Hyundai HX140L, Manual

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7-9
SWING FUNCTION DRIFT CHECK
Measure the swing drift on the bearing
outer circumference when stopping after
a 360
ଟ
full speed swing.
Preparation
Check the lubrication of the swing gear
and swing bearing.
Place the machine on flat, solid ground
with ample space for swinging. Do not
conduct this test on slopes.
With the arm rolled out and bucket rolled
in, hold the bucket so that the height of
the bucket pin is the same as the boom
foot pin. The bucket must be empty.
Make two chalk marks: one on the swing
bearing and one directly below it on the
track frame.
Swing the upperstructure 360˚.
Keep the hydraulic oil temperature at
50
·
5˚C.
Measurement
Conduct this test in the M mode.
Select the following switch positions.
Power mode switch : P mode
Operate the swing control lever fully and
return it to the neutral position when the
mark on the upperstructure aligns with
that on track frame after swinging 360
ଟ
Measure the distance between the two
marks.
Align the marks again, swing 360
ଟ
, then
test the opposite direction.
Repeat steps
ྜ
and
ྜྷ
three times each
and calculate the average values.
Evaluation
Drift angle
Swing start & stop
360 swing
7)
(1)
(2)
ྙ
ྚ
ྛ
ྜ
ྜྷ
ྞ
(3)
ྙ
ྚ
½
ྛ
ྜ
ྜྷ
ྞ
Unit : Degree
The measured drift angle should be within the following specifications.
(4)
Model
HX140 L
Power mode switch
P mode
Standard
90 below
Maximum allowable
157.5
Remarks
14097MS07
21077MS08