Atc 250r 84 sprocket carrier binding when being pressed back on after plating

[oldoo]

So I pressed off my sprocket carrier to get my axle replated. I placed the axle in the freezer overnight and then attempted to press the carrier back on but it got stuck halfway... plating was too thick in my opinion or there was some debris on the sprocket carrier/hub causing it to bind.

So I got it pressed off and have to try again.... any tips? Maybe heat up the sprocket hub/carrier prior to pressing on this time? How much heat can it handle without stretching?
Cheers
Pics of pressing on and off...
https://uploads.tapatalk-cdn.com/20180430/8f344bfcf8dd6613b127e5ddd08fce17.jpghttps://uploads.tapatalk-cdn.com/20180430/91a60d84a2fa35a912f01411b3228341.jpghttps://uploads.tapatalk-cdn.com/20180430/2514835027fb0224941c515f9faab069.jpg


Sent from my iPhone using Tapatalk

[ironchop]

Chill the axle in the freezer overnight and heat the carrier hub in the oven or with a propane torch. Although I'd go with the oven because the torch might discolor your new plating. 300 degrees ought to do it

Have a buddy handy because once that hot hub hits that icy axle, it's gonna start shrinking the hub FAST and it can still get stuck midway down. Don't linger too long before starting. Get everything ready, then go pull the axle out of the freezer and the hub out of the oven and run (that's why I said two guys or gals needed). I've swapped a good carrier off a 200x axle before (bent axle/good carrier, bad carrier/straight axle) and they are on there VERY tight from the factory so it's a pain in the arse to swap. At least .001 interference fit by design probably closer to .0015

Edit: 300 not 200
Sent from my Z958 using Tapatalk

[jb2wheels]

I had similar issue with my 350X axle.
The sprocket hub was very hard to remove in the first place.
Once plated, was hard to install.

I heated the hub to 400 in my garage oven.
Then used a pipe and sledge to install. Ugly process.
I did not have a freezer big enough for the axle.

[ironchop]

Yeah after reading John's post ^^^ it would probably be a good idea to go much more than the 200 I typed in. I meant to type 300 to begin with but I fat-fingered my post. 300-400 degrees should do it.

Sent from my Z958 using Tapatalk

[oldoo]

Thanks guys, looks like heating up the hub is the way to go. Also any ideas on thinning down the plating if it's too thick?


Sent from my iPhone using Tapatalk

[yaegerb]

I am hoping that heating that hub to 400 doesn’t melt the rubber inserts. I didn’t have to heat anything on the last 84 250r I did even after plating. They used way to much. I would take a wire wheel to the inside of the hub splines and see if you can take a good amount off.

[oldoo]

I am hoping that heating that hub to 400 doesn’t melt the rubber inserts. I didn’t have to heat anything on the last 84 250r I did even after plating. They used way to much. I would take a wire wheel to the inside of the hub splines and see if you can take a good amount off.

Thanks mate that looks like the go. It was going on perfectly without too much force then it bonded and the press started popping, then I knew I was in trouble haha

Edit: to avoid the rubber bushes melting I might just use my propane torch to heat the centre up, but I guess the alloy will absorb that heat hmmm


Sent from my iPhone using Tapatalk

[jb2wheels]

I am hoping that heating that hub to 400 doesn’t melt the rubber inserts. I didn’t have to heat anything on the last 84 250r I did even after plating. They used way to much. I would take a wire wheel to the inside of the hub splines and see if you can take a good amount off.

That's a great point because 400F should have melted rubber. I did not think about that... I need to check what my oven is really doing.