Replacement Of Hydraulic Oil And Filter Element - Hitachi EX27U Operator's Manual

7. Be careful not to hit the breaker against the boom
when operating the arm roll-in and bucket (breaker)
roll-in functions.
REPLACEMENT OF HYDRAULIC OIL AND
FILTER ELEMENT
Using the hydraulic breaker subjects the machine's hy-
draulic system to possible contamination and accelerated
deterioration. Hydraulic filter elements and hydraulic oil
must be replaced more often than with ordinary digging at-
tachment in order to prevent damage to hydraulic pumps
and other hydraulic components. Recommended replace-
ment intervals are as shown below.
Replacement Interval (hours)
Machine with Ordi-
nary Bucket
Machine with Hy-
draulic Breaker
* Hitachi New Landy HN was used.
NOTE: Replacement intervals shown here are for
100% bucket or breaker application. When
breaker /bucket applications are alternated, re-
placement intervals may be extended, depend-
ing upon the percent of time the bucket is ap-
plied.
OPERATING THE MACHINE
Hydraulic Filter
Oil Element
2000* 500
500 100
5-25
WRONG
M586-05-029