New Holland EHR 4160 – EHR (Electro-Hydraulic Remote): Rear Remote No.5 - Under Voltage

The control module is receiving a voltage signal from the number 5 rear electro-hydraulic remote valve (or its corresponding control circuit) that has dropped below the minimum acceptable threshold. This condition is typically caused by an open circuit, a short to ground, a loss of the 5.0V sensor reference supply, or a failed internal potentiometer within the valve's electronic head or the in-cab control switch.

• T6 Series
• T6000 Series
• T7 Series
• T7000 Series
• T8 Series
• T9 Series
• TS-A Series

1. 1

   Visually inspect the wiring harness and electrical connector at the No. 5 rear remote valve slice on the rear hydraulic stack for corrosion, moisture intrusion, bent pins, or chafed wires.

2. 2

   Check for the presence of the 5.0 Volt sensor supply voltage and a solid ground at the No. 5 remote valve connector.

3. 3

   Perform a component isolation (swap) test by swapping the electrical connector from the No. 5 remote valve to an adjacent known-good valve (such as Remote No. 4). If the fault code changes to the corresponding code for the other valve (e.g., EHR 4146), the issue is internal to the No. 5 valve slice. If the code remains EHR 4160, the issue lies in the tractor's wiring harness, the in-cab switch, or the EHR controller itself.

4. 4

   Test the in-cab EHR joystick or paddle switch for the No. 5 remote to ensure it is outputting the correct variable voltage and does not have an open circuit.

1. 1

   Depressurize and Power Down

   Turn off the tractor, relieve all hydraulic pressure from the rear remotes, and disconnect the battery to prevent electrical spikes.

2. 2

   Address Wiring

   If the diagnostic checks revealed a wiring fault, clean the connector with contact cleaner or repair the damaged section of the EHR harness.

3. 3

   Replace the In-Cab Switch

   If the switch is faulty, remove the armrest/console trim panels, unplug the defective switch, and snap the new switch into place.

4. 4

   Replace the Remote Valve

   Unbolt the No. 5 remote valve slice from the rear hydraulic valve manifold stack. Install the new electro-hydraulic remote valve slice, ensuring all O-rings are properly seated between the slices. Torque the tie-bolts to OEM specifications and reconnect the hydraulic lines and electrical connector.

5. 5

   Reassembly and Calibration

   Reconnect the battery and power on the tractor. You must perform the EHR valve calibration procedure using the tractor's monitor or a diagnostic tool. The system needs to learn the new valve's uncalibrated spool movement limits and neutral set point (otherwise, it will throw calibration codes like EHR 4170 or 4220).