Treatment of failure of the small four-wheel brake valve

The air brake valve tappet of the small four-wheel tractor is made of plastic, and its outer diameter and length are often easily affected by thermal expansion and contraction, resulting in failure of the air brake valve.

When the outside diameter of the tappet becomes larger, a stuck failure occurs in the air brake valve housing, so that the valve body assembly cannot be opened, the air intake is not released, the air is not released, or it is not returned in the open position and is not inflated. , No air pressure; When the length of the tappet becomes shorter, the valve body is opened for fishing, no air intake, no air deflation.

When the outside diameter of the tappet becomes larger and the length becomes longer, the test can be carried out after being lightly polished with fine sandpaper until it meets the requirements; when the tappet becomes shorter, the gap between the tappet head and the valve body assembly is selected. The thickness of 1mm ~ 2mm, the outer diameter of phi 18mm about 1 to 2 ordinary flat gasket can be. Of course, the fundamental solution to the problem is to increase the material and dimensional accuracy of the tappet.

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