Massey Ferguson A.20.22 – Hydraulic Control Module / Valve Controller: External Hydraulic Valve 2 Issue

Malfunction in the second external hydraulic remote valve (spool valve). The underlying condition is typically a connection problem on the hydraulic valve, an issue with the spool position sensor value, restricted oil flow, or a mechanical failure within the valve itself (such as a stuck spool or failed solenoid).

• 5710SL
• 5711SL
• 5712SL
• 5713SL
• T4
• 4707
• 4708
• 4709
• 4710
• 5608
• 5609
• 5610
• 5611
• 5612
• 5613
• 7614
• 7615
• 7616
• 7618
• 7619
• 7620
• 7622
• 7624
• 7626
• 7714
• 7715
• 7715S
• 7716
• 7716S
• 7718
• 7718S
• 7719
• 7720
• 7720S
• 7722
• 7722S
• 7724
• 7724S
• 7726
• 7726S

1. 1

   Check the hydraulic fluid (UTTO) level and condition for contamination, and inspect the hydraulic/transmission filter for blockages

2. 2

   Inspect the wiring harness and electrical connectors going to External Hydraulic Valve 2 for corrosion, loose pins, or damaged wires

3. 3

   Use a compatible diagnostic tool to read the live data for the Spool Position Sensor Value to check for erratic or out-of-range readings

4. 4

   Inspect the rear hydraulic quick couplers for physical damage, blockages, or worn seals that could restrict flow

1. 1

   Depressurize the System

   Turn off the tractor and cycle the hydraulic levers/controls to relieve all residual hydraulic pressure in the system.

2. 2

   Drain/Catch Fluid

   Place a catch pan beneath the rear remote valve block, as hydraulic fluid will leak during removal.

3. 3

   Disconnect Electricals

   Disconnect the wiring harness connectors from the solenoids and spool position sensor on Valve 2.

4. 4

   Remove Hoses and Couplers

   Unbolt and disconnect the hydraulic lines and quick couplers attached to the faulty valve section.

5. 5

   Remove the Valve

   Unbolt the External Hydraulic Valve 2 assembly from the main hydraulic lift cover / valve stack.

6. 6

   Install New Components

   Install the replacement spool valve or rebuild the existing valve using an OEM repair kit (replacing O-rings, seals, and faulty sensors).

7. 7

   Reassembly

   Bolt the valve back into the stack to the manufacturer's torque specifications. Reconnect all hydraulic lines and electrical harnesses.

8. 8

   Fluid and Filter Service

   Replace the hydraulic oil filter and top up the system with clean UTTO (Universal Tractor Transmission Oil) fluid.

9. 9

   Clear Codes and Test

   Connect a diagnostic tool, clear the 0A.20.22 / A.20.22 fault code, and operate the remote valve to ensure proper pressure, flow, and sensor communication.