New Holland T8010 Manual page 429

Problem – Differential lock will not disengage
1. Check for PTO fault codes.
A. If fault codes are found, follow procedures outlined in PTO system fault code troubleshooting in this
section.
2. Place the differential lock switch in the ON position. Check the tractor monitor for the differential lock icon in the
instrumentation display.
A. If the differential lock icon is displayed, this is an indication the electrical control circuit is functioning
correctly. Go to step 4.
B. If the differential lock icon is not displayed, this in an indication the electrical control circuit is not
functioning correctly. Check fault codes, controller, and data bus function.
3. Place the differential lock switch in the ON position. Check for 12 VDC at differential lock valve coil.
A. If 12 VDC is available to the coil, the differential lock electrical circuit is functioning properly.
B. If 12 VDC is not found, troubleshoot the differential lock electrical circuit.
1. Check wires 530A (R) and 175E(BK) ground.
2. Check all connections for excessive resistance.
Apply the brakes, this will deactivate the differential lock. Check for 12 VDC at differential lock valve coil.
C. If 12 VDC is available to the coil, the differential lock electrical circuit is not functioning properly.
1. Check left and right brake switches.
D. If 12 VDC is not found the differential lock electrical circuit is functioning properly.
4. Check and repair the differential lock clutch as needed.
Section 25 - Four-Wheel Drive Front Axle - Chapter 2
TROUBLESHOOTING
25-2-14