MAINTENANCE SCHEDULE TABLE
METHOD FOR REPLACING DEF TANK BREATHER ELEMENT ................................................................... 4-62
METHOD FOR CHECKING FAN BELT TENSION AND REPLACING FAN BELT ........................................ 4-63
EVERY 2000 HOURS MAINTENANCE........................................................................................................................ 4-63
METHOD FOR CLEANING HYDRAULIC TANK STRAINER ............................................................................ 4-64
METHOD FOR CHECKING AND RELEASING NITROGEN GAS CHARGE PRESSURE IN ACCUMULA-
TOR (FOR CONTROL CIRCUIT) ...................................................................................................................... 4-65
METHOD FOR CHECKING ALTERNATOR AND STARTING MOTOR .......................................................... 4-68
METHOD FOR CHECKING AND ADJUSTING ENGINE VALVE CLEARANCE............................................ 4-68
METHOD FOR REPLACING KCCV FILTER ELEMENT ................................................................................... 4-68
METHOD FOR REPLACING DEF FILTER .......................................................................................................... 4-71
EVERY 4000 HOURS MAINTENANCE........................................................................................................................ 4-73
REPLACE DEFINED LIFE PARTS ....................................................................................................................... 4-73
METHOD FOR CHECKING WATER PUMP ........................................................................................................ 4-74
METHOD FOR REPLACING ACCUMULATOR (FOR CONTROL CIRCUIT) ................................................. 4-74
METHOD FOR CHECKING FOR LOOSENESS OF ENGINE HIGH-PRESSURE PIPING CLAMP, HARD-
ENING OF RUBBER ........................................................................................................................................... 4-75
METHOD FOR CHECKING FOR MISSING FUEL SPRAY PREVENTION CAP, HARDENING OF RUBBER .
............................................................................................................................................................ 4-75
EVERY 4500 HOURS MAINTENANCE........................................................................................................................ 4-76
REPLACE KCCV HOSE ......................................................................................................................................... 4-76
METHOD FOR CLEANING DEF TANK ................................................................................................................ 4-76
EVERY 5000 HOURS MAINTENANCE........................................................................................................................ 4-76
METHOD FOR CHANGING OIL IN HYDRAULIC TANK ................................................................................... 4-76
EVERY 8000 HOURS MAINTENANCE........................................................................................................................ 4-78
METHOD FOR REPLACING ENGINE HIGH-PRESSURE PIPING CLAMP .................................................. 4-78
METHOD FOR REPLACING FUEL SPRAY PREVENTION CAP .................................................................... 4-78
EVERY 9000 HOURS MAINTENANCE........................................................................................................................ 4-78
METHOD FOR REPLACING DEF HOSE ............................................................................................................ 4-78
END OF SERVICE LIFE ......................................................................................................................................... 4-78
MAINTENANCE INTERVAL FOR HYDRAULIC BREAKER
For machine equipped with a hydraulic breaker, the hydraulic oil deteriorates faster than for normal bucket dig-
ging operations, so set the maintenance intervals as follows.
Replace hydraulic filter element
On a new machine, replace the element after the first 100 to
150 hours, then perform further replacement of the element ac-
cording to the table.
Change oil in hydraulic tank
Change the oil according to the table.
Replace additional filter element for breaker (if equip-
ped)
Use a guideline of 250 hours for use of the breaker (operating
ratio of the breaker: 50% or more), and replace the element ac-
cording to the table.
X: Breaker operating ratio (%)
Y: Replacement interval (H)
(A):Element of hydraulic tank
(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
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