The lifting of Jinma hydraulic oil in the Yellow Sea was interrupted after it was filled with oil.

Insufficient pressure. Huanghai Jinma is a tractor produced by Ma Hengda Da Yue Company, starting with 1959. It is a high-tech enterprise mainly engaged in the production and sales of tractors and agricultural machinery and their accessories. The intermittent lifting of tractor hydraulic oil after refueling is caused by insufficient pressure, and the solution is to increase the pressure. The tractor has a wide field of vision and convenient operation. It adopts hydraulic walking braking system and handle-operated parking braking system, which is deeply loved by the masses.