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Old 01-06-2014, 12:45 AM   #1
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impeller removal

I am replacing the impeller on my Ford 120 that has a Jabsco pump. the problem is that I can't get the old one out. I can get a bight on the vanes with the needle nose pliers but it won't move. Is there a puller of some kind for this or does it just take a lot of working it until it's free. The impeller is not damaged and appears to be intact which seems like a good time to replace it.
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Old 01-06-2014, 12:48 AM   #2
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Yep, they make pullers.


JABSCO Impeller Puller Tools at West Marine
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Old 01-06-2014, 01:09 AM   #3
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Figures. a hundred dollar tool to pull a twenty dollar part.
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Old 01-06-2014, 01:13 AM   #4
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Figures. a hundred dollar tool to pull a twenty dollar part.
good one
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Old 01-06-2014, 08:00 AM   #5
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Though not advised by many and some manufacturers...2 sharp ended screwdrivers can often pry them out...you just have to be careful not to damage the pump body.

You can also drive some screws into the rubber to get a better grip with vice grips and use brute force pulling...but before that try soaking the shaft with penetrating fluid and gently tapping the impeller brass with a punch to loosen it.

While they all can be hard....I haven't had one in a long time fight me too badly...but then mine are usually replaced or at least removed every 2 years.
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Old 01-06-2014, 08:37 AM   #6
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Spray the inside with Pam or another spray cooking oil.
Then have someone hold the stop button down and "bump" the engine over a couple of times while you "tug" on the impeller with a pair of pliers (I use needle nose vice grips).
The impeller should come out after a couple of bumps. They always have for me.
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Old 01-06-2014, 09:34 AM   #7
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I just did this a week ago so it's fresh in my mind.

Early on I realized that pulling with a single needle nose pliers helped to make the job harder. When you pull on just one vane, you can't help but put some directional force against the opposite side of the pump adding more friction and making it more difficult. That's when I found a cheapo needle nose vice grip tool like this:
http://www.amazon.com/Irwin-Tools-14.../dp/B00004YO5N

Now I lock one vane with that and use a regular needle nose pliers on a vane on the opposite side. That allows the impeller to be pulled more perpendicular to the housing. Adding some non-petroleum lubricant can help (I like Crisco) but I've always been able to just pull it straight out with this two-grip technique.

I'm also always finding uses for that needle nose vice grips.
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Old 01-06-2014, 10:42 AM   #8
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I discovered these pliers from Bayshore Marine in Annapolis a few years ago. They work well for me on a rearward-facing Yanmar water pump that is conveniently hidden under the alternator.

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Old 01-06-2014, 10:49 AM   #9
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I discovered these pliers from Bayshore Marine in Annapolis a few years ago. They work well for me on a rearward-facing Yanmar water pump that is conveniently hidden under the alternator.

Ahhhhh, another toy for the tool box. I'm on it!
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Old 01-06-2014, 12:45 PM   #10
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You must be careful when you pry against the pump body....they are bronze and are easily nicked or scratched. if they get too damaged the gasket or o ring may not seal.
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Old 01-06-2014, 01:17 PM   #11
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Figures. a hundred dollar tool to pull a twenty dollar part.
Or a hundred dollar tool to avoid two hundred dollars of aggravation.

And avoid damage to the impeller and the pump.
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Old 01-06-2014, 01:23 PM   #12
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You must be careful when you pry against the pump body....they are bronze and are easily nicked or scratched. if they get too damaged the gasket or o ring may not seal.
You are absolutely right about that. I did encounter an impeller that was really stuck and used a small piece of hardwood with the pliers to protect the flange.

Good call

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Old 01-06-2014, 02:53 PM   #13
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impeller

Wow, that sure looks easy. Great tool. That Yanmar must be in the shop, the only way I could get that much room is to remove the injector pump. Which is not going to happen.
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Old 01-06-2014, 03:14 PM   #14
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IMHO trying to lever a stuck impeller out of it's hole is not worth the risk you run.

This is my solution and I'm sticking to it:Trawler Forum - View Single Post - Stuck Impellers
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Old 01-06-2014, 03:28 PM   #15
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You must be careful when you pry against the pump body....they are bronze and are easily nicked or scratched. if they get too damaged the gasket or o ring may not seal.
My pump casing get removed, exposing the entire impeller and then the impeller is slid of the shaft. It different than the pictures shown so far.
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Old 01-06-2014, 04:32 PM   #16
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IMHO trying to lever a stuck impeller out of it's hole is not worth the risk you run.

This is my solution and I'm sticking to it:Trawler Forum - View Single Post - Stuck Impellers
Mike,

The puller is definitely the best way to go, but there are some engines where accessibility to the pump cover is limited, so the impeller pliers were invented . . . . mother of invention and all that.



Yanmar has since re-designed the raw water pump mounting to allow access from the front of the engine.

If you are lucky enough to have a pump as accessible as jleonard has, the impeller job is much easier, especially with a proper puller.

Larry
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Old 01-06-2014, 05:14 PM   #17
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Quote:
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I discovered these pliers from Bayshore Marine in Annapolis a few years ago. They work well for me on a rearward-facing Yanmar water pump that is conveniently hidden under the alternator.

No question a good idea. Will buy.

Marty
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Old 01-06-2014, 05:18 PM   #18
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Looks like those pliers also use leverage against the pump body...so while I like them...if all the doomsayers comments about using leverage with the tried and most of the time true, ageless use of screwdrivers...the same caution applies.

I really like them as they look like the ultimate limited space tool and I'm not afraid of figuring out how to avoid leverage damage if need be.
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Old 01-06-2014, 05:26 PM   #19
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No one has mentioned putting a little water proof grease or never-seize on the spline and/or on female part for the impeller prior to installation. It seems to work for us when we change ours on an annual basis. Removal is pretty easy. Just sayin.
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Old 01-06-2014, 05:36 PM   #20
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They look like a regular old pair of bent needle nose pliers that have been modified with a grinder a little heat to me. Ten bucks and ten minutes at a bench grinder and a vice would give the same result.

I have all sorts of modified tools like that for specific jobs.

As far as the leverage thing goes, throw a thin piece of wood or plastic behind them at the fulcrum.
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