Massey Ferguson 08.03.11 – HITCH: Rear Linkage Lower Solenoid High Voltage (HITCH)

The tractor's onboard diagnostic system has detected an abnormally high voltage signal on the circuit controlling the rear linkage 'lower' (drop) solenoid. This typically indicates a short to power in the wiring harness, a failed solenoid coil, or an internal fault within the control module.

• 7724S
• 5712SL
• 7722
• 7722S
• 5713SL
• 7720S
• 7716
• 7718
• T4
• 7715
• 5710SL
• 7726
• 7726S
• 5711SL
• 7718S
• 7719
• 7714
• 7716S
• 7720
• Tier 4 (2015-2021)
• 7715S
• 7724

1. 1

   Inspect the wiring harness leading to the rear hydraulic valve block (on the transmission housing) for rubbed, melted, or pinched wires that could be shorting to a power source.

2. 2

   Disconnect the plug at the lower solenoid and check for water ingress, corrosion, or bent pins.

3. 3

   Ensure the external rear fender (mudguard) raise/lower buttons are not physically stuck or damaged, as they share circuitry with the hitch module.

4. 4

   Measure the resistance (Ohms) across the solenoid coil pins. An open circuit or out-of-spec resistance indicates a burnt-out coil.

5. 5

   Check the supply wire at the harness connector for voltage with the key ON. If it shows constant high voltage without the 'lower' command being active, there is a short to power in the harness.

1. 1

   Preparation

   Park the tractor on a level surface, fully lower the rear linkage (if possible) to remove mechanical tension, and turn off the engine.

2. 2

   Depressurize

   Relieve hydraulic system pressure by cycling the hydraulic controls with the engine off.

3. 3

   Disconnect Power

   Disconnect the negative battery terminal to prevent electrical spikes and ensure safety.

4. 4

   Locate the Solenoid

   Locate the rear linkage control valve block on the rear transmission housing. Identify the 'Lower' solenoid (refer to the service manual diagram for your specific model to distinguish it from the 'Raise' solenoid).

5. 5

   Removal

   Unplug the electrical connector from the solenoid. Remove the retaining nut at the end of the solenoid stem. Slide the electromagnetic coil off the valve cartridge. (If the hydraulic cartridge valve itself is leaking or sticking, unscrew the cartridge from the valve block using the appropriate wrench).

6. 6

   Installation

   Slide the new solenoid coil onto the stem (or thread in the new cartridge valve assembly). Tighten the retaining nut to OEM torque specs. Reconnect the electrical plug, ensuring the weather seal is intact.

7. 7

   Testing

   Reconnect the battery. Start the tractor, check hydraulic fluid levels, and test the rear linkage operation using both the in-cab controls and the mudguard switches.

8. 8

   Clear Codes

   Use a compatible diagnostic tool to clear the 08.03.11 DTC from the HITCH module.