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Message: <blockquote data-quote="skidsteer.ca" data-source="post: 21828" data-attributes="member: 307">Also, the angle on the pins or plate where the two meet each other may be incorrect and when the pressure gets high the pins wants to slide up because the angle is not "flat" enough.When you look at the bottom of the pin from the side of the QA the pins should slope slightly forward where it meet the QA plate (bucket). If it slopes forward too much the preesure up on the pin gets too great and the pin would rather slip up then hold (especially, depending on the design of the spring that holds the pin, if it can just compres the pin spring) The springs should allow  the handles to lock with the pin + or minus 1/4" in height. But if the the spring will compress enough to allow the pin to rise a full inch then it can disengage the QA plate. Which would be a incorrect design.Can you send us some pics to look at?  If you don't know how to post them send them hereken at skidsteer.ca   at = @ of course</blockquote>