Toro Groundsmaster 360 Service Manual page 105

Test Procedure (continued)
Groundsmaster 360
16225SL Rev C
7. Install a tee fitting between the disconnected hydraulic hose and the
transmission fitting. Install a 34,500 kPa (5,000 psi) pressure gauge to the
tee fitting.
8. Disconnect the balancing hose from the transmission fitting closest to
transmission pump outlet fitting for the relief valve to be tested
Figure 46). Install a steel cap on the fitting and steel plug in the balancing
hose.
9. Start the engine and run it at low-idle speed (1,400 rpm). Check for
hydraulic-fluid leaks from the test connections and correct before continuing
the test.
10. Press the engine speed switch to full speed (3,000 rpm) position.
11. Sit on the seat and move the machine against an immovable object (e.g.,
wall) to prevent movement of the machine.
Use extreme caution when performing the test. The drive wheels will
be trying to move the machine during test.
Note: When applying brakes, ensure that the parking brake latch is not
pressed. The engine will stop if the parking brake latch is pressed.
12. Firmly apply brakes to prevent the rear wheels from rotating and then slowly
press the traction pedal in the direction to be tested (forward or reverse).
While pressing the traction pedal, carefully monitor the pressure gauge
needle. As the traction relief valve lifts, the gauge needle will momentarily
stop. Traction system pressure as the relief valve opens should be 26,900 to
28,200 kPa (3,900 to 4,100 psi) in either forward or reverse.
Note: It may be difficult to achieve the traction circuit relief pressure. If the
traction pedal is pressed slowly, it is more likely that the relief pressure can
be obtained.
13. Release the traction pedal to the N
record the test results.
Note: The forward relief valves for the 2 transmission pump circuits are
identical and thus you can interchange them. The reverse relief valves are
also identical. The forward relief valves, however, are different than the
reverse relief valves so do not interchange the forward and reverse relief
valves.
14. If the traction relief valve pressure is not met, release pressure from the
hydraulic system; refer to
(page 4–5). Remove and inspect the relief valve(s) from the transmission;
refer to Servicing the Transmission (page
valve(s).
Note: The traction relief valves are not adjustable.
15. After you complete the testing, ensure that the engine is shut off and then
release pressure from the hydraulic system; refer to
from the Hydraulic System (page
tee fitting from the machine. Connect the pump outlet and balancing hoses
to the transmission fittings.
16. If necessary, repeat the pressure test for other traction-relief valves.
CAUTION
position, shut off the engine, and
EUTRAL
Releasing Pressure from the Hydraulic System
4–98). Clean or replace the relief
4–5). Remove the pressure gauge and
Page 4–47 Hydraulic System: Testing the Hydraulic System
(Figure 45 or
Releasing Pressure