water pump

Postby team v » Thu Dec 22, 2016 8:21 pm

Ha all had some issues with water pump so pulled sea/raw water of to change impeller and inner seal was buggered
so thought i would change seals and bearings at the same time but not sure how the impeller shaft stays in as there is no circlip
to hold in the housing. when removed just gave it a light tap with hammer and fell out.
am assuming its the rubber seals that hold it in place.?????????????
does any one if this is the case will try get a photo up if i can on a black scorpion serpentine belt.
thanks having trouble getting photo up will keep working on it
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Re: water pump

Postby team v » Fri Dec 23, 2016 5:51 pm

water pump
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Re: water pump

Postby Skier1 » Fri Dec 23, 2016 8:01 pm

Hi I have a 315 hp Mercruiser and my shaft has a circlip holding it in .Have a look at the below Mercury site which lists all spare parts .

https://www.mercurymarine.com/en-gb/au/
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Re: water pump

Postby team v » Fri Dec 23, 2016 9:10 pm

ha mate did see that, but my one there is no were to put a circlip and when i pulled apart there was nothing holding the impeller shaft in.
i would assume it was the seal holding it in.
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Re: water pump

Postby Renton » Fri Dec 23, 2016 11:23 pm

Which way does the shaft assembly go in? Come out the same way the impeller comes out or from behind the housing?

I would have thought the bearing would be pressed onto the shaft then just taps into the housing behind where the impeller not requiring a circlip as when the pump housing is bolted onto the motor that holds it all in place? Then if you remove the pump housing from the motor the only thing stopping the shaft assembly from dropping out is the impeller and a bit of resistance from the shaft seal.
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Re: water pump

Postby team v » Sat Dec 24, 2016 8:40 pm

this is the one i have with no circlip.
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Re: water pump

Postby 82Juddcraft » Mon Dec 26, 2016 1:12 pm

What's them 2 bushing looking things on that shaft assembly?
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Re: water pump

Postby team v » Mon Dec 26, 2016 3:45 pm

if its the number 5 they are bearings on the shaft
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Re: water pump

Postby 82Juddcraft » Mon Dec 26, 2016 8:54 pm

team v wrote:if its the number 5 they are bearings on the shaft

Yeah must do, 7 and 4 must be a pressed fit into the pump housing and the bearings stop the shaft from moving backwards or forwards.
I'd like to see what that tolerance ring looks like, sometimes they go around the bearing race to hold it in place.
Probably not the best picture, the rings that bumpy bit on the outside apposed to where it's pointing.
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Re: water pump

Postby team v » Tue Dec 27, 2016 7:01 am

Ha mate
does not look anything like that, the two seals just push in the only thing pressed on was the bearings on to the shaft
and then just slides in to the housing
will try find a picture for the tolerance ring.thanks mate
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Re: water pump

Postby 82Juddcraft » Tue Dec 27, 2016 7:49 am

That's a gimble bearing I got there. Thought the tolerance ring might be similar. Because they're a fairly tight fit.
The pump on my boats held in by a keyway that locks into the impeller.
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Re: water pump

Postby team v » Tue Dec 27, 2016 8:01 am

just found on a fourwins forum same pump theirs failed they are saying the bearings should be pressed in the housing witch holds the shaft in place
i no mine didnt fail but looks like new pump
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