PERIODIC REPLACEMENT OF DEFINED LIFE PARTS
For using the machine safely for an extended period of time, you must periodically replace the safety critical and
fire prevention-related parts listed in the table of the defined life parts.
Material quality of these parts can change as time passes and they are likely to wear out or deteriorate. Howev-
er, it is difficult to determine the extent of wear or deterioration at the time of periodic maintenance. Hence, it is
required to replace them with new ones regardless of their condition after a certain period of usage. This is im-
portant to ensure that these parts maintain their full performance at all times.
Furthermore, should anything abnormal be found on any of these parts, replace it with a new one even if the
periodic replacement time for the part has not yet arrived.
If any of the hose clamps show deterioration like deformation or cracking, replace the clamps at the same time
as the hoses.
Also perform the following checks with hydraulic hoses which need not to be replaced periodically. Tighten all
loose hoses and replace defective hoses, as required.
When replacing hoses, always replace O-rings, gaskets, and other such parts at the same time.
Have your Komatsu distributor replace the defined life parts.
DEFINED LIFE PARTS LIST
No.
Periodical replacement parts Replacement interval
1 Fuel system Fuel hose
Spill hose
Every 2 years or 4000 hours, which-
ever comes sooner
2
Engine lubrication
system
Turbocharger lubrication hose
Engine oil filter hose
3 Work equipment hy-
draulic system
Work equipment pump delivery hose
Work equipment pump LS hose
Hydraulic drive fan hose (Intake fan)
HSS line hose
Suction hose
External work equipment hose
• Blade lift hose
• Blade tilt hose
• Blade pitch hose
• Blade angle hose
• Ripper lift hose
4 Others PPC accumulator
Seat belt
Every 3 years from start of usage or
5 years after manufacturing of seat
belt, whichever comes sooner.
PERIODIC REPLACEMENT OF DEFINED LIFE PARTS REPLACEMENT PARTS
7-2
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