Kubota KX080-4 Workshop Manual page 296

KX080-4, WSM
 If measuring the flow of P3 (gear pump)
1. Place the mini excavator on flat hard ground, lower the bucket and the blade, and stop the engine.
2. Follow the chapter Releasing Pressure in the Hydraulic System and release pressure in the hydraulic lines.
3. Use the vacuum pump and attach a pressure gauge to the pressure test port.
4. Disconnect the P3 delivery hose on the pump side and plug the disconnected hose.
5. Connect a test hose to the P3 discharge port and connect to the flow meter on the IN side.
6. Disconnect the return hose from the oil cooler OUT side on the return pipe side and plug the disconnected hose.
7. Use a test hose to connect the return pipe and the OUT side of the flow meter.
8. Remove the vacuum pump and bleed air from the pump and make sure there are not any oil leaks in any of the
lines.
[Measurement]
1. Open the loading valve of the flow meter all the way and start the engine.
2. Bring the hydraulic oil temperature to 50 ± 5 °C (122 ± 9 °F).
3. Position each of the switches as follows.
Accelerator dial
Max RPM
4. Gradually close the flow meter's loading valve until it reaches the main LS relief pressure, then measure the oil
flow and engine RPM at each pressure.
5. Take three measurements of the oil flow, determine the average and take that as the measured value.
6. Convert the measured value to what it would be with the engine at its rated RPM.
Eco mode switch
P mode
3-S137
Auto-idle switch
OFF
HYDRAULIC SYSTEM
RY9212148HYS0316US0
AC switch
OFF
RY9212148HYS0317US0
KiSC issued 08, 2015 A