I am a newbie to the site and have a JD 310A for home use. Yesterday the hydraulic cylinder for the crowd started moving much slower than normal in one direction only. It would come almost to a stop, then when you let up on the control lever and reapply if would go for a little bit and slow once more. It works at normal speed in the opposite direction and all other hydraulic functions are normal for the other hoe and loader cylinders. No leaks on the machine, filters are new this spring and oil is correct. I am guessing the problem is in the control valve, but not sure how big a problem it is to rebuild. Thanks for your help. Ron
JD310A hydraulics
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