MAINTENANCE
7-13
PERIODIC REPLACEMENT OF RUBBER
HOSES
CAUTION: Rubber hoses, such as hydraulic
hoses, lubrication hoses, fuel hoses, and heater
hoses, may break due to aging, fatigue, and abra-
sion, possibly resulting in serious injury or death.
In order to avoid serious personal injury, be sure
to replace the hoses listed in the following table
every two years, or 8000 hours of operation,
whichever comes first. Use genuine Hitachi parts.
It is very difficult to gauge the extent of deteriora-
tion due to aging, fatigue, and abrasion of rubber
hoses by inspection alone. Thus, if rubber hoses
are not replaced periodically, serious personal in-
jury may result due to falls of the front, penetra-
tion of high pressure oil into the skin, or fire.
Regardless of regular replacement intervals, if
hoses are found to be defective by periodic in-
spection (refer to pages 7-62 to 7-64), be sure to
repair or replace them before operating the ma-
chine. Be sure to replace seals, such as O-rings
and hose clamps along with replacing hoses.
Consult your authorized dealer for correct hose
replacement.
Hydraulic Hoses
Hoses Q’ty in Use
Pump to High Pressure Filter (1) 3
High Pressure Filter to Control Valve (2) 6
Control Valve to Front (3) 1
Oil Cooler to Hydraulic Oil Tank (4) 2
M18C-07-058
MOOOOOOO
M18C-07-059
M18C-07-060
M18C-07-061
1
22
3
4
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