New Holland NH 4160 – EHR (Electronic Hitch/Hydraulic Remote) Controller: Rear Remote No.5 - Under Voltage

The voltage supplied to or measured at the electronic pilot head for the #5 rear electro-hydraulic remote (EHR) valve has fallen below the acceptable operating threshold, causing the system to lock out hydraulic functions for that remote.

• T6 Series
• T7 Series
• T8 Series
• T9 Series
• TM Series
• T7030
• T7040
• T7050
• T7060
• T8.390
• T9.390

1. 1

   Inspect the wiring harness and connectors leading to the #5 rear remote valve for physical damage, corrosion, or loose pins.

2. 2

   Measure the voltage at the remote valve connector to verify if the under-voltage condition is caused by a wiring drop/short or if the controller itself is failing to send the correct voltage.

3. 3

   Swap the electrical connection (or the pilot head itself) with a known-good remote (such as Remote #4) to cross-test. If the fault code changes to the #4 remote, the pilot head is faulty. If the fault remains on #5, the issue is in the tractor's wiring harness or the EHR controller.

4. 4

   Verify that the EHR enable relays and fuses (e.g., fuses 39 or 41 on some models) are intact and providing full power to the low-pressure remote system.

5. 5

   Attempt to recalibrate the valve using the tractor's display monitor, as a valve will sometimes throw errors if it loses its calibration.

1. 1

   Power Down

   Turn off the tractor and disconnect the battery isolator switch to prevent electrical shorts.

2. 2

   Relieve Pressure

   Ensure all hydraulic pressure is relieved from the rear remote stack.

3. 3

   Disconnect Harness

   Unplug the wiring harness from the pilot head on the #5 remote valve slice.

4. 4

   Remove the Pilot Head

   Remove the mounting screws that secure the electronic pilot head to the mechanical spool valve body.

5. 5

   Install New Component

   Install the replacement pilot head and tighten the fasteners to OEM spec. Reconnect the wiring harness.

6. 6

   Calibrate the Valve

   Turn the key on and navigate to the EHR CAL screen on the tractor's instrumentation display. Initiate the calibration sequence for the #5 remote. If calibration fails the first time, stroke the valve back and forth manually (or via the cab lever) to clear any debris, then attempt to calibrate again.

7. 7

   Clear Codes

   Clear the stored NH 4160 fault code from the EHR controller and test the remote with an implement.