OPERATING THE MACHINE 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 hy- draulic 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. Failure 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 replace- ment and oil changing intervals are shown below.(For fil- ter replacement and oil changing procedures, refer to the “Hydraulic System” in the “MAINTENANCE” Section.) Changing intervals (Hours) * : Replacement intervals differ depending on the brand of hydraulic oil used. Refer to the Hydraulic System in the MAIN- TENANCE section. ** : Use the high performance element (micro-glass) on excavators engaged in demolition work. Replacement Intervals (Hours) of Hydraulic Oil and Full Flow Filter Element Hours to Replace Element Hours to Replace Hydraulic Oil 100 : When using high performance element (micro-glass) :
When using filter-paper element 80 Replacement Interval when using 1500-hour life time hydraulic oil Average Breaker Operating Availability (%) 60 Replacement Interval when using 2500-hour life time hydraulic oil 40 Replacement Interval when using 5000-hour life time hydraulic oil 20 4000 3000 2000 1000 0 0 5000 Excavator Operating Hours IMPORTANT: Use a high performance element (micro- glass) on excavators engaged in demolition work. In case using a filter-paper element is unavoidable, replace hydraulic oil and the filter element at the intervals as illustrated with dotted lines. NOTE: Full-flow filter restriction indicator is optional.
If a filter-paper element is used, this indicator doesn’t operate. (Refer to the Hydraulic System in the Maintenance section.) 5-24 Attachment Availability *Hydraulic Oil Full Flow Filter Element **Element Type Bucket 100% 1500 1000 Standard Filter Paper High Performance Element 2500 5000 Hydraulic Breaker 100% 600 100 Standard Filter Paper 1000 300 High Performance Element