Massey Ferguson 9174 – EEM: MPROP Control Excessive Temperature

The Engine Electronic Module (EEM) has detected an excessive temperature in the MPROP (Metering Proportional Valve) control, also known as the Fuel Control Actuator (FCA). This indicates that the electronic solenoid component of the FCA is overheating, which can be caused by an internal failure, high electrical resistance, or wiring harness issues. Failure of this component affects common rail fuel pressure and can lead to hard starting, no-start conditions, loss of power, engine surging, or excessive smoke.

• 7600 Series
• 7614
• 7615

1. 1

   Inspect the wiring harness and connector at the MPROP/FCA for any signs of damage, corrosion, or loose connections.

2. 2

   Scan for other active fault codes that may indicate a related issue with the electrical or fuel system.

3. 3

   Check for contaminated fuel and ensure fuel filters are not clogged, as this can put extra strain on the fuel system.

4. 4

   Perform a 'backyard' actuator test for a no-start condition by unplugging the FCA electrical connector. If the engine fails to start normally but starts after the FCA is unplugged, it strongly suggests the FCA is faulty. (Caution: Shut down the engine immediately after starting, as unplugging the actuator commands maximum rail pressure, which can cause engine damage).

1. 1

   Prepare the machine

   Ensure the tractor is parked on level ground, the engine is off, and the key is removed. Disconnect the battery.

2. 2

   Locate the MPROP/FCA

   Locate the MPROP/FCA on the high-pressure CP3 fuel injection pump. It is typically a small cylindrical component attached with three Torx screws. Remove any side panels or components necessary to gain clear access.

3. 3

   Disconnect and remove actuator

   Disconnect the electrical connector from the MPROP/FCA. Carefully clean the area around the actuator to prevent dirt from entering the fuel pump. Remove the three Torx head screws (often T-25 size) and gently pull the actuator out of the pump body. Be prepared for a small amount of fuel spillage.

4. 4

   Install new actuator

   Lightly lubricate the pre-installed O-rings on the new MPROP/FCA with clean diesel fuel. Insert the new actuator into the pump body.

5. 5

   Secure and reconnect

   Install and tighten the three retaining screws to the manufacturer's specified torque. Reconnect the electrical connector.

6. 6

   Reassemble and test

   Reinstall any panels or components that were removed. Reconnect the battery. Start the engine and check for fuel leaks. Clear the fault codes using a diagnostic tool and verify that the code does not return.