Impeller Puller

You can usually pry them out with a stiff screw driver. If not we sell them . You may contact me at Pflieger Marine Services 419-625-0605.
Brad
 
I used 2 screw drivers, one on each side. They pulled right out.
 
I am not to familier with the 17000 series of Sherwood water pumps which I believe is what you have but I think they now have a threaded end on them to put a big bolt in and you can use that to take them out. Basically, as the bolt goes in it hits the shaft and pulls out the impeller. I never had much luck with the bolt on the 18000 series as the impellers are longer and the bolt only pulls the impeller out about an inch and a half which didn't do much good so I got a real impeller puller to use.

As far as the screwdriver thing.... If your water pump has a plastic cam liner like the 18000 series, you will bust it all up using a screwdriver getting the impeller out. There is a groove around the edge of this plastic cam liner that the gasket sits in and it is very fragile... I think the screwdriver thing is a bad bad idea unless there is no way it can damage the model of water pump you are using. I don't know if the 17000 series has a plastic cam liner or not.

Another possibility is to just turn the seacocks off and fire up the engine and spool it up to about 2000 RPM's for about 5 minutes. That will melt all the fins right off the impeller and it'll just slide right on out after that. Of course you'll have to clean out the aftercooler and other heat exchangers afterward... Along with rebuilding the water pump.... On second thought... get an impeller puller.
 
On second thought... get an impeller puller.
Having learned from your experiences, that's the plan!
1600280652_779869e13d_o.jpg
 
Yeah... that's the bolt thing I was talking about. They used to include one with the 18000 impellers so I have about a dozen of them laying around. The last time I bought impellers though, they did not include the bolt thing-a-ma-bob. The 17000 impellers are not as long as the 18000 so it should work fine. HOWEVER... I think Sherwood just recently went to the threaded end on the 17000 series and your older impellers that are in your engines may not have the threaded end on them.
 
Or if you're really worried about it, sell your boat!
 
This is my reply to people being a little too conservative in their approach to boat maintenance. This isn't directed at anyone in particular, or due to this thread alone. The impeller is no big deal. Take it out, don't break anything. Move on.
 
I hear ya Hampton... I just don't think using screwdrivers to pull a 2 1/2"+ thick impeller is a good idea, particularly when an impeller puller is $10. And I was having trouble tracking down the specific one I was looking for... so I asked where to get it. No big deal.
 
I was just saying that removing these large impellers on diesel engines is not a screwdriver job... and that's not being conservative. When a water pump costs over $1000 and minor rebuild kit costs $400 (with the plastic cam), you need to be careful not to bust it up. How do I know? I used a screwdriver on mine the first time I changed them to try and get them out. These impellers can be hard to get in and out compared to a smaller engine.
 
I second that. I can't seem to post pictures here, but suffice it to say that my cam liners broke into about 836 pieces this year. They were $200 each.
 
Brad - most of the mid-size diesels (600-800HP) run Sherwood G18XX pumps. The cam liners are made in 2 pieces of very brittle plastic and then there is the impeller itself. Where we are buying 17000 impellers for $35-$50 ea, the 18000 series are $125 - $300 depending on where you buy.
 

Forum statistics

Threads
112,950
Messages
1,422,861
Members
60,932
Latest member
juliediane
Back
Top