Edition 2 Chapter 1 Page 1-24
Feb/2013 Maintenance and Service
When the crane is new, change the gear oil after the crane operates the first
250 hours.
1.14 HYDRAULIC OIL
When the crane comes out of the factory, the hydraulic tank is topped up with
hydraulic oil.
The controls on the crane are hydraulically operated.
The most important item for the usual operation of the crane is the quality
viscosity of the hydraulic oil used in the crane. Also important is how
clean you keep the oil.
A lack of knowledge of (ignorance to) the hydraulic oil replacement
schedule can cause different components to malfunction and greatly
decrease the service life of the crane.
Zoomlion cannot be legally responsible for the damage you cause when
you do not obey the data in this manual with reference to: oil and oil filter
change.
Figure 1-16 Filtering – Changing Intervals
A. Changing Steps
(1) Remove and replace the hydraulic oil in the hydraulic tank as follows:
(a) Remove the drain plug at the bottom of the tank.
(b) Remove the master oil return pipe.
(c) Carefully clean the oil tank and filter with a chemical cleaning agent
(solid particle pollution grade ≤ 18/15).
(d) After the tank is dry, clean the tank with new hydraulic oil (solid
particle pollution grade ≤ 18/15).
(e) Drain the oil used to clean the tank.
(f) Fill the tank with new hydraulic oil.
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