Massey Ferguson 0A.42.24: External Hydraulic Valve 4 Issue

An alphanumeric Diagnostic Trouble Code (DTC) generated by the tractor's onboard diagnostic system to indicate a fault or potential issue within the hydraulic system, specifically isolating the problem to the 4th external hydraulic remote/spool valve.

• 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
• 4707
• 4708
• 4709
• 4710
• 5608
• 5609
• 5610
• 5611
• 5612
• 5613
• 7614
• 7615
• 7616
• 7618
• 7619
• 7620
• 7622
• 7624
• 7626

1. 1

   Use a compatible Massey Ferguson diagnostic tool or interface device to pull active DTCs and confirm 0A.42.24 is present.

2. 2

   Inspect the electrical harness, connectors, and pins leading to External Hydraulic Valve 4 for corrosion, damage, or loose connections.

3. 3

   Refer to the specific tractor's service manual to interpret the exact nature and physical location of the fault before replacing parts.

1. 1

   Verify the fault

   Connect your diagnostic interface to the tractor to verify the fault.

2. 2

   Locate the valve

   Locate External Hydraulic Valve 4 (the spool slice) on the rear hydraulic valve stack.

3. 3

   Check connections

   Check the wiring harness and pilot pressure control connections.

4. 4

   Replace the electric spool slice assembly

   If the valve has failed internally or electrically, replace the electric spool slice assembly.

5. 5

   Program the new unit

   If replacing the electric spool slice (e.g., part 3797234M6), the new unit must be programmed to the tractor after physical installation.

6. 6

   Clear DTCs

   Clear the DTCs using your diagnostic tool to ensure the fault does not return.