Bobcat H2607 (26-07) Fault Code: Front Base Solenoid Open Circuit
Also shown on the panel as 26-07 · Also called Front Base Output Open Circuit
Front Base Solenoid Open Circuit · ai-assisted, editor-reviewed · Last updated 2026-07-13
TL;DR
H2607 (panel form 26-07) sets when the auxiliary controller or deluxe MX controller detects an open circuit on the front base solenoid signal wire or return wire. The controller disables the front base solenoid, which stops hydraulic flow through the front auxiliary female coupler until the issue is fixed.
Medium severity. This code disables one auxiliary function (front base flow) rather than the whole machine, but it will stop any attachment relying on the front auxiliary coupler from working until repaired.
What does Bobcat error code H2607 mean?
H2607 means the controller (either the auxiliary controller or, on some machines, the deluxe MX controller) sent a command to the front base solenoid but detected an open circuit on the signal wire or the return wire, meaning current can't complete its path as expected.
The front base solenoid is responsible for directing hydraulic flow through the front auxiliary female coupler, which powers attachments connected there. When this code is active, the controller disables the front base solenoid outright, so that circuit will not function regardless of what the operator commands.
Depending on the machine and controller type, the wiring involved is either signal wire 4340 and return wire 2340 (auxiliary controller) or signal wire 4100 and return wire 2100 (deluxe MX controller). Both setups behave the same way functionally.
Common causes of H2607
- Signal wire (4340 or 4100 depending on controller type) shorted to supply voltage or open
- Return wire (2340 or 2100 depending on controller type) open
- Faulty front base solenoid
- Faulty auxiliary controller or deluxe MX controller
- Moisture, corrosion, or pushed-back pins in the auxiliary controller connectors, deluxe MX controller connectors, front base solenoid connector, mainframe harness, or deluxe MX power/control harness
- Intermittent causes that may not be present at the time of testing, including loose connections, corrosion, pushed-back pins, a faulty controller, or the wire harness, or a combination of these
How to troubleshoot Bobcat H2607: first checks
- Confirm the fault conditions: key switch in run/enter position, auxiliaries enabled, and a front base command being given, since these are the conditions under which the code sets
- Inspect the front base solenoid connector and the mainframe harness (or deluxe MX power/control harness) for moisture, corrosion, or pushed-back pins
- Check the signal wire (4340 or 4100) for an open circuit or a short to supply voltage
- Check the return wire (2340 or 2100) for an open circuit
- Inspect all connectors at the auxiliary controller or deluxe MX controller for loose or corroded pins
- If the code is not active during testing, treat it as intermittent and focus on loose connections, corrosion, and pushed-back pins throughout the harness, since these are the most common intermittent causes
How the code clears
Once the repair is complete, cycle power to clear the code. No separate clearing step is listed beyond a power cycle.
Affected models and serial ranges
H2607 appears in our records across 17 Bobcat models. Match your machine by model and serial number.
| Model | Serial ranges |
|---|---|
| E35 | SN A93K110001-99999, SN AC2P11001-99999 |
| E45 | SN AHHC11001-99999 |
| 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 A3NT12370-99999, SN A3NU11001-11111, SN A3NU11112-99999 |
| S650 | SN A3NV11001-13098, SN A3NV13099-99999, SN A3NW11001-11248, SN A3NW11249-99999 |
| 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 H2607 mean?
It means the controller detected an open circuit on the front base solenoid's signal or return wire, so it disabled the front base solenoid. This stops hydraulic flow through the front auxiliary female coupler.
Will H2607 stop my machine from driving?
No. This code only affects the front base solenoid and the hydraulic flow through the front auxiliary female coupler. It does not disable driving or other machine functions.
What is the panel display code for H2607?
The numeric panel form is 26-07.
Which wires are involved in H2607?
On machines with the auxiliary controller, it's signal wire 4340 and return wire 2340. On machines with the deluxe MX controller, it's signal wire 4100 and return wire 2100.
How do I clear H2607 after repair?
Cycle power to the machine once the repair is complete. No other clearing procedure is listed.
What if the code doesn't show up when I test the machine?
If H2607 is intermittent and not active during testing, the root cause may not be found right away. Focus on loose connections, corrosion, and pushed-back pins in the connectors and harness, since these are the most likely intermittent causes.
Which Bobcat machines can show H2607?
This code applies to E35, E45, S510, S530, S550, S570, S590, S630, S650, S770, T550, T590, T630, T650, T750, T770, and T870 models.