Case IH 275 – Engine Control Module (ECM / ENG): Front Pumping Element of the CAPS Fuel Pump

The mechanical system of the front pumping element is not responding properly, is out of adjustment, or has suffered a mechanical failure.

• MX Magnum
• STX Steiger
• MX180
• MX210
• MX220
• MX230
• MX240
• MX255
• MX270
• MX285
• 275
• STX275
• STX325
• 2377
• 2388
• 2577
• 2588
• Patriot 4420
• FLX3010
• FLX3510
• FLX4010
• FLX4510

1. 1

   Check fuel filters for restriction or plugging, which can cause intermittent codes (Fault Code 275 and 328).

2. 2

   Verify that the fuel lift pump is supplying adequate pressure to the CAPS pump.

3. 3

   Inspect the engine wiring harness for failures that could trigger the fault.

4. 4

   Check for active electrical circuit Fault Codes 271 or 272 (Front Pumping Valve Circuit) and troubleshoot those first if present.

5. 5

   Use an Electronic Service Tool (EST) to run the 'Pumping Plunger Cutout Test' to verify element performance.

1. 1

   Perform Pumping Plunger Cutout Test

   Connect the Electronic Service Tool (EST) and perform the Pumping Plunger Cutout Test.

2. 2

   Evaluate test results

   If the front pumping element fails to perform equally to the rear element or fails to maintain accumulator pressure, the mechanical pumping element has failed.

3. 3

   Replace components

   Replace the fuel accumulator module. Note: Because individual CAPS pump components are highly complex and prone to wear, most dealers and diesel shops replace the entire CAPS Fuel Injection Pump assembly as a remanufactured unit or install a P-Pump conversion kit.

4. 4

   Reconnect components

   Once the new pump or accumulator module is installed, reconnect all components and turn the key switch to the 'ON' position.

5. 5

   Idle engine

   Start the engine and let it idle for one minute.

6. 6

   Verify fault code

   Using the EST, verify that Fault Code 275 is now inactive.

7. 7

   Erase fault codes

   Erase the inactive fault codes using the EST to complete the repair.