Xinjiang rescue case Object: Sany 25T crane

Customer's Name: Mr. Kuang Crane Fault Description: The throttle automatically increases when getting on the car, and the engine speed automatically increases in a short time when the car is rotated

Maintenance personnel: Xiao Xingwang, Zhou Yong 2 people

Repair time: 3 hours

Description of the maintenance process: After the customer called the Sany 4008 hotline, the 24-hour hoisting rescue ECC center immediately dispatched the service engineer to the scene within 2 hours, and the service engineer preliminarily determined that the electronic accelerator pedal was faulty or the output signal of the electronic accelerator pedal was disturbed and changed, and the power supply and output signal of the accelerator pedal were measured by static, and the output signal of the electronic accelerator pedal was measured during rotation, and it was found that there was an instantaneous increase, and then it returned to normal; When the conductive ring shell is opened, it is found that there are a large number of powdery iron filings generated by friction in the copper ring groove, and the connecting rod drives the iron filings to scatter outward when rotating; Clean the iron filings with anhydrous alcohol, install the conductive ring after air drying, and remove the equipment failure.

Maintenance cost: 24-hour on-site free rescue

Repair result: all faults are eliminated