Measuring The Aux Proportional Settings - Kubota KX080-4 Workshop Manual

KX080-4, WSM

(2) Measuring the AUX Proportional Settings

Purpose
• Measuring the maximum amount of oil flow at each step allows an assessment of solenoid valve performance.
• Prior to performing this test, make sure that each attachment is operating at the factory spec. speed and check
the amperage of each solenoid valve.
[Measurement preparations]
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. Connect a vacuum pump.
4. Connect the AUX discharge (high-pressure side) and the IN
side of the flow meter with a test hose.
5. Connect the OUT side of the flow meter and the AUX discharge
(low-pressure side) with a test hose.
6. Remove the vacuum pump.
[Measurement]
1. Open the loading valve of the flow meter all the way and start
the engine.
2. Hydraulic oil temperature of 50 ± 5 °C (122 ± 9 °F).
3. Position each of the switches as follows.
Eco mode
Accelerator dial
switch
Max RPM P mode
4. Operate the meter panel and measure the flow when at each
AUX flow setting step by step.
5. Take three measurements of the oil flow, determine the average
and take that as the measured value.
IMPORTANT
• Do not make a mistake in the oil flow direction or the
direction oil flows into the flow meter.
• Refer to the Operator's Manual for how to set the flow limit
values.
(1) Test Hose
(2) Flow Meter
3-S138
HYDRAULIC SYSTEM
RY9212148HYS0318US0
Auto-idle switch AC switch
OFF OFF
(A) AUX High-Pressure Side
(B) AUX Low-Pressure Side
RY9212148HYS0307US0
KiSC issued 08, 2015 A