SoCal Jet Boats
Tech Talk => Jet Pumps => Topic started by: eliminator18 on April 14, 2016, 06:09:05 PM
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The old wear ring I pulled out has no lip at the bottom of it, but the new wear ring has a lip at the bottom and is a little taller then the old one! My question is can I machine the lip off the new wear ring to match the size of the last one??or do I need a totally different wear ring?? Thanks guys
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Shouldered ring.
You will need to shim the impeller back to the desired clearance.
Whatcha got cooking? What impeller?
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Alum "a" impeller with this style wear ring, just wondering if I could use the wear ring as is or if I need to machine the lip off to match my old one?
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Alum "a" impeller with this style wear ring, just wondering if I could use the wear ring as is or if I need to machine the lip off to match my old one?
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No machining, just shim the front of the impeller. Why are you replacing the ring?
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Ok cool thank you, I'm replacing the ring because it got beat up when the impeller blew apart
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A shouldered wear ring protects the suction housing in the event of a bearing failure. When a thrust bearing fails, typically it will force the impeller forward and start chewing up anything in it's way. In the old days before shouldered wear rings, it would eat up the suction housing and it would be ruined. The "shoulder" on the newer wear rings takes that hit now if and when a bearing fails and saves your housing. As GT said, shimming the impeller back is needed in 95% of these installs. Impeller shims normally come in a variety pack of thicknesses so you can achieve proper wear ring shoulder to the leading edge of the impeller clearance.
Shouldered wear rings are perfectly fine in lake boats and even in river racer applications. Full blow drag boat guys don't usually run shouldered wear rings because they like to get that clearance from the housing to the impeller super tight for maximum efficiency. They really are not concerned with wear since they are going very short distances at a time and are constantly having the pump apart making improvements.
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Thanks guys for the great info, I just installed the new shouldered wear ring, but it does not sit flush with suction housing! The rubber insert is not allowing the wear ring to seat to the bottom of suction housing, I measured the gap and its .080 is this normal??
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Yes that is normal. This is why the full blown drag guys don't like to run them. In your river/lake boat, it's not going to affect anything. Just make sure the w/r is square in the bore and not pressed in crooked.
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Cool thank you
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