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Message: <blockquote data-quote="skidsteer.ca" data-source="post: 19778" data-attributes="member: 307">I wonder if he replaced it with the same volume of pump? Hopefully.Pumps are rated in cubic inches per revolution. and a small misculculation here can result in a significant flow drop also.You need a flow meter to confirm your gpm (gallons per minute) output, especially if you want to check it at higher pressure. These are not cheap, would be best to have a hydraulic shop check it if you must go that far. Our local shop here could do this in 20 minutes. Not to big of a deal.First I'd check your pressure as low hyd pressure (psi) can  cause slow lift speeds to. All you need to do this is a $20  pressure guage from <a href="http://www.surpluscenter.com" target="_blank">www.surpluscenter.com</a> or simular place and a hose . couple fitting maybe $50 total or see if you friendly local mechanic could help out with a 2500 psi or so guage If it lifts ok empty but is slow under load, I'm still thinging low pressure.Ken</blockquote>