Bobcat D7596 (75-96) Fault Code: Right Speed Sensor Reverse Direction
Also shown on the panel as 75-96 · Also called Drive Right Speed Sensor Reverse Direction
Right Speed Sensor Reverse Direction · ai-assisted, editor-reviewed · Last updated 2026-07-13
TL;DR
Bobcat code D7596, shown on the panel as 75-96, sets when the drive/drive plus controller sees the joystick asking for right swash plate travel in one direction while the right speed sensor reports movement in the opposite direction. The machine keeps running in speed management mode, but the drive system is no longer trusting the right side speed feedback, so it needs to be checked before you rely on that machine for real work.
Medium severity. The machine stays in speed management mode and keeps operating, so it is not an immediate shutdown code. But mismatched direction feedback on a drive circuit means the controller cannot fully trust right side speed data, which affects drive control and should be diagnosed before continued heavy use.
What does Bobcat error code D7596 mean?
D7596 (panel code 75-96) is set by the drive or drive plus controller on Bobcat loaders and compact track loaders when it compares two things: the direction commanded by the joystick for the right swash plate, and the actual direction reported by the right speed sensor. When those two disagree in direction, the controller flags this code.
On wheeled machines, the speed sensor sits in the motor carrier and reads magnets on a rotating disk. On track machines, the sensor sits in the drive motor and reads teeth on a metal sprocket. Either way, the sensor's job is to confirm the wheel or track motor is actually turning the direction the controller told it to.
Despite the fault, the machine continues to run in speed management mode. That means drive functions are not cut off, but the controller is operating with a known conflict between commanded and sensed direction on the right side.
Common causes of D7596
- Speed sensor installed incorrectly on the right side drive motor or motor carrier.
- Signal wires reversed or open, referenced as wires 3000 or 3870 and 3070 or 3875 depending on the model and harness variant.
- A fault in the drive/drive plus controller itself.
- Moisture, corrosion, or pushed-back pins in the drive/drive plus controller connectors, the speed sensor connector, or wire harness connectors.
- Intermittent cases where the code is not active at the time of testing: probable causes include loose connections, corrosion, pushed-back pins, the controller, the wire harness, or a combination of these problems.
How to troubleshoot Bobcat D7596: first checks
- Confirm the code is active before tearing into wiring: connect a diagnostic tool with the key switch on, PTOL enabled, engine running, and a drive command given, since these are the conditions under which the code sets.
- Inspect the right speed sensor mounting to confirm it is installed correctly and fully seated in the motor carrier (wheeled machines) or drive motor (track machines).
- Check the relevant signal wires for damage, reversed connections, or open circuits. Depending on your model this may be wires 3000/3070 or 3870/3875.
- Open and inspect the drive/drive plus controller connectors, the speed sensor connector, and any harness connectors in between for moisture, corrosion, or pins that have pushed back out of their sockets.
- If the code will not stay active for testing, treat it as intermittent and focus on loose connections, corrosion, and pushed-back pins first, since these are the most common intermittent causes.
How the code clears
Once the repair is complete, cycle the key power to clear the code. No separate clearing step is listed beyond a power cycle.
Affected models and serial ranges
D7596 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 D7596 mean?
It means the drive/drive plus controller detected the joystick commanding right swash plate movement in one direction while the right speed sensor reported movement in the opposite direction. It shows on the panel as 75-96.
Can I keep operating the machine with D7596 active?
The machine will continue to run in speed management mode when this code is present, but since it reflects a direction mismatch on the right drive circuit, it should be diagnosed as soon as practical rather than ignored.
Where is the right speed sensor located?
On wheeled machines it is in the motor carrier and reads magnets on a rotating disk. On track machines it is in the drive motor and reads teeth on a metal sprocket.
What wires should I check for D7596?
Depending on the model and harness, check signal wires 3000 or 3870, and 3070 or 3875, for reversed connections or open circuits.
How do I clear D7596 after making a repair?
Cycle the key power. No separate clearing step is listed for this code.
Why does D7596 sometimes come and go?
Intermittent occurrences are usually tied to loose connections, corrosion, or pushed-back pins in the connectors, though the controller or harness can also be involved. If the code isn't active during testing, focus on these areas first.
Which Bobcat models can show code D7596?
This code applies to S510, S530, S550, S570, S590, S630, S650, S750, S770, T550, T590, T630, T650, T750, and T770 machines.