Toro Field Pro 6040 Service Manual page 99

Test Procedure (continued)
Field Pro® 6040
22267SL Rev A
6. Install one hydraulic test hose to the exposed fitting at the traction pump, and
a second test hose to the exposed fitting at the wheel motor.
7. Install a hydraulic tester to the exposed ends of the test hoses. Make sure
the tester is installed in the correct flow direction (toward the wheel motor)
and the tester flow control valve is fully open.
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.
Use extreme caution when performing this test. The rear wheels
will be rotating during the test.
11. Verify the pump flow at No Load as follows:
A. Slowly move the traction control lever for the side being tested to the
fully F
ORWARD
B. Unrestricted pump output should be approximately 54.5 L/minute (14.4
gallons/minute).
C. Release the traction control lever and record the tester pressure and
flow readings.
12. Verify the pump flow Under Load as follows:
A. Slowly move the traction lever for the side being tested to the fully
F position.
ORWARD
B. Apply an additional load of 8,274 to 12,410 kPa (1,200 to 1,800 psi)
by slowly closing the flow meter.
C. Release the traction control lever and record the tester pressure and
flow readings under load.
13. Verify the forward traction relief valve operation as follows:
A. With the traction control lever for the side being tested in the N
position, fully close the flow meter flow control valve.
B. Slowly move the traction control lever for the side being tested in the
F direction.
ORWARD
C. The system pressure should reach approximately 20,600 kPa (2,990 psi)
before the relief valve opens. Record the tester pressure reading.
Note: The relief valve setting is kPa (2,900 psi). An additional kPa (90
psi) is necessary to overcome system charge pressure before the relief
valve opens.
D. Release the traction control lever, open the flow control valve fully, move
the throttle to low speed, and set the key switch to the O
14. If the relief pressure can not be met or is greater than specified, the traction
relief valve is damaged and should be replaced; refer to
(Traction) Pumps (page
15. The under load test flow reading (step 12) should not drop more than 12%
when compared to the no load test flow reading (step 11). A difference of
more than 12% (Under Load > No Load X 0.88) may indicate the traction
CAUTION
position.
5–64).
Page 5–33 Hydraulic System: Testing the Hydraulic System
EUTRAL
position.
FF
Servicing the Piston