That 15068EB spring is the one that breaks and goes through the gears and often destroys gears and body so it is normally replaced when pump is apart if it has the original style lighter spring. If a pump has shims under body they are used to control end play on gears and one should remove as many as possible and still turn pump. Some later pumps used needle bearings on shaft but I always found the bushings gave better control of side play and therefore clearance between body and gears under pressure. All more modern pumps have pressure applied to the end of gears and therefore can deliver fluid under greater pressure. One has to keep in mind that a pump may very well be able to reach relief valve pressure while deadheaded but not be able to deliver sufficient gal per min to do a job due to wear on gears, body and end plates. When we got a flow rater in shop we could readily find out just how poor those old pumps actually were and wonder how they did their job as well as they did.
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Today's Featured Article - Talk of the Town: Repairin a Gas Tank - by Staff. This interesting discussion is from the Tool Talk Discussion Forum. Remember that safety is your first priority - make sure you know what you are doing before attempting a potentially dangerous activity!
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