Toro Groundsmaster 360 Service Manual page 112

Test Procedure (continued)
Hydraulic System: Testing the Hydraulic System
5. Attach a heavy chain to the rear of the machine frame and an immovable
object to prevent the machine from moving during testing.
Before lifting the machine with a jack, review and follow
Instructions (page 1–7).
6. Lift and support the front wheels off the ground to allow flow through the
front wheel motors.
7. Block the rear wheels with chocks to prevent wheel rotation.
8. Clean the transmission area around the traction circuit hoses on the top of
the transmission (Figure
9. Determine which rear wheel motor is to be tested. Disconnect the hydraulic
hose from the transmission pump outlet fitting for the rear wheel motor to
be tested (Figure 49
Wheel Motor to be Tested
Right side rear motor
Left side rear motor
10. Install a 40 GPM hydraulic tester (pressure and flow) in series between the
pump outlet fitting and disconnected hose. Ensure that the tester flow arrow
points from the pump outlet and toward the hose. Ensure that the flow control
valve on the tester is fully open.
11. Disconnect the balancing hose from the transmission fitting closest to the
transmission pump outlet fitting for the rear wheel to be tested (Fig.
49 or Figure 50). Install a steel cap on the fitting and steel plug in the
balancing hose.
12. Start the engine and run it at low-idle speed (1,400 rpm). Check for
hydraulic-fluid leaks from test connections and correct before continuing
the test.
13. With the engine running, press the engine speed switch to full speed (3,000
rpm) position. Use a phototac to measure the engine speed.
The rear wheel that you are testing will try to move the machine
forward.
Use extreme caution when performing the test.
14. While sitting in the operator seat, and with the brakes firmly applied to prevent
the rear wheels from rotating, slowly press the traction pedal in the forward
direction until the tester pressure gauge displays 6,900 kPa (1,000 psi).
15. The rear wheel motor internal leakage is shown on the tester flow meter
in L/minute (gallons/minute).
16. Return the traction pedal to the N
off the engine, and record the test results. Rotate the wheel and test it again.
Note: Testing the wheel motor leakage in 3 different wheel positions will
give the most accurate test results.
IMPORTANT
50).
or Figure 50):
CAUTION
position. Release the brakes, shut
EUTRAL
Page 4–54
Jacking
Pump Outlet
Port A
Port C
Figure
Groundsmaster 360
16225SL Rev C