Description Return Check Ball Stanadyne* Roosa Master* Diesel Injection Pumps Stanadyne Roosa Master Injection Pump Return Check Valve to replace OE Stanadyne P/N: 15830 Note: If the one you are replacing is plugging up with black partials, you may have a failing pump! This Valve fits many pump applications for John Deere, Case, International Harvester, just to name a few. There are hundreds of applications that this Part will work. Both ends of are 1/8″ pipe thread (1/8-27 NPTF) ***PLEASE COMPARE THE PUMP MODEL NUMBER PREFIXES BELOW TO YOURS*** And do the wrench test, if a 1/2″ wrench fits you old valve this is more likely to be correct. If you old is a 9/16″ you likely need our valve Check Ball 21251 But please keep in mind that the valve is designed to allow some fuel to pass. Making it a self bleeding system. If you look at the ball seat close there is a tiny cut to allow this to happen. The purpose of this item is to create a small amount of pump housing pressure while running, not to stop all fuel flow in either direction. In most cases this valve DOES fit all pumps with model numbers that start with: JDB DBG DBM DBO DCB DCM DM In most cases this valve DOES NOT fit pumps with model numbers that start with: DB2 DB4 DES DS CBC CDC Not the part you need? See if Check Ball 21251 is a better fit. Or you can always contact us for help getting the right part.
