Toro GreensPro 1240 Service Manual page 73

Test Procedure (continued)
GreensPro ™ 1240/1260
14211SL Rev A
B. Record the tester pressure and flow readings. No Load pump output
should be approximately 34 lpm (9 gpm).
9. Verify the pump flow Under Load as follows:
A. With the RIGHT motion control pedal at the full forward position, apply
an additional load of 7,600 kPa (1,100 psi) by slowly closing the tester
flow control valve.
B. Record the tester pressure and flow readings.
C. Return the motion control lever to the neutral position, engage the parking
brake, set the throttle to low engine speed, and shut off the engine.
10. The under load test flow reading (step 9C) should not drop more than 25%
when compared to the no load test flow reading (step 8B). A difference of
more than 30% may indicate the hydraulic pump is worn and should be
repaired or replaced.
11. Verify the RIGHT traction relief valve operation as follows:
A. Start and run the engine at 3600 RPM.
B. Sit in the operator's seat, disengage the parking brake and slowly press
and hold the RIGHT motion control pedal at the full forward position.
C. Slowly close the tester flow control valve while watching the tester
pressure gauge.
The system pressure should reach 15,860 to 17,240 kPa (2,300 to 2,500
psi) before the relief valve opens.
Note: The relief valve setting is 16,000 kPa (2,320 psi). An additional
690 to 1,030 kPa (100 to 200 psi) is necessary to overcome the system
charge pressure before the relief valve opens.
D. Record the tester pressure reading.
E. Open the tester flow control valve fully, engage the parking brake, set the
throttle to low engine speed, and shut off the engine.
12. Verify the LEFT traction relief valve operation as follows:
A. Disconnect the hydraulic tester form the hydraulic hoses.
To prevent hydraulic tester damage, make sure that the oil flow
direction indicator on the tester is installed so the oil will flow
from the disconnected motor A port hydraulic hose, through the
tester and into the disconnected motor B port hydraulic hose.
B. Install the hydraulic tester in series with the disconnected hoses.
C. 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.
D. Set the throttle to full engine speed.
E. Sit in the operator's seat, disengage the parking brake and slowly press
and hold the LEFT motion control pedal at the full forward position.
F. Slowly close the tester flow control valve while watching the tester
pressure gauge.
IMPORTANT
Page 5–27 Hydraulic System: Testing the Hydraulic System