Massey Ferguson A.81.19: External Hydraulic Valve 8 Issue

Malfunction in the circuit or mechanical operation of the 8th external hydraulic remote valve (spool valve). Manifests as slow, weak, or completely dead remote hydraulics.

• 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

   Inspect the hydraulic oil filter and transmission filter for blockages

2. 2

   Check the hydraulic oil for dirt or contamination

3. 3

   Look for damaged quick couplers or worn/blocked hoses that could restrict flow

4. 4

   Determine if the spool valve is physically sticky or if there are pressure-related faults at the relief valve

1. 1

   Rule out the basics

   Begin by replacing the hydraulic/transmission filters and changing the hydraulic oil if it is contaminated.

2. 2

   Test the couplers

   Ensure the ½” ISO 5675 female quick couplers are functioning and not blocking fluid flow.

3. 3

   Inspect the spool valve

   If the hydraulics remain slow or dead, inspect the external hydraulic spool valve assembly for sticking components or internal wear.

4. 4

   Check the relief valve and pump

   If the spool valve is functioning but pressure is weak, inspect the relief valve for faults and check the hydraulic pump for wear.

5. 5

   Replace the valve

   If the spool valve itself has failed, unbolt the faulty valve assembly (often mounted directly on the lift cover under the seat) and install a replacement spool valve or diverter valve kit.