Jet Pump Rebuild - 99 GTX RFI

[Captain RonJon]

Ok so I pulled the pump as I was instructed in previous posts (thx to all) and in fact found the pump seized. Here's what I found under the nose cone and in it. Not sure what it is lol.







I'm guessing I buy a new nose cone? I did get a rebuild kit from OSD but it didn't include anything nose cone related.

So what was the failure? Looks like the shaft is bent inward where it should look like my GSX here:

 

[mikidymac]

Wow, that is bad. You are going to have to get all the old bearings and shaft out to see if the housing is even salvageable.

You will need a new cone, pusher and spring. You will see the parts on the online diagram from wherever you buy it.

 

[Captain RonJon]

I was just starting to wonder if I will even be able to get it out. I cleaned up the shaft a bit and you can see how it's almost like it was sucked down and in. Must have gotten really really heated to do that I guess.

 

[Captain RonJon]

Wow, so I have tried everything I can think of to get the impeller off, so I can get the rest of this apart. I have used tons of heat, soaked it overnight with some blaster, etc. I created a huge lever off of the impeller removal tool and this thing won't budge. Am I humped on this one? Do I chuck it and get a new housing? Hate to spend that money if it can be salvaged, just not sure what else to do.

 

[mikidymac]

At this point you have nothing to lose. Get a longer bar and have at it.
I would pm Minnetonka and see if he has an entire pump for you. He can even install a new wear ring in it for you.

 

[racerxxx]

I'm 99% sure that is a large hub pump so you need a specific 140 pump. You just can't also any old pump on there. It had to be from another rfi or a 99 jet boat. I remember [MENTION=33508]ocod[/MENTION] had an extra pump but I can't remember if it was a large hub. But pics can answer that. I know I bought a large hub from him.

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[ocod]

I'm 99% sure that is a large hub pump so you need a specific 140 pump. You just can't also any old pump on there. It had to be from another rfi or a 99 jet boat. I remember @ocod had an extra pump but I can't remember if it was a large hub. But pics can answer that. I know I bought a large hub from him.

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Yip, and I do have other pump housing sitting on self.
It came off 99 sportster 1800

 

[racerxxx]

Oscar post a pic when you get a chance.

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[ocod]

Oscar post a pic when you get a chance.

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Here one from a while back.
Looks like the one pictured on the right.

OCOD's pump is a large hub pump. You would need a large hub impeller to run it. They call them the poor man's skat pump. Supposedly its a good upgrade, but it's not a bronze stator for strength. You also need the rear cone for the large hub, they are different too. The small hub bolts on from outside-ish the cone, the large hub the cone screws are "inside" the cone diameter cause it's larger diameter. They put them in her boats starting in 99 I think as well as the 787 rfi skis. They're on my speedster and have been flawless from day one. Honestly I think I still have the original wear rings from the factory in there still.

As far as red loctite, blue should be fine. Just torque it properly. Fill plug, I just wrap with teflon tape (plumbers tape). If that is a thin lip around the outside of the pusher and the center is "lower" that the outside, yes it's worn.

Large hub

Small hub

You can see the difference in the hub size

Large hub impeller on the left

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[1983]

Ive got a complete 98' XPL pump if interested. Good condition, never in salt.

Not sure if compatible with GTX.

Rob

 

[Captain RonJon]

Here one from a while back.
Looks like the one pictured on the right.

Thanks guys - I didn't even realize there was a difference small hub v large hub - gonna give this one more go and see if I can't free it up. Even still no guarantee the housing will still be good. I'll post up when I throw in the towel, then I'll be shooting out some pm's

 

[Strizzo]

did you get the impeller off? if so you might be able to just push the bearings out the back still seized on the shaft.

 

[Captain RonJon]

did you get the impeller off? if so you might be able to just push the bearings out the back still seized on the shaft.

No I can't even get that off, that's where I'm stuck - interesting though, I was just now able to free the shaft itself - meaning, that I have the pump clamped into a vice, where the vice is clamped onto either side of the flat sides of the shaft. So with that clamped in, I am now able to rotate the pump housing all the way around. However, the impeller is still frozen onto the shaft. I got myself a 24" 1/2 drive breaker bar and a friend is bringing me a 36" piece of black pipe to slip over the bar; try and create a super lever, lol...I guess.

Question - before I try and use brute force, I was going to try and heat it up again but I was wondering if I should heat the shaft or the impeller?? I think the impeller so it expands off of the shaft right?

 

[mikidymac]

Yes, heat the Impeller not the shaft. Also keep on the PB Plaster and heat till it boils. The heat might help pull it into the threads. Be careful with the heat as you do have a plastic pump!
A floor jack handle also makes a good cheater bar.

 

[racerxxx]

Here was a pump I wanted the wear ring from. The shaft was concaved like yours.

Here's how it ended up

The end of the shaft

 

[racerxxx]

Sent you a PM RonJon

 

[Captain RonJon]

UPDATE: well, I threw in the towel, no surprise there I guess. Just could not get the impeller to budge no matter what I did. I was able to source a complete pump locally for a great price. Thanks to everyone who helped me out on this issue. As for my busted one, a friend of a friend said he could machine it off (as a favor) when his shop slows down, so I might just do that. Maybe I could salvage it as a spare or get something for it. Anyway, will post up as this 99 GTX project moves along. And thanks [MENTION=57920]racerxxx[/MENTION] for the extra tips! So much great info in here with so many willing to help!

 

[Captain RonJon]

Hey guys - so I got my new/used pump. It is in crazy clean condition, shop said only 30 hours on it and it looks it. I was told due to the low hours it was never serviced. I didn't do anything to it but I did pull the drain plug and check the oil level, which is right at the bottom of the hole as it should be. It looks like oil should with no indication of water infiltration, so that's good. And then I pressure tested it at 10 psi for 10 mins as per the manual and it held it fine, no problem. Given this, should I go ahead and service it or just leave it as is and mount it up?

 

[1983]

If wear ring tolerance is kosher I say go ahead and install.


Rob

 

[Captain RonJon]

If wear ring tolerance is kosher I say go ahead and install.

yep, it is right in spec, all good.

 

[1983]

As [MENTION=57920]racerxxx[/MENTION] would say "do it!"




Rob