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Message: <blockquote data-quote="barnyard" data-source="post: 3479577" data-attributes="member: 13921">We had a guy that worked nights that knew enough to get a guy going safely to make it to the hub. Both of the times, the dolly that would not lock happened at my center. Mechanic came out, sprayed down the jaws and helped me build my set and pretrip to make sure that things were good to go. We also had a tractor that had a 5th wheel plate that was needing either a rebuild or replacement. Carried a bottle of the spray in the tractor and sprayed it every night during the pretrip. The jaws would not unlock properly without lots of lube.</blockquote>