Toro Sand Pro 3040 Service Manual page 94

Hydraulic System: Testing the Hydraulic System
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 in
• Hydraulic Flow Diagrams (page 5–13)
• 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 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 phototach
(non-contact tachometer) 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 (P1): 100 engine RPM = 1.5 liters (50 ounces) of hydraulic
fluid displaced per minute
• Implement/Charge Pump (P2): 100 engine RPM = 0.5 liters (18 ounces) of
hydraulic fluid displaced per minute.
• Attachment Pump (P3) (optional): 100 engine RPM = 0.6 liters (21 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 test equipment 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.
IMPORTANT
Appendix A (page A–1)
IMPORTANT
Page 5–24 Sand Pro ® 3040 and 5040
20251SL Rev A