Toro Field Pro 6040 Service Manual page 103

Test Procedure (continued)
Field Pro® 6040
22267SL Rev A
8. Start the engine and run it at low-idle speed. Correct any hydraulic fluid leaks
at the test connections before continuing the test.
9. Set the throttle to the full speed (3,575 to 3,725 RPM). Verify the engine
RPM with a non-contact tachometer.
10. Make sure hydraulic fluid is at normal operating temperature by operating the
machine for approximately 5 minutes.
11. Verify the pump flow at No Load as follows:
A. Unrestricted pump output should be approximately 23 L/minute (6.1
gallons/minute)
B. Record the tester pressure and flow readings at no load.
12. Verify the pump flow at Under Load as follows:
Do not close tester valve fully when performing this test. In this
test, the hydraulic tester is positioned before the circuit relief valve.
Pump damage can occur if the fluid flow is completely restricted by
fully closing the tester flow control valve.
A. Monitor the tester pressure gauge carefully while slowly closing the flow
control valve until 5,516 kPa (800 psi) is obtained on the tester pressure
gauge.
B. Record the tester pressure and flow readings under load.
13. Open the flow control valve fully, move the throttle to low speed position and
set the key switch to the O
14. The under load test flow reading (step 12) should not drop more than 15%
when compared to the no load test flow reading (step 11). A difference in flow
of more than 15% (Under Load > No Load X 0.85) may indicate:
A. A restriction in the pump inlet line.
B. The gear pump is worn and should be replaced or repaired; refer to
Pump (page 5–65)
15. After testing:
A. Remove the hydraulic hoses and tester.
B. Install the previously removed hydraulic tube.
C. Check and adjust the level of the hydraulic fluid in the hydraulic reservoir;
refer to the traction unit Operator's Manual.
D. Start the engine and check for any hydraulic fluid leaks. Repair hydraulic
leaks if necessary before returning the machine to service.
CAUTION
position.
FF
or Servicing the Gear Pump (page
Page 5–37 Hydraulic System: Testing the Hydraulic System
Gear
5–67).