Breaker Maintenance - Hitachi ZAXIS 70 Operator's Manual

BREAKER MAINTENANCE

Change Hydraulic Oil and Replace Hydraulic Oil Tank Filter
Hydraulic breaker operation subjects the hydraulic system
to become contaminated faster and to quickly deteriorate
the hydraulic oil. For this reason, hydraulic oil must be
changed and the hydraulic oil tank filter must be replaced
more often than the machine equipped with a bucket. Fail
Attachment
Bucket
Hydraulic
Breaker
* :
Replacement intervals differ depending on the brand of hydraulic oil used. Refer to the Hydraulic System
in the MAINTENANCE section.
** : Use the high performance element (micro-glass) on ZAXIS80LCK.
Hours to Replace
Element
100
80
Average
60
Breaker
Operating
Availability
(%)
40
20
0
0
IMPORTANT: Use a high performance element (mi-
cro-glass) on excavators engaged in
demolition Work (ZAXIS80LCK). In case
using a filter-paper element is unavoid-
able, replace hydraulic oil and the filter
element at the intervals as illustrated
with dotted lines.
OPERATING THE MACHINE
Changing intervals (Hours)
Availability *Hydraulic Oil
1500
100%
2500
4000
100%
1000
Replacement Intervals (Hours) of Hydraulic Oil and Full Flow Filter Element
Hours to Replace Hy-
draulic Oil
Replacement Interval when us-
ing1500-hour life time hydraulic oil
500
1000
Excavator Operating Hours
ure to do so may result in damage to the breaker,
hydraulic oil pump, and other related hydraulic sys-
tem components. Recommended changing intervals
are shown below. (For filter replacement and oil
changing intervals are shown below.(For filter re-
placement and oil changing procedures, refer to the
"Hydraulic System" in the "MAINTENANCE" Sec-
tion.)
Full Flow Filter
Element
1000
600 100
300
Replacement Interval when using
2500-hour life time hydraulic oil
1500
2000 2500
NOTE: ZAXIS80LCK is equipped with a full-flow
5-22
**Element Type
Standard Filter Paper
High Performance Element
Standard Filter Paper
High Performance Element
: When using high performance ele-
ment (micro-glass)
: When using filter-paper element
Replacement Interval when using
4000-hour life time hydraulic oil
3500
3000
filter restriction indicator. However, if a fil-
ter-paper element is used, this indicator
doesn't operate. (Refer to the Hydraulic
System in the Maintenance section.)
4000
M178-13-004