electric water pump part 1 more to come..
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electric water pump part 1 more to come..
hi guys.
i am using a CVR electric water pump on my streeter,i know from previous discussions that some of you guys dont like to use an electric pump on the street and i can respect that,
i am having trouble removing the impeller off the shaft to get to the seal which has started to leak
i dont want to start banging with a hammer and levering with a screwdriver just yet so any advice appriciated,
there is 2 parts to this story but i need to replace the pump seal first
thanks
steve c
i am using a CVR electric water pump on my streeter,i know from previous discussions that some of you guys dont like to use an electric pump on the street and i can respect that,
i am having trouble removing the impeller off the shaft to get to the seal which has started to leak
i dont want to start banging with a hammer and levering with a screwdriver just yet so any advice appriciated,
there is 2 parts to this story but i need to replace the pump seal first
thanks
steve c
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steve c
"Pretty don't make power"
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Re: electric water pump part 1 more to come..
I suggest;
*lightly chuck motor armature in a vice [wrap armature with a rag]
*slip a screw driver or pry bar under each side of the impeller
*carefully apply heat to impeller [a small propane torch or even a hair drier] while holding pressure against impeller.
*post results
*lightly chuck motor armature in a vice [wrap armature with a rag]
*slip a screw driver or pry bar under each side of the impeller
*carefully apply heat to impeller [a small propane torch or even a hair drier] while holding pressure against impeller.
*post results
Larry Woodfin - Team Woodfin Racing - Owner, Woodfin Automotive
Re: electric water pump part 1 more to come..
Is the nose of the impeller open so you can see the motor shaft?
Monty Frerichs
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Re: electric water pump part 1 more to come..
Larry,
Thanks for the tip,a friend of mine suggested the same thing as yourself last night
I think the aluminium impeller will warm up quickly with a small propane torch and hopefully come off easy,I don't want to damage the anodised housing obviously.
Monty,
The end of the impeller is sealed off as is cast that way,otherwise I may of been able to put in my hydraulic press and press the shaft out of the impeller.
My friend suggested putting the new impeller in a warm oven for a little while to help with ease of fitment,the seal kit includes seal,gasket and a new impeller,this pump is only 6 months old and there is a bit more to the story, I will put up extra photos I have taken after I get this seal deal done, as I have more questions than answers
Thanks guys for responding
Steve c
Thanks for the tip,a friend of mine suggested the same thing as yourself last night
I think the aluminium impeller will warm up quickly with a small propane torch and hopefully come off easy,I don't want to damage the anodised housing obviously.
Monty,
The end of the impeller is sealed off as is cast that way,otherwise I may of been able to put in my hydraulic press and press the shaft out of the impeller.
My friend suggested putting the new impeller in a warm oven for a little while to help with ease of fitment,the seal kit includes seal,gasket and a new impeller,this pump is only 6 months old and there is a bit more to the story, I will put up extra photos I have taken after I get this seal deal done, as I have more questions than answers
Thanks guys for responding
Steve c
steve c
"Pretty don't make power"
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Re: electric water pump part 1 more to come..
Might be locktited to shaft...if so....as stated a little heat will free it up
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Re: electric water pump part 1 more to come..
jonny5
crap,what is the set screw for?
only joking,yes i took the photo twice and turned out crap both times and yes set screw is removed
going to heat with a butane torch and hopefully fall off
crap,what is the set screw for?
only joking,yes i took the photo twice and turned out crap both times and yes set screw is removed
going to heat with a butane torch and hopefully fall off
steve c
"Pretty don't make power"
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Re: electric water pump part 1 more to come..
The screw is a good sign; suggests they aren't relying on a press fit for retention.
Felix, qui potuit rerum cognscere causas.
Happy is he who can discover the cause of things.
Happy is he who can discover the cause of things.
Re: electric water pump part 1 more to come..
This is a trick that's used in restoring antique electric fans.
Find a plastic pipe fitting or similar that's a loose fit over the OD of the armature and extends beyond the length of the armature shaft. Heat the impeller as described then bang the pipe/armature down onto a solid workbench or concrete floor. The weight of the armature pulls the shaft out of the impeller. This gives a uniform pull and might avoid scars from two screwdrivers.
Find a plastic pipe fitting or similar that's a loose fit over the OD of the armature and extends beyond the length of the armature shaft. Heat the impeller as described then bang the pipe/armature down onto a solid workbench or concrete floor. The weight of the armature pulls the shaft out of the impeller. This gives a uniform pull and might avoid scars from two screwdrivers.
Dave
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Re: electric water pump part 1 more to come..
hi guys,
this was a lot harder to do than i first figured,after applying some heat via butane torch the impeller did free up slightly
i ended up cutting the end off the impeller and having to press the impeller off in my hydraulic press,yes it was that tight but i did not see any loctite
on the shaft it was a very firm interference fit.
thanks to everyone for there input
i am doing a part 2 on this deal as i had some issues after using a cooling system sealing agent which i believe contributed to the waterpump failure in only 6 months of operation
steve c
this was a lot harder to do than i first figured,after applying some heat via butane torch the impeller did free up slightly
i ended up cutting the end off the impeller and having to press the impeller off in my hydraulic press,yes it was that tight but i did not see any loctite
on the shaft it was a very firm interference fit.
thanks to everyone for there input
i am doing a part 2 on this deal as i had some issues after using a cooling system sealing agent which i believe contributed to the waterpump failure in only 6 months of operation
steve c
steve c
"Pretty don't make power"
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Re: electric water pump part 1 more to come..
Nefario wrote:This is a trick that's used in restoring antique electric fans.
Find a plastic pipe fitting or similar that's a loose fit over the OD of the armature and extends beyond the length of the armature shaft. Heat the impeller as described then bang the pipe/armature down onto a solid workbench or concrete floor. The weight of the armature pulls the shaft out of the impeller. This gives a uniform pull and might avoid scars from two screwdrivers.
I like this idea, but it sounds like the OP got it done without damage.