What is the reason for the weak lifting and walking of the ShanGong 50F-2 boom?
1 Answers
The possible reasons include decreased volumetric efficiency of the tandem pump, blocked feedback oil pipe, or operating system failure. Decreased volumetric efficiency of the tandem pump: If there is a noticeable change in throttle size, it is generally due to decreased volumetric efficiency of the tandem pump, and the tandem pump needs to be replaced. Otherwise, check whether the priority valve spool is worn or stuck. If worn, it needs to be replaced; if stuck, it needs to be cleaned. If none of the above conditions are present, check whether the steering feedback oil pipe is blocked. If not blocked, turn the steering wheel after stopping. If it is difficult to turn, it indicates that the steering gear and steering cylinder are normal. Otherwise, the fault may lie in the steering gear or steering cylinder. Such faults must be analyzed and judged by professional maintenance personnel based on the on-site situation. Operating system failure: The ShanGong 50F first goes to the operating system, so first check whether the bucket operates normally. If everything is normal, it indicates that the pilot oil circuit is normal, and the working hydraulic system oil circuit is normal. Then, swap the pilot control oil pipes of the bucket and boom. If the boom returns to normal after swapping, it indicates that the working hydraulic system of the boom is normal, and the problem lies in the stuck or severely worn proportional distribution valve in the pilot valve. The pilot control valve needs to be replaced. Otherwise, the fault lies in the multi-way distribution valve and boom cylinder, and professional personnel are required to diagnose and repair on-site.
