Measuring Travel Block Performance - Kubota KX080-4 Workshop Manual

KX080-4, WSM

(2) Measuring Travel Block Performance

Purpose
• Measure how much the machine slips on sloping ground to asses the performance of the parking brake.
[Measurement when turning]
1. Position each of the switches as follows.
Travel speed Accelerator
switch dial
1st Max RPM
2nd Max RPM
2. Operate the travel lever on the side to be measured full stroke
and while maintaining a uniform travel speed, measure the drain
volume coming from the test hose in 1 minute.
3. Measure the drain volume 3 times each in 1st and 2nd speeds,
determine the average and take that as the measured value.
[Measurement when locked]
1. Position each of the switches as follows.
Travel speed Accelerator
switch dial
1st Max RPM
2nd Max RPM
2. Lock the travel, slowly operate the travel lever forwards and
backwards full stroke and measure the drain volume from the
test hose in 1 minute.
3. Measure the drain volume 3 times each in 1st and 2nd speeds,
determine the average and take that as the measured value.
IMPORTANT
• The drain volume can vary greatly depending on the
position of the internal parts (pistons and barrel), so adjust
the motor position and take the measurement where it
drains the least.
[Measurement preparation]
1. Repeat left and right travel operations to sufficiently warm up
the travel motor.
Hydraulic oil temperature
2. Climb onto a slope of 0.35 rad (20°) but whose surface is even.
3. Stop the machine on the slope, and set the front to travel
position.
[Measurement]
1. Place the travel lever in neutral and stop the engine.
2. Make marks in the track frame and crawler, and measure the
slippage after ten minutes.
3-S152
HYDRAULIC SYSTEM
Eco mode Auto-idle
switch switch
P mode OFF
P mode OFF
Eco mode Auto-idle
switch switch
P mode OFF
P mode OFF
RY9212148HYS0379US0
50 ± 5 °C (122 ± 9 °F)
RY9212148MBS0134US0
AC switch
OFF
OFF
AC switch
OFF
OFF
KiSC issued 08, 2015 A