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Case 450 dozer tc

C

Cropduster

New User
Hello to all! I'm new to this forum but have read many of these posts on the the forum and have learned lots about the machine. I just purchased this dozer from a local rancher and seems to be in good shape. I have never owned a dozer but have owned lots of other machinery and I've been nervous about owning one since I know it can be expensive really fast. Now for my question: I just cleaned the dozer since it had not been pressure washed in years and had a lot of grime pilled up everywhere. When I finally finished after many hours I noticed hydraulic fluid coming from between the engine and torque converter dripping out the bottom of what I would call the bell housing. Any thoughts on where the most common leaks come from? And how hard is it to pull the tc out? I've pretty much figured how it comes out but just would like some input. I have done lots of heavy mechanics jobs so I'm pretty knowledgeable about how to work on equipment. Thanks for anyone's thoughts. It's a 207 engine
 
The torque converter housing should be dry,make sure any oil on the outside is not coming from some external source like output shaft seal or the pump gasket,if there is a drain plug on the bottom remove it and let any oil in there drain out,if it had built up over time it may be only be a weep but if its dripping the torque will have to be removed checked for cracks and resealed,I can't remember exactly how I got the last one out but it was in the shop and over the pit,I probably took it from underneath,its a good idea to replace the fiber drive gear when the torque is out.
AJ
 
I have pulled mine on a 450B don't know if a 450 would be the same. Took it out the bottom. took a lot of wiggling and shaking so make sure it won't drop.A very tight fit had to pull some lines out of the way, almost had to sand the paint off the fit is so tight.Came out cattie corner.After everything thing was disconnected took about 4 hours. Had to pull mine 4 times I believe.Had some hair line cracks didn't see the first time.The last time I tested for leaks by putting air pressure to it about 15 psi put it under water found a leak fixed it. Had some leaks around some bolts.Wound up buying a used one.
 
(quoted from post at 20:01:59 05/03/17) I have pulled mine on a 450B don't know if a 450 would be the same. Took it out the bottom. took a lot of wiggling and shaking so make sure it won't drop.A very tight fit had to pull some lines out of the way, almost had to sand the paint off the fit is so tight.Came out cattie corner.After everything thing was disconnected took about 4 hours. Had to pull mine 4 times I believe.Had some hair line cracks didn't see the first time.The last time I tested for leaks by putting air pressure to it about 15 psi put it under water found a leak fixed it. Had some leaks around some bolts.Wound up buying a used one.
Thanks for the replies. So the cracks are they in the housing or the converter itself. I haven't seen how it works inside and have tried to see pics in the parts book but it's hard to get a good visual of how it all works. I guess until I pull it out I will be using my imagination!
Click to expand...
Click to expand...
 
(quoted from post at 05:41:22 05/01/17) Hello to all! I'm new to this forum but have read many of these posts on the the forum and have learned lots about the machine. I just purchased this dozer from a local rancher and seems to be in good shape. I have never owned a dozer but have owned lots of other machinery and I've been nervous about owning one since I know it can be expensive really fast. Now for my question: I just cleaned the dozer since it had not been pressure washed in years and had a lot of grime pilled up everywhere. When I finally finished after many hours I noticed hydraulic fluid coming from between the engine and torque converter dripping out the bottom of what I would call the bell housing. Any thoughts on where the most common leaks come from? And how hard is it to pull the tc out? I've pretty much figured how it comes out but just would like some input. I have done lots of heavy mechanics jobs so I'm pretty knowledgeable about how to work on equipment. Thanks for anyone's thoughts. It's a 207 engine
Click to expand...
Have you check your Transmission Fluid , is it Low , there is a Transmission Line that runs from your Charge Pump under your Alternator that runs under the Engine back to the Transmission Filter , you will have to remove Belly Pans to inspect , that is what I think is your problem .
 

Dozer bill I don't think it's a line since there is lots of fluid collecting in the housing where the flywheel is. It then runs over out of there onto the ground.
 

Yes they are off. The access plate is off at the bottom of the housing where you get access to the bolts that connect the flywheel and tc. That's where the fluid is accumulated.
 
I guess you will have to pull the torque converter , maybe rebuild it , a friend in Kentucky charge me $800 to rebuild mine , I pulled the torque out , it weights 146 lbs, used a strap around the torque , no lifting eye on mine , a man under the tractor , raise torque up a few inches and turn side ways to clear frame and lower to the ground , must be careful torque does not slip from strap and fall on person guiding beneath tractor , well that is the way my neighbor and I did it on my 450 , if a lifting eye was on the torque it would be easier and safer .
 

Thanks for the info! That's what I was kind of wondering is how much it weighed. I figured around 209 lbs and I was thinking of a way to secure it and let it come down. Yes I agree. A lifting eye would make it so much easier and safer. I may contact you once I get it out for some info on the guy who rebuilt yours.
 
Before I pulled my torque convertor I installed two 6" bolts on opposite sides.Think of them as pins to slide the torque converter on so you can bolt a short chain to the top 2 bolts holes. When you reinstall it you use the same bolts to slide it back on with.There are 2 threaded holes on one each side, used to push apart the TC from the motor. Better than driving a screwdriver in.
 
I thought of that also I find the space not big enough for guide pins , why I used a strap. Cramp condition and you hurt your fingers in a heart beat if not extremely careful.
 
What you are saying is put the two 6 inch bolts in the top two torque converter flywheel housing with a chain , no nuts on the bolts and push torque converter to the flywheel as the 6 inch bolts start in and tighten the two six inch bolts just enough to start the other bolts and then remove the two top 6inch bolts and install the shorter two bolts . Are you taking a chance the torque converter could slip out the two 6 inch bolts and fall . You do need help under the tractor to guide torque converter to flywheel . Sounds like a plan , but I would be very careful .
 
The 6" bolts should be at the center holes on each side of the torque converter to slide the tc back a little in order to bolt a short chain at the top of the tc. Hope this clears it up some. Wish I had took pictures of mine.
 
I pulled mine on a 450B , a 450 might be different. Pulled mine by myself, so it had to be secured. No way would I get under the dozer with a strap holding it up. It would probably slide off the strap and hurt you badly if not kill you if underneath it.
 
That is the problem bolting a chain to top of Torque Converter did you drill a hole , there is no bolt hole on top of our Converters .
 
I used the existing holes in the housing.The 450B must be made different from the 450. The housing is like a bell housing on a car .
 
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