Toro Groundsmaster 4300-D Service Manual page 116

Testing the Rear Wheel Motors (continued)
Hydraulic System: Testing the Hydraulic System
The rear wheel motors will try to move the machine forward.
Use extreme caution when performing the test.
7. Slowly press the traction pedal in the forward direction until 6,900 kPa (1,000
psi) is displayed on the tester pressure gauge. Ensure that the rear wheels
are not rotating and record the flow meter reading.
8. Release the traction pedal, shut off the engine, rotate both the front wheels
90° and then test again. Release the traction pedal, shut off the engine,
rotate both the front wheels 180° and then test again. Use the average of the
3 flow meter readings to judge the front wheel motor performance. Testing
of wheel motor leakage in the 3 different wheel positions will provide the
most accurate test results.
9. Leakage for a rear wheel motor should be less than 4.5 L/minute (1.2
gallons/minute).
10. If specifications are not met, repair or replace the worn wheel motor.
11. After you complete the testing, release pressure from the hydraulic system;
refer to Releasing Pressure from the Hydraulic System (page
12. Disconnect the tester from the hydraulic system.
13. Connect all the disconnected hydraulic hoses and tubes and secure the
hydraulic tubes to the frame.
14. 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.
CAUTION
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4–6).
Groundsmaster ® 4300-D
16226SL Rev C