Toro Groundsmaster 4300-D Service Manual page 114

Testing the Front Wheel Motors (continued)
Hydraulic System: Testing the Hydraulic System
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. The total internal leakage for the front wheel motors combined will be
shown on the flow meter. Leakage for the front wheel motors combined
should be less than 11.3 L/minute (3 gallons/minute). Proceed to testing
the rear wheel motor if test results are within specification. If the leakage
specifications are not met, test the front wheel motors individually as follows:
A. Remove the front wheel and wheel shield from the wheel motor that is not
being tested to get access to the hydraulic tubes and fittings on the wheel
motor. Remove the R-clamps that secure the hydraulic tubes to the frame.
B. Clean and disconnect hydraulic lines from the front wheel motor that is
not being tested. Cap the disconnected hydraulic lines and plug the ports
of the disconnected wheel motor to prevent contamination.
C. Repeat the procedure described in steps
front wheel motor leakage. The flow should be less than 5.7 L/minute
(1.5 gallons/minute) for the tested wheel motor.
D. If testing is required for other front wheel motor, complete steps A, B, and
C for the remaining front wheel motor.
E. If specifications are not met, repair or replace the worn wheel motor.
10. After you complete the testing, release pressure from the hydraulic system;
refer to Releasing Pressure from the Hydraulic System (page
11. Disconnect the tester from the hydraulic system.
12. Connect all the disconnected hydraulic hoses and tubes and secure the
hydraulic tubes to the frame.
13. Install the wheel shield and wheels; refer to
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.
Page 4–52
6 through 8 to identify individual
4–6).
Wheels (page 6–5).
Groundsmaster
16226SL Rev C
® 4300-D