Was wondering if anyone has attempted to take apart a sportsman 700 crankshaft. Every one i have talked to has said it cant be done. But im going to try but wanted to see if anyone has had any luck splitting one and getting a new rod on one. Any help would be grate.

 

Everyone I've ever talked to says there not rebuildable. Where you going to get a new rod? Call crankworks in AZ they can tell you all about the Polaris cranks.

 

I have 2 crankshafts and each one has one good rod. The first one i have is broke on the magneto side and the 2int one on the opposite side. If i could get them apart i could make one good one.

 

unless there a welded crank i would thing a good machine shop could take it apart. i mean they do on snowmobiles. i twisted a crank years ago that i had fixed on a polaris xlt.

 

SPORTSMAN70003 is correct.
Once you press any of the Polaris twins crankshafts apart, it's pretty much garbage.
It's a destructive process. That's why most guys who replace one, pin them for strength.
I did try doing this, after 4 different shops told me it couldn't be done.
They were right.

A sled crankshaft is a different deal. Most of them are rebuild able.
I know....This makes no sense to me either.

You can try, if you can find a shop that will do it, but it most likely won't work.
You're better off buying a new crankshaft, due to the labor
required to tear it down and rebuild it. Even if you're doing it yourself.
The other issue will be balancing the rods from different assemblies.

Hot Rods makes a replacement crankshaft for the 800, I don't know about the 700.
The other alternative is buying a new one from Polaris or buying a used one.

 

thats good info to have. thanks for sharing.

 

Yes you can rebuild the crankshaft but as u can see not every one can do it. U either have to find some that can do it I've done a lot of them my self. They were not designed to be a service able crank but you can rebuild them.

 

The trick is heat. The crank slipts in the middle. Both putter side of the crank press into the middle. Before I designed a press to pull it apart. I used a engine lift for a car chaining it to the arm of the lift them to the bottom, jack it up unroll really tight, then heat the center close to the bad rod up with a touch with map gas, it burns hotter then propane the( yellow bottle.) Once u see it start to sweat jack it up a little more then hit it with a hammer on left to right to twist the crank once u get it to move just a hair hit it down on the flat wing of the crank. To counter for the UN even pull the lift will put on it. The first time it move out will be a big pop and u will have to jack it up more put. It don't hurt to tie safty rope to it to keep falling on the floor and messing up your crank. Keep hiring it with and u jack it up on the flat side of the weight and it will slowly back out unroll it falls apart . But to make sure it goes back together right I will not hurt to drill a berry small hole in it all the way through the collor to the pun in the middle of the crank so I can see it lines up perfectly once ite pressed back together it just makes sure its right. U can also tack weld it back as well I have pics also u show u if u need

 

Sorry if its hard to read I'm using my cell to post to this ad and my fat fingers hit every key next to the one I want

 

And u can get new rods for the I've got a few off e bay Polaris does not offer just the rod. But they do offer it after market ones