I have a dual cylinder mast, the forks will lower by them self. This happens with the engine running and off. There is no difference in speed with either. If there is a load it will lower faster.
Since there are two cylinders I do not think this is a piston seal blow by problem. What type of return to center or check valve is on this type of fork truck. I do not have a hydraulic diagram or maintenance manual. This is the reason for the question. Any help is greatly appreciated.
Kubota D, 12k hours, 5 years old.