Hitachi ZAXIS 135US-5B Operator's Manual page 309

Changing intervals for the standard filter paper
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
f
NOTE: Full-flow filter restriction indicator is optional.
If a filter-paper element is used, this indicator does not
operate.
MAINTENANCE
0 % 10 % 20 %
1000 340 210
2000 1310 980
5000 2030 1270
When using filter-paper element
Element Replacement Intervals
Changing Interval when using 2000-hour life time hydraulic oil
Changing Interval when using 5000-hour life time hydraulic oil
1000 1500 2000
30 % 40 % 50 %
150 120 100
780 650 550
930 730 600
2500 3000 3500
Changing Intervals (hour)
7-35
60 % 70 % 80 %
80 70 60
480 430 380
510 440 390
4000 4500
90 % 100 %
60 50
350 320
350 320
5000
MDAA-07-051