Toro GreensPro 1240 Service Manual page 67

GreensPro ™ 1240/1260
14211SL Rev A
Use 2 people to perform all the tests, with 1 person in the seat and
the other to read and record the test results.
1. Use the following resources to assist with hydraulic system troubleshooting.
• The Hydraulic Schematic (GreensPro 1260) (page 5–17)
• The Hydraulic Flow Diagrams (page 5–18)
• General and system specific troubleshooting tables in Chapter 3 –
Troubleshooting
2. Always wear the eye protection when you performing hydraulic system tests.
3. Clean the machine fully before you disconnect or disassemble the hydraulic
components.
Note: Cleanliness is required whenever you work on the hydraulic
equipment. Contamination causes too much wear on hydraulic components.
4. To prevent hydraulic system contamination, put metal caps or plugs on any
hydraulic lines left open or exposed during testing or removal of components.
5. The engine must be in good operating condition. Use a non-contact
tachometer (phototach) to verify and monitor engine RPM when performing a
hydraulic test. Engine speed can affect the accuracy of the test readings.
Use the information below when performing hydraulic system tests. If engine
RPM is above or below the specified speed during a test, you will need to
adjust the expected hydraulic performance parameters (aprox. 3% per 100
engine rpm at full throttle).
Hydraulic component output volume relates directly to engine RPM. For
every 100 engine rpm the following component output volumes will change
by the volume listed.
• Traction Pump: 100 engine RPM = 1 liter (34 ounces) of hydraulic fluid
displaced per minute
• Charge Pump: 100 engine RPM = 213 milliliters (7.2 ounces) of hydraulic
fluid displaced per minute
6. When you use a hydraulic tester (pressure and flow), ensure that the inlet and
outlet hoses are properly connected and not reversed to prevent damaging
the hydraulic tester or components.
7. When you use a hydraulic tester (pressure and flow), open the tester load
valve fully before you start the engine to reduce the possibility of damaging
the components.
8. Install the hydraulic fittings by hand and ensure that they are not
cross-threaded before you tighten them with a wrench.
9. Position any test hoses away from parts that may move during the test
procedure.
10. After you connect the test equipment, check the hydraulic fluid level in the
hydraulic tank and ensure that the fluid level is correct.
11. Perform all the hydraulic tests with the hydraulic fluid at normal operating
temperature.
12. Record the results of all hydraulic tests performed.
13. After a hydraulic test procedure has been completed, check the hydraulic
fluid level in the hydraulic tank before returning the machine to service.
IMPORTANT
Page 5–21 Hydraulic System: Testing the Hydraulic System