Toro Sand Pro 3040 Service Manual page 112

Test Procedure (continued)
Hydraulic System: Testing the Hydraulic System
correct flow direction (away from the pump) and the tester flow control valve
is fully open.
6. Start the engine and run it at low-idle speed. Correct any hydraulic fluid leaks
at the test connections before continuing the test.
7. Set the throttle to the full speed (3,400 to 3,500 RPM). Verify the engine
RPM at the drive hubs or rubber coupling with a non-contact tachometer
(phototach).
8. Make sure hydraulic fluid is at normal operating temperature by operating the
machine for approximately 10 minutes.
9. Verify the pump flow at No Load as follows:
A. Unrestricted pump output should be approximately 19 LPM (5 GPM).
B. Record the tester pressure and flow readings at no load.
10. Verify the pump flow Under Load as follows:
Do not close tester valve fully when performing this test. In this
test, the hydraulic tester is positioned before the circuit relief valve.
Pump damage can occur if the fluid flow is completely restricted by
fully closing the tester flow control valve.
A. Monitor the tester pressure gauge carefully while slowly closing the flow
control valve until 5,516 kPa (800 psi) is obtained on the tester pressure
gauge.
B. Record the tester pressure and flow readings under load.
C. Open the tester flow control valve fully.
11. Verify the circuit relief valve operation as follows:
When performing the test, do not allow the tester pressure to
exceed 8300 kPa (1400 PSI).
Hold the lift lever in the fully raised position or hold the steering
wheel at the fully locked position only long enough to obtain a
system pressure reading.
A. Open the circuit relief valve via the lift system. Watch the pressure gauge
on the tester and move the lift lever to the R
hold the lever with the hitch fully raised causing the circuit relief valve to
open. Record the pressure at which the relief valve opens.
B. On model 08745 machines, open the circuit relief valve via the steering
system. Watch the pressure gauge on the tester and turn the steering
wheel completely in one direction. The circuit relief valve should open just
after the front wheel gets to the full lock position. Record the pressure at
which the relief valve opens.
CAUTION
CAUTION
IMPORTANT
Page 5–42
position. Momentarily
AISE
Sand Pro ® 3040 and 5040
20251SL Rev A