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Case Tractors Discussion Forum
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Installing crank gear on 188 diesel crank

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BKahler

03-27-2005 15:29:46




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I only have to install the crank gear onto the crank and I'm ready to put the crank in the block. This brings me to my question.

The factory manual says to use the gear heater to heat the gear up to temperature before sliding/pressing it onto the crank. Since I don't have one of those heaters I'm wondering what the best way to install the gear would be. I have an oxy/acetyline torch that I can use to warm up the gear but I'm not sure if that is the best approach. I also have a modeling heat gun but I doubt that it will get the gear hot enough. Also, once I get the gear hot will I need to use a press or will it slide on relatively easily?

Any tips or suggestions greatly appreciated!

Thanks,

Brad

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JGarner

03-27-2005 18:43:06




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 Re: Installing crank gear on 188 diesel crank in reply to BKahler, 03-27-2005 15:29:46  
Put the crank in your freeeze over night. The next day put the crank gear in your kitchen oven and "bake" it at the highest temp it will go, 500 degrees F I think. Bake for about 2 hours. (500 degrees is well below the annealing temp for steel) If you try to heat with Oxy/Acet rig you could get the gear above the annealing temp and mess with the heat treat on the gear and either soften it or make very brittle around the shaft bore.

Take the crank out of the freezer, spray on a little WD 40 and immediatly slide the crank gear on. The gear should slide on the shaft. If it requires a little caxing, tap it on with a dead blow hammer.

Sorry about post length.

JGarner

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Farm-al

03-27-2005 18:37:46




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 Re: Installing crank gear on 188 diesel crank in reply to BKahler, 03-27-2005 15:29:46  
BK, I used an old hot plate and a pan of oil heating the gear in oil,but be carefull and don't get the oil too hot it can catch on fire, never use a torch on gears or bearings it can damage them,Al



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Bob

03-28-2005 23:04:13




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 Re: Installing crank gear on 188 diesel crank in reply to Farm-al, 03-27-2005 18:37:46  
I use a large, old deep fat fryer, with cheap generic canola oil. Smells good too!



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Klyde

03-29-2005 10:32:40




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 Re: Installing crank gear on 188 diesel crank in reply to Bob, 03-28-2005 23:04:13  
Yup me too cept the fryers got SAE30 in it. I think the 500 degrees for 2hrs and an ice cold crank is a little much. In less your gonna throw it on from across the room.



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JGarner

03-29-2005 10:51:40




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 Re: Installing crank gear on 188 diesel crank in reply to Klyde, 03-29-2005 10:32:40  
Well gents, it may be overkill, but I know it will work. At least I won't start a flash fire and explosion with hot volatile peroleum based oil in a device not designed to heat petroluem based lubricants. OSHA would have a field day at your house. At least Canola oil, while it will burn is not as explosive as hot 30wt.

The man was looking for a way to do this without purchasing any special tools. I gave him a method that uses tools that we all have in our house. I don't have a deep fryer that will hold the crank gear, my oven will. Heat is heat!! Don't belittle someone for passing along valuable information unless you have tried the method and know it not to work.

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