0A.70.25

Massey Ferguson 0A.70.25: External Hydraulic Valve 7 Issue

Issue description

Indicates a fault or connection problem with the 7th external hydraulic remote valve (spool valve) on the tractor.

Retrieve and verify the active DTCs using a compatible Massey Ferguson diagnostic tool or interface device.
Inspect the wiring harness leading to External Hydraulic Valve 7 for loose connectors, corroded pins, or damaged wiring.
Inspect the pilot pressure control unit on the electric spool valve for proper operation or leaks.

Relieve Pressure
Ensure the tractor is turned off and relieve all hydraulic system pressure before servicing the valve block.
Locate the Valve
Locate the external hydraulic valve stack (spool slices) at the rear of the tractor. Identify Valve 7 in the sequence.
Disconnect Wiring
Disconnect the electrical harness from the faulty electric spool slice.
Remove the Valve
Unbolt the faulty spool slice from the hydraulic block assembly.
Install the Replacement
Mount the new electric spool slice and torque the bolts to OEM specifications. Reconnect the electrical harness.
Programming
New electric spool slices typically need to be programmed to the tractor's onboard computer using a dealer diagnostic tool before they will function correctly.

(3)

Electric Spool Slice (Valve Head Unit)
3797234M6
Alternate/superseded numbers: 3797234M5, 3797234M4, 3797234M3, 3796930M12, R917007388. Fits many 6400, 6600, and 7400 series tractors; verify exact fitment for your specific Tier 4 model.
3797234M6

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