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Message: <blockquote data-quote="BigE" data-source="post: 62470" data-attributes="member: 8535"><p>Thought I'd jump on an old thread to try and get some info on piston end play. I have an old 520 I'm working on that has as TA1515 pump. The piston shoes seem relatively loose. My best guess at measuring it with a set of calipers is about .010" of play on the worst ones. The manual says no more than .003". There's a bit of an audible "click" when I wiggle the shoe in and out, and if you hold the piston horizontal, and raise the shoe up to the top, it falls back down all on its own. Sound like these are sloppy enough to need replacing? Just don't want to spend $500+ on piston/shoes if it's not absolutely necessary... Also, the valve plate on this one is just steel or cast iron, with no bronze insert. There are some wear marks in between the holes. Will it work just as well (though I imagine take longer!) to use the fine sand paper and glass approach to resurface the steel valve plate? I imagine replacing the whole section would be rather expensive, so again looking to repair if at all possible. Thanks for the help.</p></blockquote><p></p>