Toro Groundsmaster 4300-D Service Manual page 120

Test Procedure (continued)
Hydraulic System: Testing the Hydraulic System
14. If the relief pressure can not be met or is greater than specified, the traction
relief valve is damaged and should be replaced.
15. The under load test flow reading (step 12C) should not drop more than 12%
when compared to the no load test flow reading (step 11B). A difference of
more than 12% may indicate the piston pump/hydrostat is worn and should
be repaired or replaced.
16. After you complete the testing, disconnect the tester and connect the hose to
the pump fitting.
17. Start the engine, check for hydraulic-fluid leaks, repair any leaks as required,
and fill the hydraulic tank with the correct quantity of new hydraulic fluid
before returning the machine to service.
Page 4–58 Groundsmaster ® 4300-D
16226SL Rev C