Hitachi ZAXIS 70 - Replacement of Hydraulic Oil and Filter

MAINTENANCE
7-26
REPLACEMENT OF HYDRAULIC OIL AND
FILTER
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
ure to do so may result in damage to the breaker,
hydraulic oil pump, and other related hydraulic
system components. Recommended changing
intervals are shown below. (For filter replacement
and oil changing intervals are shown below.(For
filter replacement and oil changing procedures,
refer to
“
Hydraulic System in the
“
MAIN
TENANCE
”
Section.)
Changing intervals (Hours)
Attachments
Availability
★
Hydraulic Oil
Full Flow Filter
Element
★★
Element Type
1500
2500
Bucket 100%
4000
1000
Standard Filter Paper
High Performance Element
600 100 Standard Filter Paper Hydraulic
Breaker
100%
1000 300 High Performance Element
★ :
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.
M178-13-004
Excavator Operating Hours
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.
NOTE: ZAXIS80LCK is equipped with a full-flow
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.)
Hours to Replace
Element
Hours to Replace Hy-
draulic Oil
4000 3500
3000 2500 2000
1000
1500 500
0
0
20
40
60
Average
Breaker
Operating
A
vailabilit
y
(%)
80
100
Replacement Interval when using
4000-hour life time hydraulic oil
Replacement Interval when using
2500-hour life time hydraulic oil
: When using high performance ele-
ment (micro-glass)
: When using filter-paper element
Replacement Interval when us-
ing1500-hour life time hydraulic oil
Replacement Intervals (Hours) of Hydraulic Oil and Full Flow Filter Element