Massey Ferguson 00.03.4E – Dash: Issue With Steering Valve Mounted On Steering Orbitrol Unit

Electrical or functional malfunction with the steering valve that controls the hydrostatic steering system, which is mounted directly on the orbitrol unit at the base of the steering column.

• 7714
• 7715
• 7715S
• 7716
• 7716S
• 7718
• 7718S
• 7719
• 7720
• 7720S
• 7722
• 7722S
• 7724
• 7724S
• 7726
• 7726S
• Tier 4 (2015-2021)
• 7700 Series
• 7700S Series

1. 1

   Inspect the wiring harness and connector between the Dash and the steering valve on the orbitrol unit for chafed wires, loose pins, or corrosion.

2. 2

   Verify that the Dash is sending the correct output/supply voltage to the steering valve.

3. 3

   Check the auxiliary hydraulic oil level and ensure there is adequate pressure.

4. 4

   Inspect the orbitrol unit for visible hydraulic leaks, physical damage to the solenoid/valve, or a stuck spool valve.

1. 1

   Depower the Tractor

   Turn off the engine, engage the parking brake, and disconnect the battery to prevent electrical shorts while working on the Dash/steering circuits.

2. 2

   Access the Orbitrol Unit

   Remove the lower steering column cowlings/panels inside the cab to access the orbitrol steering unit mounted at the base of the steering column.

3. 3

   Relieve Hydraulic Pressure

   Ensure all hydraulic pressure in the auxiliary steering circuit is relieved before loosening any fittings.

4. 4

   Disconnect Electricals

   Unplug the electrical connector from the steering valve mounted on the orbitrol unit.

5. 5

   Remove Hydraulic Lines

   Mark the hydraulic lines (Pressure, Tank, Left, Right, and Load Sense if applicable) for proper reassembly, then disconnect them from the orbitrol unit. Cap the lines to prevent contamination.

6. 6

   Unbolt the Unit

   Remove the mounting bolts securing the orbitrol unit to the steering column and remove the assembly.

7. 7

   Replace the Valve/Unit

   Depending on the exact failure and part availability, replace the mounted steering valve solenoid or the entire orbitrol unit assembly.

8. 8

   Reassembly

   Mount the new unit, reconnect the hydraulic lines to their correct ports, and plug in the electrical harness.

9. 9

   Bleed the System

   Refill any lost hydraulic fluid. Reconnect the battery, start the tractor, and turn the steering wheel lock-to-lock several times to bleed air from the hydrostatic steering system.

10. 10

    Clear Codes

    Use the Dash Control Center or a diagnostic tool to clear the 00.03.4E fault code and verify that steering operates smoothly without throwing a new code.