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Hi, I'd check to make sure you are using the exact thinner that is recomended on the AGCO can label. The fact that the gun trigger does not reset (reseat?) by itself, assuming the spring is in place, is an indication that the needle packing is too tight (or the needle is slightly bent). Try loosening the packing a little. That packing is also supposed to be lubricated every once a while (lightly) with spray gun lubricant. As far as spraying poorly goes, I'd check whatever recommendations there are on the AGCO can label for thinning ratio. If there are none, then it's a trial and error proposition to get there from here. Some paints are not thinned at all, so be sure of the label information. Also verify that you are using a correct air pressure at the gun inlet. Assuming a non-HVLP gun and a typical enamel, your gun pressure should be between 40 and 60 psig at the gun with the trigger pulled and the fan adjustment wide open. Install a gage there to check. If that doesn't help, be sure the gun is, in fact, thoroughly cleaned by complete disassembly and inspection. If there is a gasket under the fluid tip, you could try replacing that. Or a complete gun rebuild if a kit is available. Otherwise, I'd look into gun replacement. Your problem is not related to any prior cold storage of the paint. All my paint is stored in an unheated shop all winter with temps occasionally getting below zero F. I've done that for many years without a problem. Rod
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