MAINTENANCE
7-6
PERIODIC REPLACEMENT OF PARTS
To ensure safe and long trouble free operation, be sure to
conduct periodic inspections of the machine. In addition,
the parts as listed below are directly related to safety op-
eration so that they are recommended to be periodically
replaced. These part material properties will change due to
aging, or repeated operation may cause deterioration, wear,
and/or fatigue of these parts, possibly resulting in serious
safety/fire hazards. It is very difficult to gauge the remaining
service lifetime of these parts simply by visual inspection
alone. For this reason, replace these parts at the intervals
shown in the table below. If any of these parts are found to
be defective by inspection, immediately replace it regard-
less of the recommended intervals.
Consult your nearest Hitachi dealer for correct replace-
ment.
Periodic Replacement Parts Replacement Interval
Fuel hose (Fuel tank to filter) Every 2 years or 4000 hours
Fuel hose (Fuel tank to injection pump) Every 2 years or 4000 hours
Engine rubber vibration insulator Every 5 years or 3000 hours
Engine
Pump coupling Every 5 years or 3000 hours
Pump suction hose Every 2 years or 4000 hours
Pump delivery hose Every 2 years or 4000 hours
Swing hose Every 2 years or 4000 hours
Auxiliary hose Every 2 years or 4000 hours
Base Machine
Oil cooler hose (C/V to oil cooler) Every 2 years or 4000 hours
Boom cylinder line hose Every 2 years or 4000 hours
Arm cylinder line hose Every 2 years or 4000 hours
Bucket cylinder line hose Every 2 years or 4000 hours
Hydraulic
System
Front Attachment
Pilot hose Every 2 years or 4000 hours
Seat Belt Every 3 years
NOTE: When replacing a hose, be sure to replace seals, such as O-rings and gaskets, along with the hose.
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