6-7
TRAVEL DEVIATION
Measure the deviation by the tracks from
a 20m straight line.
Preparation
Adjust the tension of both tracks to be
equal.
Provide a flat, solid test yard 20m in
length, with extra length of 3 to 5m on
both ends for machine acceleration and
deceleration.
Hold the bucket 0.3 to 0.5m above the
ground with the arm and bucket rolled in.
Keep the hydraulic oil temperature at 50
Ü
5
Á
C.
M
M
easurement
Measure the amount of mistracking at
high and low travel speeds.
Start traveling the machine in the
acceleration zone with the travel levers at
full stroke.
Measure the distance between a straight
20m line and the track made by the
machine.(Dimension a)
After measuring the tracking in forward
travel, turn the upperstructure 180
Á
and
measure that in reverse travel.
Repeat steps
Ι
and
Κ
three times and
calculate the average values.
E
E
valuation
0.3~0.5m
5)
(1)
(2)
Η
Θ
Ι
Κ
(
(
3)
Η
Θ
Ι
Κ
Λ
Mistrack should be within the following specifications.
3~5m extra length
3~5m extra length
20M
a
Model
R35Z-7
Standard
200 below
Maximum allowable
240
Remarks
((4)
R35Z76MC04
7-7(2) 140-7
Unit : mm / 20m
