chipwitch 73 #1 Posted October 16, 2014 I have a 1 spool 4/3 valve and am having trouble identifying the thread. I have a great pdf file from discounthydraulichose and even chatted with one of their reps for about 30 minutes to no avail. First off, it's a 5/8-18 straight female thread. Not metric. Not tapered. I am certain. There are no identifying marks on the valve. No machined face, chamfers or seats of any kind. Though, there is a 45 degree funnel at the bottom of the port... down almost a full inch; too far to be a seat. I figure it's just the narrowing before entering the spool chamber, which I can see just beyond. Anyone know of anything like this. Proprietary? I can't see how it will get a good seal without a machined seat somewhere. This valve was something I got at an auction. It was hobbled together with a hydraulic power unit and what looks like it might be a hydraulic hose crimper, oddly enough. Share this post Link to post Share on other sites
