[DML] Re: Water pump pulley. Or, how do I get the @^#$^% thing off.
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[DML] Re: Water pump pulley. Or, how do I get the @^#$^% thing off.

This is the way I do it as well. (I use an appropriate size series of 
sockets rather than the screw Martin mentions, although if you have a 
hardened screw its probably safer.) There's really no issue 
with "destroying" the pump, if you are going to rebuild it you will 
be pressing the impeller shaft out anyway, if you are going to throw 
it away then you don't care. 

I don't support the pulley at all. It will move toward the pump about 1/4 inch and then stop when it bottoms against the pump. The shaft will continue out the back. 

Just remember when you press it on to the new one to support the 
impeller SHAFT from underneath or you'll press the shaft right out of 
that one too. Do not just support the impeller, it is cast iron and 
will crack. Here I also use a small socket. (I have some old ones that I don't much care about that I use as press fixtures.)

I have a cheap 10-ton Harbor Freight press and it works fine for 

If you don't want to mess with all this, the pre-installed-pulley 
versions from the vendors are definitely the way to go. 

Dave S

--- In dmcnews@xxxxxxxxxxxxxxx, Martin Gutkowski <martin@xxxx> wrote:
> The original pulley is steel, not aluminium. You remove it by 
taking the 
> back plate off the pump and with the aid of a longish high tensile 
> bolt threaded into the end of the pump shaft, press the shaft out 
> through the pump. You will need a hydraulic press and it'll crack 
at a 
> good couple of tons or more.

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