440 sprocket

mapaduke@yahoo.com · Post by **mapaduke@yahoo.com** » Tue Feb 24, 2015 3:00 pm

Any thoughts on how to straighten a bent sprocket?
Of course I have 2 others buried under the snow some were ?

gregjo1948 · Post by **gregjo1948** » Wed Feb 25, 2015 5:00 am

Rose bud on your torch and a sledge hammer! gregjo1948

mapaduke@yahoo.com · Post by **mapaduke@yahoo.com** » Wed Feb 25, 2015 6:08 am

That's what i was thinking, just a lot of metal to keep hot. I will look into a rose bud tip.
Thanks.

whiteclipse16 · Post by **whiteclipse16** » Wed Feb 25, 2015 7:48 am

The better question is how did you bend it?

caribcanuck · Post by **caribcanuck** » Wed Feb 25, 2015 7:57 am

Hmmmm my dad bent one yrs ago, plowing snow on a side slope. long sideways slide into a stump that stopped him quick.

mapaduke@yahoo.com · Post by **mapaduke@yahoo.com** » Wed Feb 25, 2015 8:56 am

I don't know how it got bent, I picked up 2 440 icd 's to build one out of the 2 and put the parts that Im using under cover, now that im ready to put the tracks back on I find the bent sprocket. I have 2 others but after 3 months I will be damed if I can remember were I put them under all this snow. Lol

gregjo1948 · Post by **gregjo1948** » Wed Feb 25, 2015 9:47 am

A cutting tip will never heat enough. You'll need to anchor the sprocket in a vice or possibly, mount it on the dozer. Depending which way it's bent, you may want to mount it inside out to get a better swing. You can maybe use a comealong or winch to pull the bend out. Good luck and let us know how you make out. gregjo1948

shinnery · Post by **shinnery** » Thu Feb 26, 2015 12:48 am

I guess my question would be "What is Snow?" You lost sprockets under some? But I did see something called "Rain" several years ago, I think I remember what it looked like.
Bryce

Post by **Lavoy** » Thu Feb 26, 2015 9:19 am

I know this is going to sound stupid, but are you sure it is bent? I have never in my life seen a bent sprocket, and just can't imagine it is even possible given the mass and design we are talking about.
Lavoy

mapaduke@yahoo.com · Post by **mapaduke@yahoo.com** » Thu Feb 26, 2015 6:53 pm

I am surprised to,Its defiantly bent , I took it a machine shop today and watched them put it in a lathe and its got a 3/4" wobble in a distance of six teeth and while it was spinning I noticed the teeth are thinner than the other's in that spot like they must have been rubbing on the chain rails. We then pot it in a 50 ton press and applied 12 ton to the bend it did straighten but wouldn't stay.
I did spend some time digging through the snow with the mimi excavator, I did find three pair of 420 sprockets, guess I will dig some more tomorrow.

Post by **Lavoy** » Thu Feb 26, 2015 7:22 pm

WOW, I am just stunned, I would believe you could hang the crawler from a tree by a sprocket and not bend it. I was looking at a pair of sprockets as I walked out of the shop tonight and thinking what it would take to actually bend one!
Lavoy

gregjo1948 · Post by **gregjo1948** » Thu Feb 26, 2015 8:34 pm

When mounted on the dozer, is the sprocket bent in or out? gregjo1948

jtrichard · Post by **jtrichard** » Thu Feb 26, 2015 9:31 pm

you have to bend it PAST straight some and then when released it will stop at straight ... may have to press it a few times to figure out just how far past you need to push it

mapaduke@yahoo.com · Post by **mapaduke@yahoo.com** » Fri Feb 27, 2015 6:23 am

The shop owner didn't want to put more pressure on it for safety reasons.
Its bent outwards when mounted on the axle.
When we spun it you could see the bend all the way back to the hub.
This sprocket came off a tractor I got for parts and the owner clearly had a lack for mechanical ability. He loaded it on my trailer with a 580 case. The only thing I can think of is that he lives on a hill side and probably got it stuck and used the back hoe to get it out ?

Paul Buhler · Post by **Paul Buhler** » Fri Feb 27, 2015 5:57 pm

Sounds like a head scratcher. Old sprockets make good bases for summer umbrella stands. Remember summer? Usually warm?

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