Zoomlion ZA14J Operation And Safety Manual page 82

/77℉ higher than the pour point of hydraulic oil.
Changing hydraulic oil
We suggest that changing time of the hydraulic oil is as follows:
a) First changing: operating for 500 hrs after commissioning;
b) Second and subsequent changing: every 2,000 hrs of operation or once a year.
The above recommended intervals are suitable for most applications. Higher temperatures and pressures
will shorten the oil's service life, so the hydraulic oil should be changed sooner than the recommended.
For small load work, the oil change time can be extended.
Cleanliness of hydraulic oil upon delivery is NAS9 (ISO4406 18/15), and for normal operation, the
cleanliness should not be lower than NAS10 (ISO4406 19/16). we suggest that the hydraulic oil should
be checked every 6 months, and the oil should be sampled at least once upon the time for oil changing.
The oil sample can be sent to the hydraulic oil manufacturer or qualified third-party testing agency for
analysis and to determine whether it is still usable.
Changing oil return filter
The oil return filter is recommended to be changed every 1,000 hrs of operation or every year,
whichever comes first. Proper filter condition is essential to good machine performance and service life.
Dirty or clogged filters will affect machine performance and damage components. Under hostile
environment and bad operating conditions, the filter should be checked and replaced more frequently.
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