Toro Greensmaster 3120 Service Manual page 92

Traction Circuit Testing – Wheel Motor Efficiency Test
(continued)
Hydraulic System: Testing the Hydraulic System
6. Install tester in series with the pump and the disconnected hose. Make sure
the tester is installed in the correct flow direction and the tester flow control
valve is fully open.
7. Disconnect hydraulic lines from front wheel motor that is not being tested.
Cap disconnected hydraulic lines and plug ports in wheel motor to prevent
contamination.
8. Chock front wheel being tested to prevent wheel rotation.
9. Start engine. Move throttle to full speed (2850 ± 50 RPM).
10. Make sure hydraulic fluid is at normal operating temperature by operating the
machine for approximately 10 minutes.
11. Verify and record engine speed with a phototach.
Use extreme caution when performing this test. The wheel motor
being tested will be trying to move the machine forward.
12. Sit in the operators seat, release the parking brake, and slowly depress
forward traction pedal until 6890 to 10340 kPa(1000 to 1500 PSI) is
displayed on the flow meter pressure gauge. The flow meter should read
less than 2.4 LPM (0.6 GPM).
13. Release traction pedal, shut engine off, and record test results.
14. Rotate the wheel motor being tested 90 degrees and retest.
15. Rotate the wheel motor being tested 180 degrees and retest.
16. If the wheel motor allows more than the specified flow, the wheel motor is
worn and should be repaired or replaced.
17. Reconnect hydraulic lines to front wheel motor and repeat procedure for
remaining front wheel motor.
18. Check fluid level in hydraulic tank and adjust as necessary; refer to traction
unit Operator's Manual.
CAUTION
Page 4–46 Greensmaster 3120
17230SL Rev C