New Holland T8010 Manual page 777

STEP 2- Charge Pressure Measurement
- Place the transmission control lever in the "P" park position.
- Start and run the engine at low idle.
- Heat the transmission oil to a minimum of 120°F (49°C).
- Place a piece of cardboard over the oil cooler to help heat the oil.
- Increase the engine speed to 2000 RPM. Record the charge pressure ____________
Charge Pressure Specification: 50 PSI (3.4 bar) Minimum at 2000 RPM engine speed
A. If the correct charge pressure was obtained, the charge system is functioning correctly.
B. If the charge pressure is less than 50 PSI (3.4 bar) check for the following:
Low oil level in transmission.
Lube relief valve spring broke or poppet stuck open.
Inlet suction screen may be plugged. You must drain transmission.
Air leaks on suction side of pump. (Is hydraulic oil aerated?)
Low charge pump flow.
Low regulated pump flow. See Regulated System Pressure Test in this section.
STEP 3- Inspecting the Lube Relief Valve
- If the charge pressure is low, check for broken spring or damaged seat on lube relief valve cartridge.
- If the charge relief is okay, replace the pump.
Section 35 - Hydraulic Systems, 3PT - Chapter 2
2
1. LUBE RELIEF VALVE
2. REMOVE TO ACCESS INLET SCREEN
35-2-20
1
RI02D107