Breaker Maintenance - Hitachi Zaxis 850LC-3 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 deteriorate the hydraulic
oil quickly. For this reason, hydraulic oil must be changed and
the hydraulic oil tank filter must be replaced more often than
the machine attached with a bucket. Failure to do so may re-
sult in damage to the breaker, hydraulic oil pump, and other
hydraulic system components. Recommended changing inter-
vals are shown below. (For filter replacement and oil changing
procedures, refer to the "Hydraulic System" in the "MAINTE-
NANCE" Section.)
Changing Interval (hours)
Machine with
Hydraulic Breaker
Hydraulic Oil
Filter Element
NOTE: *The above figures are for 100% breaker time share.
When the breaker time share is less, changing intervals
can be extended as shown in the diagram below.
Be sure to replace elements when breaker has been op-
erated for 100 hours continuously.
Breaker
Time
Sharing
(%)
Time to replace
filter element
OPTIONAL ATTACHMENTS AND DEVICES
Machine with
Ordinary Bucket
600* 1500 or 2500 or 4000
100* 1000
Time to change
hydraulic oil 1500
hours changing
interval
Time to change
hydraulic oil 2500
hours changing
Time to change
interval
hydraulic oil 4000
hours changing
interval
Changing Interval (Hours)
13-9
M1J1-13-011