Bobcat M1832 (18-32) Fault Code: Lift Spool Lock Solenoid Over Current
Also shown on the panel as 18-32 · Also called Lift Spool Lock Output Overcurrent
Lift Spool Lock Solenoid Over Current · ai-assisted, editor-reviewed · Last updated 2026-07-13
TL;DR
M1832 (panel code 18-32) sets when Bobcat's gateway controller senses too much current flowing through the lift spool lock solenoid return wire (2680 on some models, 2380 on others). When it sets, both lift and tilt functions are disabled until the fault clears and power is cycled.
High severity. Lift and tilt are disabled the moment this code sets, which stops loader work immediately. It is not a safety-critical failure in the sense of runaway movement, but it takes the machine out of service until the wiring, solenoid, or controller issue is found and fixed.
What does Bobcat error code M1832 mean?
M1832 is set by the gateway controller when it detects excessive current draw through the lift spool lock solenoid's return wire, either wire 2680 or wire 2380 depending on the model and harness variant. The controller has an output driver that can only handle so much current, and when the draw goes above what that driver can safely manage, the controller shuts the circuit down to protect itself from damage.
The lift spool lock solenoid is part of the hydraulic control that locks the lift spool in position. When the controller can't drive that solenoid safely, Bobcat disables both lift and tilt functions as a protective measure, so the loader arms and bucket won't respond until the fault is cleared.
This code applies across a wide range of Bobcat skid steer and compact track loader models, including the S510 through S770 and T550 through T870 series. The exact return wire number differs by model, but the underlying fault and the disabled functions are the same.
Common causes of M1832
- Return wire (2680 or 2380 depending on model) shorted to supply voltage, or shorted to the corresponding signal wire (4680 or 4380).
- A failed lift spool lock solenoid drawing excess current.
- A fault inside the gateway controller itself.
- Moisture, corrosion, or pushed-back pins in the gateway controller connectors, the lift spool lock solenoid connector, or the mainframe harness.
- Intermittent conditions where the code is not active at the time of testing. In these cases the root cause may not be found right away, and probable causes include loose connections, corrosion, pushed-back pins, the controller, the wire harness, or a combination of these problems.
How to troubleshoot Bobcat M1832: first checks
- With the key switch off, inspect the gateway controller connectors, the lift spool lock solenoid connector, and the mainframe harness connectors for moisture, corrosion, or pins that have been pushed back out of place.
- Check the return wire (2680 or 2380, depending on your model) for a short to supply voltage or a short to its paired signal wire (4680 or 4380).
- Test the lift spool lock solenoid itself for an internal short or damage that could be pulling excessive current.
- If the code is not currently active, treat it as intermittent: recheck all connectors and harness sections along the affected wire's routing, since loose connections or corrosion that aren't visible under a quick look can still be the cause.
- If wiring, connectors, and the solenoid all check out, suspect the gateway controller itself.
How the code clears
Once the repair is complete, cycle the key switch power off and back on. No other reset procedure is listed for this code.
Affected models and serial ranges
M1832 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, SN A3NW11249-99999 |
| S750 | SN A3P211001-299999 |
| S770 | 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 M1832 mean?
It means the gateway controller detected too much current flowing through the lift spool lock solenoid's return wire, more than the controller's output driver can handle safely. The controller disables lift and tilt to protect itself and the circuit.
Why did my loader lose lift and tilt function?
When M1832 sets, Bobcat's gateway controller automatically disables lift and tilt as a protective step. This is expected behavior for this fault, not a separate malfunction.
Is M1832 the same on every Bobcat model?
The fault behavior is the same, but the exact return wire number differs. Some models use return wire 2680 with signal wire 4680, while others use return wire 2380 with signal wire 4380. Check your model's wiring reference to know which applies.
How do I clear M1832 after repairing it?
Cycle the key switch power off and back on. No separate clearing step is listed beyond a power cycle.
Can M1832 be an intermittent problem?
Yes. If the fault is not active when you test the machine, the root cause may not show up right away. Likely culprits in these cases are loose connections, corrosion, pushed-back pins, the controller, or the wire harness.
What should I check first if I get this code?
Start with a visual and physical inspection of the gateway controller connectors, the lift spool lock solenoid connector, and the mainframe harness for corrosion, moisture, or pushed-back pins, then test the return wire for shorts to supply voltage or to the signal wire.
Which Bobcat models can show code M1832?
This code appears on the S510, S530, S550, S570, S590, S630, S650, S750, S770, T550, T590, T630, T650, T750, and T770 T870 loaders.