Bobcat M0510 (05-10) Fault Code: Hydraulic Charge Pressure High
Also shown on the panel as 05-10 · Also called Hydraulic Charge Pressure Too High
Hydraulic Charge Pressure High · ai-assisted, editor-reviewed · Last updated 2026-07-13
TL;DR
M0510 (panel code 05-10) sets when the Bobcat gateway controller sees a hydraulic charge pressure sensor signal above the specified high limit for that machine model for 10 seconds. It usually points to a misadjusted charge relief valve, a wiring/supply problem on the charge pressure sensor circuit, or a failing sensor or gateway controller.
Medium severity. M0510 is a warning about the hydraulic charge circuit, not an immediate shutdown code, but running with charge pressure out of range can accelerate pump and hydraulic component wear. Diagnose it before the machine goes back into heavy production work.
What does Bobcat error code M0510 mean?
M0510 (also shown as panel code 05-10) is set by the gateway controller when the hydraulic charge pressure sensor reports a value above the specified high pressure for that machine for 10 seconds. The exact pressure threshold is not published and varies by model, so you can't just check the number against a shop manual chart without model-specific data from Bobcat.
The charge pressure sensor wiring differs slightly by machine variant: some units use sensor wire 3190 with an 8-volt supply on wire 5190 and ground on wire 2190, while others use sensor wire 3420 with 8-volt supply wire 3400 and ground wire 3410. Either way, the logic is the same: the controller is watching for an out-of-range high signal from that sensor circuit.
This code covers a real range of Bobcat skid-steer and compact track loader models, including the S510 through S770 and T550 through T870 lines, so the wiring reference (3190-based vs 3420-based circuits) depends on which harness design your specific model uses.
What triggers a Bobcat M0510 code?
The gateway controller sets M0510 when: 1) the key switch (run/enter) is on, 2) the engine is running, and 3) hydraulic oil temperature is above 100°F (38°C). Under those conditions, if the charge pressure sensor signal stays above the specified high pressure for that machine for 10 seconds, the code sets.
Common causes of M0510
- Misadjustment of the charge relief valve, causing actual charge pressure to run higher than the sensor's expected range.
- A problem on the 8-volt supply wire to the sensor (wire 5190 on some machines, wire 3400 on others).
- A problem on the ground wire for the sensor circuit (wire 2190 on some machines, wire 3410 on others).
- A failed or failing hydraulic charge pressure sensor.
- A fault in the gateway controller itself.
- Moisture, corrosion, or pushed-back pins in the gateway controller connectors, the hydraulic charge pressure sensor connector, or the mainframe wire harness.
- An intermittent condition (not active at the time of testing) caused by loose connections, corrosion, pushed-back pins, the controller, the wire harness, or some combination of these.
How to troubleshoot Bobcat M0510: first checks
- Confirm the machine is at normal operating condition: key on, engine running, hydraulic oil above 100°F (38°C), since the code only sets under those conditions.
- Visually inspect the hydraulic charge pressure sensor connector and the gateway controller connectors for moisture, corrosion, or pushed-back pins.
- Check the mainframe wire harness routing near the sensor for chafing, pinches, or loose connections.
- Verify the charge relief valve adjustment against the correct specification for your machine model; a misadjusted relief valve is listed as a direct cause of this code.
- Test the 8-volt supply wire and ground wire for the sensor circuit (identify which wire set applies to your model: 5190/2190 or 3400/3410) for proper voltage and continuity.
- If the code is intermittent and not present during testing, treat connector corrosion, loose pins, harness damage, or controller issues as probable causes and inspect thoroughly rather than assuming the sensor alone is at fault.
How the code clears
M0510 is self resetting. No separate clearing step or manual reset procedure is listed for this code; once the underlying cause is corrected and charge pressure reads within the normal range, the code should clear on its own.
Affected models and serial ranges
M0510 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 M0510 mean?
It means the gateway controller detected a hydraulic charge pressure sensor signal above the specified high pressure for your machine, held for 10 seconds, while the engine was running and hydraulic oil was above 100°F (38°C).
Is M0510 the same as panel code 05-10?
Yes, 05-10 is the numeric panel display form of fault code M0510.
Can a misadjusted charge relief valve cause M0510?
Yes. A misadjusted charge relief valve is specifically listed as a cause of this code because it lets charge pressure run higher than the sensor's expected range.
Do I need to manually clear M0510?
No. The code is self resetting, so once the cause is fixed and pressure returns to normal, no separate clearing procedure is needed.
Why does M0510 only show up when the machine is warmed up?
The controller only checks for this fault when the key is on, the engine is running, and hydraulic oil temperature is above 100°F (38°C). Outside those conditions the code logic isn't active.
Which Bobcat models can show M0510?
It's documented across the S510, S530, S550, S570, S590, S630, S650, S750, S770, T550, T590, T630, T650, T750, T770, and T870 lines, though exact wiring numbers and pressure thresholds vary by model.
What if the code doesn't show up when I test the machine?
If M0510 is intermittent, the cause may not be found immediately. Focus your inspection on loose connections, corrosion, pushed-back pins in connectors, the wire harness, and the gateway controller itself.