Case IH 2569 – UCM (Universal Control Module): Gear pump (hydro filter) - high pressure warning

The system has detected abnormally high pressure at the hydrostatic gear pump filter. The primary failure mode is typically a faulty hydro filter pressure sensor (charge pressure sensor).

• Optum
• Case IH Puma 150
• Case IH Puma 165
• Case IH Puma 185
• Case IH Puma 200
• Case IH Puma 220
• Case IH Puma 240

1. 1

   Check for concurrent codes; if no other error code is displayed, proceed with diagnostics

2. 2

   Verify that the tractor battery power supply has not been connected to an external power supply (like a jump starter or external charger). Disconnect if present and test for normal operation

3. 3

   Inspect the hydro filter pressure sensor (charge pressure sensor) connector (e.g., X-523 or X-916) and the UCM controller connector (e.g., X-955)

4. 4

   Verify pin fitment to ensure the connectors are fully seated, not damaged, pins are in the correct position, and the fit is tight

5. 5

   Disconnect the sensor connector and check for a +5 Volt reference signal coming from the UCM

1. 1

   Repair Wiring

   If a fault is indicated during the connector and voltage checks, repair or replace the wiring harness/connector as required.

2. 2

   Replace Sensor

   If the wiring and voltage are good, the hydro filter pressure sensor (charge pressure sensor) is likely faulty and should be replaced.

3. 3

   Clear and Test

   Once the cause of the error code has been rectified, clear the error code from the UCM and test the hydraulic system for normal operation.

4. 4

   Software Update

   If the fault is still present after replacing the sensor, download the correct/latest level of software to the UCM.

5. 5

   Replace UCM

   If the fault recurs after verifying the sensor, wiring, and software, remove and replace the Universal Control Module (UCM).