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Troubleshooting gas brake valve failure
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. 1. Dimensional changes and failures 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, no air intake, no air release, or in the open position Do not return, not inflated, no air pressure; When the tappet length becomes shorter, so that the valve body parts open fishing, not air intake, not deflation. 2. Solution When the outside diameter of the tappet becomes larger and the length becomes longer, the test can be carried out after polishing with a fine sandpaper, and the test is repeated until it meets the requirements; when the tappet becomes shorter, the tappet head and the valve body are assembled together. Choose 1 to 2 mm of mat thickness and 1-2 of an ordinary flat washer with an outer diameter of about 18 mm. Of course, the fundamental solution to the problem is to improve the tappet's village quality and dimensional accuracy.