sprocket.
How the code clears
D7580 is self resetting. No separate clearing step is listed. Once the wiring, connector, sensor, or controller issue is corrected and the controller sees a valid signal from the right speed sensor, the code clears on its own.
Affected models and serial ranges
D7580 appears in our records across 16 Bobcat models. Match your machine by model and serial number.
| Model | Serial ranges |
|---|---|
| S510 | SN A3NJ11001-99999, SN A3NK11001-99999, SN ATZC11001-ATZC99999 |
| S530 | SN A7TV11001-99999, SN ATZD11001-99999 |
| S550 | SN A3NK11001-A3NL99999, SN A3NM11001-99999 |
| S570 | SN A7U711001-799999, SN A7U811001-899999 |
| S590 | SN ANMN11001-99999, SN ANMP11001-99999 |
| S630 | SN A3NT12370-99999, SN A3NU11001-11111, SN A3NU11112-99999 |
| S650 | SN A3NV11001-13098, SN A3NV13099-99999, SN A3NW11001-11248 |
| S750 | SN A3P211001-299999 |
| S770 | SN A39511001-99999, SN A3P411001-99999 |
| T550 | SN A7UJ11001-AJZV12276 |
| T590 | SN ALJU11001-999999, SN B37811001-999999, SN B3Z711001-999999 |
| T630 | SN A7PU11001-11663, SN A7PU11664-99999 |
| T650 | SN A3P012214-099999, SN A3P111242-199999 |
| T750 | SN ANKA11001-A99999 |
| T770 | SN A3P811001-899999, SN A3P911001-999999 |
| T870 | SN A3PG11001-99999, SN A3PH11001-99999 |
Frequently asked questions
What does Bobcat code D7580 mean?
It means the drive controller is reading pulses from the right speed sensor below 0.15 volts, which is too low to be a valid signal. The machine responds by running in speed management mode until the issue is fixed.
Can I keep operating the machine with D7580 active?
The machine will still move, but it operates in speed management mode, which limits normal drive response. It is best to diagnose the fault before returning to full production work, since right-side speed sensing is impaired.
Do I need to manually clear D7580 after repair?
No. The code is self resetting. Once the sensor signal is restored to a valid level, the fault clears automatically without a separate reset procedure.
Is D7580 caused by a wiring problem or a bad sensor?
It can be either. Bobcat lists shorted or open signal and supply wires, a faulty right wheel speed sensor, a bad drive controller, and corroded or pushed-back connector pins as possible causes. Intermittent cases often trace back to connector corrosion or loose pins.
Why does the panel show 75-80 instead of D7580?
75-80 is the numeric panel display form of the same fault code, D7580. They refer to the identical right speed sensor low condition.
Is the right speed sensor different on wheeled versus tracked Bobcat machines?
Yes. Wheel machines use a sensor in the motor carrier that reads magnets on a rotating disk. Track machines use a sensor in the drive motor that reads the teeth on a metal sprocket. Both feed the same type of pulse signal to the drive controller.
What should I check first if D7580 keeps coming back intermittently?
Focus on connector condition rather than immediately replacing parts. Check for moisture, corrosion, and pushed-back pins in the drive controller and SJC harness connectors, and inspect the harness for loose connections along its length.