John Deere Sprintfire 1983. Long time project....

[acesillini06]

I would call cometic to order the correct ones. C1020S

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[SS440-80]

I would call cometic to order the correct ones. C1020S

I will do that

[SS440-80]

So now the project continue

The sled is in a garage at my work and lifted up on sled lift.



The Fuji/Polaris 440 has to come out



And out it is



With oil tank and gas tank out, it's time for some cleaning.

BEFORE


AFTER



And the decals removed. I don't know if I'm gonna get new ones or go for high polish

[SS440-80]

When having parts loose, got to clean them...


Oil tank cleaning outside and inside







It was not very dirty, but it made some difference





I really wonder how drunk the previous owner was when he cut the wires so short?
(sorry about the bad photo)


But nothing is impossible.




And the oil level sensor is like new again, working perfect.

[JDT]

Nice repair job Robert.

[SS440-80]

Thanks JDT!

Now when I have almost all parts and finally finished other projects and taking the time for the Sprintfire, I'm really all in to get it back on snow again

Yesterday I started with the motor.

Oily on the outside





Brake clean and cloth works fine



Not completely clean inside, but that's my own doing. I sprayed the crank and cylinder barrels with MoS2 oil when I got the parts home.


Clean



Last winter when I ordered some sled parts, I bought a oil seal to test if it would fit... and it fits perfect But I will have to get one more before I can put the motor back together. And the crank has to get new bearings too. SKF of course

[sledhead16]

Yup your deep into it now!

[SS440-80]

Was not too hard to change bearings on the crank.





Bearings off on both sides



Warming the new bearing a bit before pressing it on to the crank



A hydraulic press is just a big MUST



But always remember to fill the crank center before pressing, it's so easy the bend the crank otherwise



New SKF 6206 C3 mounted on the crank

[nick80lf]

Looks good but I have to ask. I noticed the bearing number on the box was 6202-2RS1. That part number looks to me to be a sealed bearing. Did you remove the seals from the new bearing?

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[SS440-80]

Looks good but I have to ask. I noticed the bearing number on the box was 6202-2RS1. That part number looks to me to be a sealed bearing. Did you remove the seals from the new bearing?

Yes, I just popped out the seals. The RS bearings is the same as the open, but they are greased. It's not much grease and it will flush away with the gas running trough the crankhouse, it will give a little extra smoke in the beginning I had those bearing lying, so that's why I used them.

[SS440-80]

Today I made a good work cleaning the gas tank, inside and outside


After reading about how the plastic in JD:s gas tanks kind of loosen up in the material, I cleaned the inside with nuts and petrol.
Some strange fluid came out the first time....



The outside of the tank is very gray of plastic oxide





Gently using a hot air gun to warm out the softner in the plastic brings back the nice black to the outside again



And after the warm up, a polish with a plastic cleaner makes the tank look new again



DONE! And a new gas cap is ordered.

[sledhead16]

The tank will help make that thing look great!

[SS440-80]

Yes, bringing back the colors in the details makes the whole differens

[skoalmint]

Looks GREAT ! I have NOS oil sending units if you need one . All that heat makes me wander if it will work . Nice job ,keep the pics coming. Brock

[SS440-80]

Thanks skoalmint
Good to know if it should fail. But I don't think the heat will take it, the oil tank plastic has a lower melting temperature then the tin soldering.


Here comes some more pics

One of the first pictures of the sled in this thread you can se the strap over the seat, it's all green of moss...



I was planning to replace the strap with a seat belt from a car, but somehow I gave the old strap a few minutes of work


And with a good result



After a spinn in the washing machine it looks like new again.