Bobcat A8607 (86-07) Fault Code: ACD/RACD Output “G” Open Circuit
Also shown on the panel as 86-07 · Also called ACD Output ‘G’ Open Circuit
ACD/RACD Output “G” Open Circuit · ai-assisted, editor-reviewed · Last updated 2026-07-13
TL;DR
A8607 (panel display 86-07) sets when the Bobcat ACD/RACD controller can't detect the solenoid wired to output "G" at controller pin J1 B-4. When this happens, output "G" is disabled until the fault is fixed and power is cycled.
Medium severity. Output "G" is disabled while the code is active, which means whatever attachment function runs through that output will not work. This isn't an engine-damage or safety-shutdown event by itself, but it can leave you without a needed attachment function until it's diagnosed.
What does Bobcat error code A8607 mean?
A8607 is an open circuit fault on the ACD (Attachment Control Device) or RACD (Remote Attachment Control Device) system, specifically on output "G" at controller pin J1 B-4. The ACD/RACD controller manages power to attachment solenoids, and it expects to see a solenoid load connected to each output it drives.
When the controller stops detecting a completed circuit to the solenoid on output "G", it assumes the wiring or solenoid has failed open and disables that output as a protective measure. This keeps the controller from continuing to send commands into a circuit that isn't behaving as expected.
In plain terms: something between the controller and the output "G" solenoid, the wire, a connector, the ground path, or the solenoid coil itself, has lost continuity, or the controller itself has an internal fault.
Common causes of A8607
- Output "G" wire, controller pin J1 B-4, or the output "G" ground wire is open (broken, disconnected, or corroded through).
- The output "G" solenoid itself has failed (open coil).
- The ACD/RACD controller has an internal fault.
- Moisture, corrosion, or pushed-back pins in the ACD/RACD controller connectors, mainframe harness, attachment control harness, or at the output "G" solenoid connector.
- Intermittent fault: if the code isn't active at the time of testing, the root cause may not show up immediately. Loose connections, corrosion, pushed-back pins, the controller, the wire harness, or some combination of these can all cause an intermittent version of this code.
How to troubleshoot Bobcat A8607: first checks
- With key switch/run-enter on, pull up the fault and confirm A8607 is currently active or check if it's stored/intermittent, this changes your diagnostic approach.
- Visually inspect the ACD/RACD controller connectors, the mainframe harness connectors, and the attachment control harness connectors for moisture, corrosion, or pins that have been pushed back out of their sockets.
- Trace the wiring for output "G" back from controller pin J1 B-4 to the output "G" solenoid, checking for chafed, cut, or corroded wire and a solid ground connection.
- Check the output "G" solenoid coil itself for continuity/resistance to rule out an open coil.
- If nothing is found and the code is intermittent, recheck all connectors in the circuit again since loose or pushed-back pins are a common cause that can hide when static-tested.
- Reseat all connectors firmly and inspect for bent, backed-out, or corroded terminals before reconnecting anything.
How the code clears
Once the wiring, connector, solenoid, or controller issue is repaired, clear the code by cycling power (turn the key switch off, then back on). No separate reset procedure or software step is listed for this code beyond a power cycle.
Affected models and serial ranges
A8607 appears in our records across 20 Bobcat models. Match your machine by model and serial number.
| Model | Serial ranges |
|---|---|
| E35 | SN A93K110001-99999, SN AC2P11001-99999 |
| E42 | SN AG3411001-99999 |
| E45 | SN AG3G11001-99999, SN AHHC11001-99999 |
| E55 | SN ARWM11001-99999, SN ASW311001-99999 |
| S510 | SN A3NJ11001-99999, SN A3NK11001-99999, SN ATZC11001-99999 |
| 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 A3NT10001-12369, SN A3NT12370-99999, SN A3NU11001-11111, SN A3NU11112-99999 |
| S650 | SN A3NV11001-13098, SN A3NV13099-99999, SN A3NW11001-11248, SN A3NW11249-99999 |
| 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 |
Frequently asked questions
What does Bobcat code A8607 mean?
It means the ACD/RACD controller cannot detect the solenoid on output "G" (controller pin J1 B-4). The controller reads this as an open circuit and disables output "G" until the issue is fixed.
What does the panel display show for this code?
The panel numeric form is 86-07, which corresponds to A8607 in Bobcat's alphanumeric code system.
Which Bobcat machines can show A8607?
It applies across a range of Bobcat excavators and skid-steer/track loaders equipped with ACD/RACD attachment control, including E35, E42, E45, E55, S510, S530, S550, S570, S590, S630, S650, S750, S770, T550, T590, T630, T650, T750, and T770/T870 models.
Will my attachment stop working if A8607 is active?
Yes. Any attachment function wired to controller output "G" will be disabled while the code is active, since the controller shuts that output down as a protective response.
How do I clear A8607 after repairing it?
Cycle power by turning the key switch off and back on. No other reset step is listed.
Why can't I find the cause even though the code is stored?
If A8607 is intermittent and not active at the time of testing, the fault may be hiding due to loose connections, corrosion, or pushed-back pins that only cause an open circuit under certain conditions like vibration or moisture. Recheck all connectors carefully, since this is the most likely explanation for a code that won't reproduce.
Is A8607 dangerous to keep operating with?
It's primarily a functional fault, not a safety shutdown. The main risk is losing use of the attachment function tied to output "G" until it's repaired, so it should be diagnosed within your work shift rather than ignored long-term.