Massey Ferguson 0A.63.19 – tractor's onboard diagnostic system: External Hydraulic Valve 6 Issue
Issue description
Malfunction or communication error detected in the circuit or operation of the 6th external hydraulic remote valve (spool valve).
Applies to these machines
41 machines- 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
Check the cause
Use a compatible diagnostic tool to confirm 0A.63.19 is active and check for any accompanying voltage or connection codes.
Locate the #6 external hydraulic valve block at the rear of the tractor and inspect the electrical connector and wiring harness for physical damage, chafing, or corrosion.
Disconnect the harness and check for bent or pushed-back pins.
Test the resistance of the valve's solenoid to ensure it is within OEM specifications.
Verify that the harness is delivering the correct voltage when the #6 remote is commanded from the cab.
Repair steps
Power down the tractor, engage the parking brake, and relieve all hydraulic system pressure before servicing.
Disconnect the electrical connector at the #6 external hydraulic spool valve.
Clean the contacts using electrical contact cleaner.
If the wiring harness is damaged, splice in a repair pigtail or replace the damaged harness section.
Remove the retaining bolts for the #6 spool valve/solenoid assembly.
Perform this if the wiring and voltage supply are good but the valve solenoid fails resistance testing.
Install the replacement hydraulic spool valve or solenoid.
Ensure all O-rings are properly seated to prevent leaks.
Reconnect the electrical harness.
Connect a diagnostic tool to clear the 0A.63.19 fault code from the system memory.
Start the tractor and test the #6 hydraulic remote for proper operation and check for any hydraulic leaks.
Parts you might need
(8)External Hydraulic Valve / Auxiliary Spool Valve
Rexroth Hydraulic Electric Spool Valve (4-Pin)
3797234M6Fitment: 6400, 6600, 7400, and 7600 Series tractors.
Spool Valve / Distribution Valve
3796029M3Hydraulic Spool Valve
3795751M3Hydraulic Auxiliary Spool Valve (with load sensing)
3108256M1Fitment: 6100 Series (e.g., 6170, 6190).
Hydraulic Auxiliary Spool Valve (with load sensing)
3796083M3Fitment: 6100 Series (e.g., 6170, 6190).
Hydraulic Spool Valve Assembly
1696239M93Fitment: Various utility models including 200, 300, 500, and 600 series.
Hydraulic Spool Valve Assembly
1696239M92Fitment: Various utility models including 200, 300, 500, and 600 series.
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