Hitachi ZAXIS 135US-5B Operator's Manual page 308

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.
Check machine service hours by using the breaker hour
meter. (Refer to the Breaker Operation in the "OPERATOR'S
STATION" chapter.)
Changing intervals for the high performance element (micro-glass)
Breaker Operating
Availability
Full-Flow Filter
Hydraulic oil: 2000 hours
life time
Hydraulic oil: 5000 hours
life time
100
90
80
70
60
50
40
30
20
10
0
0 500
MAINTENANCE
0 % 10 % 20 %
1000 670 510
2000 1590 1320
5000 2790 1930
When Using High Performance Element
Element Replacement Intervals
Changing Interval when using 2000-hour life time hydraulic oil
1000 1500 2000
30 % 40 % 50 %
410 340 290
1130 990 880
1480 1200 1010
Changing Interval when using 5000-hour life time hydraulic oil
2500 3000 3500
Changing Intervals (hour)
7-34
60 % 70 % 80 %
250 230 200
790 710 650
870 760 680
4000 4500
90 % 100 %
190 170
600 560
610 560
5000
MDAA-07-050