New Holland T8010 Manual page 779

STEP 2- Regulated System Leakage Test
A regulated system leak can be identified by a slight drop in regulated pressure at low engine RPM. As a regulated
circuit is engaged and disengaged, the pressure reading on the gauge will dip slightly as each circuit is actuated.
IMPORTANT: If the regulated pressure did not dip as a circuit is actuated, then that circuit is not functioning.
Inspect the solenoid valve, electrical system connections and circuit fault codes for that system before proceeding.
- Heat the transmission oil to 120°F (49°C).
- Start testing with the PTO and Diff Lock in the OFF position and the FWD switch in the ON position.
- Maintain the engine speed at 1000 RPM and record the pressure displayed on the tractor monitor.
•
Regulated Circuit Baseline Pressure______________kPa at 1000 RPM
Record the regulated pressure as each circuit is engaged. Once the reading is recorded, disengage the circuit.
FWD CIRCUIT
A. Turn the FWD OFF and back ON.
Pressure Reading with FWD OFF at 1000 RPM:____________
NOTE: The FWD is spring engaged and hydraulically disengaged, so the pressure reading is taken with the FWD
OFF.
If the pressure dipped when the circuit was actuated, but does not return to the Regulated Circuit Baseline
Reading the FWD clutch is leaking.
If the pressure does not dip when the circuit is actuated check the solenoid function and electrical system
connections. See FWD and Diff Lock System Section and double check for fault codes on the PTO
controller.
If the pressure dipped when the circuit was actuated and returns to the Regulated Circuit Baseline
Reading, the FWD clutch is okay. Continue with Item B.
NOTE: The FWD and Diff Lock are controlled by PTO controller.
DIFF LOCK CIRCUIT
B. Turn the Diff Lock ON and back OFF.
Pressure Reading with Diff Lock ON at 1000 RPM:____________
If the pressure dipped when the circuit was actuated, but does not return to the Regulated Circuit Baseline
Reading the Diff Lock clutch is leaking.
If the pressure does not dip when the circuit is actuated check the solenoid function and electrical system
connections. See FWD and Diff Lock System Section and double check for fault codes on the PTO
controller.
If the pressure dipped when the circuit was actuated and returns to the Regulated Circuit Baseline
Reading the Diff Lock clutch is okay. Continue with Item C.
NOTE: The FWD and Diff Lock are controlled by PTO controller.
Section 35 - Hydraulic Systems, 3PT - Chapter 2
35-2-22