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发表于 2019-7-4 07:33:02
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{"replyTo":"","text":"You can have an air leak on the trailer and the primary air tank will still lose pressure, so the leak may not be on the tractor. Park the truck, pull the red trailer brake valve while leaving the yellow valve pushed in. If the air pressure goes up to normal then the problem is with the trailer. By chance did this just start happening after picking up a different trailer? Keep us posted.","replyToPid":0} |
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