Komatsu PC290LC-11 Operation & Maintenance Manual page 356

MAINTENANCE SCHEDULE TABLE MAINTENANCE
For detail, see "METHOD FOR REPLACING ADDITIONAL PILOT FILTER ELEMENT FOR BREAKER (6-32)".
X: Breaker operating ratio (%)
Y: Replacement interval (H)
(A): Hydraulic tank element, pilot filter element
(B):Hydraulic oil
(C):Element of additional filter
REMARK
Breaker operating ratio 100 % means that only the breaker is used
Breaker operating ratio 0 % means that the breaker is not used
Lubrication
When the hydraulic breaker is equipped, lubricate the machine on 100-hour intervals. For detail, see "METHOD
FOR LUBRICATING (4-45)".
4-14