Operation and maintenance manual

Operation
3-37
DX140R/DX140LCR
Hydraulic Oil and Filter Service Intervals
When using a hydraulic breaker, the viscosity breakdown and
co
ntamination of hydraulic oil is faster because the work
condition is more severe than during normal digging work. To
prevent the hydraulic components (especially pump) from
having a shortened life cycle, replace the hydraulic oil and main
hydraulic oil return filter using the following schedule.
NOTE: The
r
eplacement intervals of hydraulic oil and filter
depend upon the amount of time the hydraulic
breaker is being used. These intervals must be
followed as opposed to regularly scheduled
maintenance.
Attachment Operation Rate Hydraulic Oil Filter
Bucket Work 100% 2,000 Hours
250 Hours (First Replacement)
1,000 Hours (After First Replacement)
Hydraulic Breaker
Work
100% 500 Hours 100 Hours
* These service intervals only apply, when a genuine DOOSAN o
il an
d filter are used. If any other brands
are used, the guaranteed changed interval must be reduced in half.
MACHINE OPERATING HOURS
2000
15001000
5000
20
40
60
80
100
BREAKER OPTION RATE (%)
(After First Replacement)
FILTER
FILTER
(First Replacement)
HYDRAULIC OIL
1658
1400
1196
1028
893
782
692
614
551
105 116
144
171
214
275
335
412
500
635206
175
156
128
137
112
119
106
FG000767
Figure 85