Hitachi ZAXIS 30U-5N Operator's Manual page 213

Change Hydraulic Oil and Replace Full-Flow Filter
Element
Hydraulic breaker operation subjects the hydraulic system
to become contaminated faster and to quickly deteriorate
the hydraulic oil.
Failure to adhere to proper maintenance intervals may
result in damage to the base machine and the breaker.
In order to extend the service life particularly of the
hydraulic pump, change the hydraulic oil and the full-flow
filter element at the specified frequency given below.
(Refer to the "Hydraulic System" in the "MAINTEMANCE"
chapter.)
Changing intervals differ depending on the brand. (Refer to
the "Hydraulic System")
Changing intervals for the high performance element (micro-glass)
Breaker Operating
Availability
Full-Flow Filter
Hydraulic oil: 1500 hours
life time
Hydraulic oil: 3000 hours
life time
100
90
80
70
60
50
40
30
20
10
0
0 200 400
MAINTENANCE
0 % 10 % 20 %
1000 670 510
1500 1260 1100
3000 2300 1850
When Using High Performance Element
Element Replacement Intervals
600 800 1000 1200
Changing Intervals (hour)
30 % 40 % 50 %
410 340 290
980 895 820
1500 1250 1080
Changing Interval when using 1500-hour life time Hydraulic Oil
Changing Interval when using 3000-hour life time Hydraulic Oil
1400 1600 1800 2000
7-33
60 % 70 % 80 %
250 215 195
760 700 640
935 800 710
2200 2400 2600 2800
90 % 100 %
180 170
600 560
630 560
3000
MADB-13-043