SXR Pump cone won't fit after rebuild

[Cannibal]

Not sure WTF I did wrong here, but I put pump bearings in this pump and now the cone won't fit.

The recess from the end of the housing to the bearing is about .26" and the pump cone depth where the o-ring is is about .38" (going by memory). I grabbed a different pump cone because this was actually a 650 cone and found the same thing.

I figured the back bearing was not seated all the way, so I pulled pump shaft out and found that inner spacer sleeve tight between the front and rear pump bearings. I can't remember how I assembled this pump, but I heated it up in the oven and dropped one bearing in to the seat, inserted the spacer sleeve then inserted the other bearing. It's possible that the front bearing is seated, and the back bearing is just seated against the spacer sleeve, in which case, to solve the problem, I'd have to unseat the front bearing and seat the rear, then the impeller would end up spaced farther away from the veins. I'll play with this tonight. I suppose it's possible these bearings have a wider inner race which is preventing one bearing from being fully seated by the spacer sleeve.

This was a WSM bearing kit. I'll grab the bearing numbers when I get home, but I'm pretty sure I recall them as 6303.

Anyone run into such an issue, or any input?

 

[sxipro02]

I had the same thing happen when I installed a wsm bearing kit on my sxi. I just took a large socket and drove the bearing in with a mallet. It actually went in pretty easy and havent had any issues with it since. the wsm bearings were the same as my stock ones, just a snug fit.

 

[Cannibal]

Ya, but that inner sleeve between the bearings is tight between them, if I drive the back bearing in farther, it will drive the front bearing out...that's assuming the rear bearing isn't fully seated in the housing.

 

[Crab]

Steve, the rear bearing and the spacer in the middle locate the front bearing as I recall. I also have shortened the spacer to get the impeller further back on a 650 pump...:Eyecrazy:

 

[Cannibal]

I thought both ends were stepped, but you might be right.

I'll heat the back end and pull the bearing tonight, then measure the depth to the land and subtract the bearing and see what I get. If it's not seated, only choice is to push the front bearing and seals out a little, or take the spacer to the lathe and take a bit off.

 

[Cannibal]

I heated the back end and pulled the bearing. The depth to the step is 23mm, the bearing is 14mm and the pump cone inserts 9mm in, so that bearing obviously needs to be fully seated against the step. So, I heated the front end, and tapped on the back side until I got enough clearance.

There is a step in the front as well, but that just must be where they stop machining for the bearing outer race, not actually a bearing stop.

So, I guess these Kawi pumps need to be assembled from rear toward the front.

and now we know....and knowing is half the battle. GI Joe!