Bobcat D7587 (75-87) Fault Code: Software Update Required
Also shown on the panel as 75-87 · Also called Drive Software Update Required
Software Update Required · ai-assisted, editor-reviewed · Last updated 2026-07-13
TL;DR
D7587 (panel code 75-87) sets when the drive/drive plus controller finds that the gateway controller's software is out of date or corrupt. Drive functions are disabled while this code is active, so the machine will not move normally until the gateway controller is updated.
High severity. Drive functions are disabled while D7587 is active, meaning the machine cannot be used for normal work until the gateway controller software is updated. It is not a fire or injury emergency on its own, but it is a stop-work condition for drive operation.
What does Bobcat error code D7587 mean?
D7587 is set by the drive or drive plus controller when it determines that the software currently loaded on the gateway controller is not up-to-date or has become corrupt. The gateway controller acts as a communication link between control modules on the machine, so if its software is not current, the drive controller will not trust it to manage drive functions.
When this code is active, drive functions are disabled. This is a deliberate safety and functionality lockout built into the system, not a random side effect. The machine is telling the operator that it will not permit normal travel until the gateway controller has been updated with correct software.
This code applies across the S510, S530, S550, S570, S590, S630, S650, S750, S770, T550, T590, T630, T650, T750, and T770, and T870 Bobcat loader models.
Common causes of D7587
- Software in the gateway controller is not up-to-date or has become corrupt.
- A fault or failure in the gateway controller itself.
- Moisture, corrosion, or pushed-back pins in the drive/drive plus controller connectors or in the AWS/SJC wire harness connectors.
- Loose connections, corrosion, pushed-back pins, a controller problem, a wire harness problem, or some combination of these, especially if the code is intermittent and not present at the time of testing.
How to troubleshoot Bobcat D7587: first checks
- confirm the key switch is in the run/enter (on) position, since this is the condition required for the code to be checked or set.
- Inspect the drive/drive plus controller connectors and the AWS/SJC wire harness connectors for moisture, corrosion, or pins that have been pushed back out of their sockets.
- Check all related wiring harness connections for looseness or damage along the harness routing to the gateway controller.
- If the code is not currently active during testing, treat it as intermittent and still inspect connectors, pins, and harness sections closely, since intermittent codes often trace back to loose connections or corrosion that only shows up under vibration or moisture.
- Verify with a dealer or service tool whether the gateway controller software level is current before assuming a hardware fault.
How the code clears
The only clearing step listed is to update the gateway controller with current software. No separate reset procedure or additional clearing step is listed beyond performing this update.
Affected models and serial ranges
D7587 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 D7587 mean?
It means the drive or drive plus controller has determined the gateway controller's software is out of date or corrupt, and as a result drive functions are disabled until it is updated.
Can I still drive my Bobcat with code D7587 active?
No. The description states that drive functions will be disabled when this code is active, so normal travel will not be possible until the gateway controller software is updated.
What is the panel or numeric form of this code?
D7587 corresponds to panel display code 75-87 on affected Bobcat machines.
How do I clear D7587 for good?
Update the gateway controller software. That is the only clearing condition listed, and no separate reset step is documented beyond completing that update.
Why does my machine show this code only sometimes?
An intermittent D7587 can be caused by loose connections, corrosion, pushed-back pins, a wire harness issue, or a controller problem, and if the code is not active during testing the exact cause may not be found right away.
Which Bobcat models can show code D7587?
It is listed for the S510, S530, S550, S570, S590, S630, S650, S750, S770, T550, T590, T630, T650, T750, T770, and T870.
Is D7587 caused by a wiring problem or a software problem?
It can be either. Listed causes include the gateway controller software itself being outdated or corrupt, a gateway controller hardware issue, or moisture, corrosion, and pushed-back pins in the drive controller or AWS/SJC harness connectors.