Toro GreensPro 1240 Service Manual page 70

Test Procedure (continued)
Hydraulic System: Testing the Hydraulic System
8. Connect a 0 to 500 psi pressure gauge to the charge circuit test port
9. Connect a 0 to 5000 psi pressure gauge to the pump A port.
10. Start the engine and run it at low-idle speed. Check for hydraulic fluid leaks
from the test connections and correct before continuing the test.
11. Set the throttle to full engine speed (3,600 rpm). Use a non-contact
tachometer (phototach) to verify the engine speed.
12. Run the engine for approximately 10 minutes to warm the hydraulic oil.
13. Record the reading on the pressure gauge at the charge circuit test port.
Charge pressure (without load) should read approximately 550 kPa (80 psi).
If charge pressure specification is not met, consider the following:
A. Test the hydraulic pump flow and pressure relief operation; refer to
Testing the Traction Circuit – Hydraulic Pump Flow and Relief Pressure
Test (GreensPro 1260) (page
B. The hydraulic pump charge relief valve or charge pump is faulty. Repair
or replace the charge relief valve or charge pump; refer to
Hydraulic Pump (GreensPro 1260) (page
14. Sit in the operator's seat, release the parking brake, and slowly depress the
RIGHT motion control pedal until 6895 to 10,350 kPa (1000 to 1500 psi) is
reached on the pressure gauge at the pump A port.
15. Record the reading on the pressure gauge at the charge circuit test port.
Release the motion control pedal, set the throttle to low speed and shut
the engine off.
16. Charge pressure (under load) should not drop more than 20% when
compared to charge pressure (without load) recorded in step . If charge
pressure specification is not met, test the hydraulic pump flow and pressure
relief operation; refer to
and Relief Pressure Test (GreensPro 1260) (page
5–25).
Testing the Traction Circuit – Hydraulic Pump Flow
Page 5–24
Servicing the
5–54).
5–25).
GreensPro ™
14211SL Rev A
1240/1260