Measuring Swivel Block Performance - Kubota KX080-4 Workshop Manual

KX080-4, WSM

(2) Measuring Swivel Block Performance

Purpose
• Measure how much the machine slips on sloping ground to asses the performance of the swivel parking brake.
[Measurement when turning]
1. Position each of the switches as follows.
Eco mode
Accelerator dial
switch
Max RPM P mode
2. The position for measurement should be with maximum
extension of the boom cylinder, arm cylinder and bucket
cylinder.
3. Operate the swivel lever with full stroke and while maintaining a
uniform swivel speed, measure the drain volume coming from
the test hose in 1 minute.
4. Measure the drain volume 3 times each left and right, determine
the average and take that as the measured value.
[Measurement preparation]
1. Repeat swivel left and right operations to sufficiently warm up
the swivel motor.
Hydraulic oil temperature
2. Place dirt or a weight of the specified weight (JIS heap x specific
gravity 1.8) in the bucket.
Specified weight
3. Climb onto a slope of 0.35 rad (20 °) but whose surface is even
and swivel the machine so the top is at 1.6 rad (90 °) to the
slope.
4. The front position should be with the arm cylinder fully
compressed and bucket cylinder fully extended, keeping the
boom base pin and the arm end pin at the same height.
5. Place marks on the circumference of the swivel bearing and the
track frame.
CAUTION
• Before commencing measurement, make sure there are no
persons or obstacles within the swivel range.
[Measurement]
1. Position each of the switches as follows.
Eco mode
Accelerator dial
switch
Idling P mode
2. Start the engine, release the safety lock lever (lower) and after
1 minute, measure any deviation between the marks on the
swivel bearing and the track frame.
3. Measure the swing 3 times each right/left with the engine
stopped and at idle and take the average as the measured
value.
3-S149
HYDRAULIC SYSTEM
Auto-idle switch AC switch
OFF OFF
RY9212148HYS0343US0
50 ± 5 °C (122 ± 9 °F)
414 kg (913 lbs)
Auto-idle switch AC switch
OFF OFF
RY9212148MBS0128US0
KiSC issued 08, 2015 A