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U-joint replacement

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chaney creek

05-22-2003 17:38:20




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I don't have a problem getting the bearing caps out of the old u-joints- but I seem to wind up with new needle bearings all over the floor and spend way too much time replacing the u-joint. What is the best way to put in the new bearing caps?




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Chester

05-23-2003 10:17:25




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 Re: U-joint replacement in reply to chaney creek, 05-22-2003 17:38:20  
Make up tools to push the caps in/out. Two short pieces of angle ( 2" X 1/4" or so ) then weld on a round bar slightly smaller dia. than the bearing cap and a pipe slightly larger than the cap on the other, both about 1 1/2" long. Put these in your vise jaws ( with the help of a magnet or bungee cord to hold them in place ). They will both remove and install the caps without having three hands and the use of your knee to close the vise. Before you remove the joint, check to see that the cap is not turning in the yoke. Likewise, be careful how strenuously you clean them. Would not use sandpaper or a file as many I have seen are already borderline when it comes to an interference fit.

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John

05-23-2003 09:50:12




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 Re: U-joint replacement in reply to chaney creek, 05-22-2003 17:38:20  
yes on using the vise to replace them. Then hit the unit with a hammer a few times to get things to move to the correct place.



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Vern-MI

05-23-2003 06:51:22




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 Re: U-joint replacement in reply to chaney creek, 05-22-2003 17:38:20  
Not a bad idea to dissassemble and clean the new U-joints right out of the box. I have found a lot of grinding dust in some of the Moog parts I have purchased.



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Ben E.

05-23-2003 06:03:45




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 Re: U-joint replacement in reply to chaney creek, 05-22-2003 17:38:20  
Also if you clean dirt,rust, and burrs out of the bearing cup pockets, makes reassembly much easier. A brake cylinder hone works great on them but if you don't have one, sand paper or a round file will do a good job too.

Have fun Ben E.



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Harold Hubbard

05-23-2003 04:07:00




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 Re: U-joint replacement in reply to chaney creek, 05-22-2003 17:38:20  
I agree with the other answers. I use a hammer to get them out, and a vise to replace them. Most PTO joins aren't too bad, but on some automotive joints it is easier to just burn the cross out with a torch, and drive the caps out afterward. Watch out for splattering hot grease, and have plenty of ventilation. In my experience, a vise works better for assembly than a press, because it's easier to see what you are doing. One thing that helps a lot if you are working with a longer driveshaft, is to cut a v-notch in a block of wood just long enough to support the rest of the shaft on the bench while you work with it.

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Travis

05-22-2003 21:45:20




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 Re: U-joint replacement in reply to chaney creek, 05-22-2003 17:38:20  
I use a shot and a half of gun grease in the all four caps and then work it in gently to the needles with my pinky finger. Works pretty good for me(I learned the hard way also) and then use the vise to slowly and gently put it together. I hate using the big C-clamp from OTC, usually makes the job harder in the long run, especially if you use it to remove the u-joints that are "glued" in, such as on a GM.

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kjm

05-22-2003 20:30:21




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 Re: U-joint replacement in reply to chaney creek, 05-22-2003 17:38:20  
Press the one new cap and cross about an inch deeper than normal, then install the other cap so the two caps will catch the cross at the same time then press it togather install the snap rings.



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kyhayman

05-22-2003 19:13:07




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 Re: U-joint replacement in reply to chaney creek, 05-22-2003 17:38:20  
You mean you aren't supposed to drop the needle bearings a couple of times :-)?



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Gary in IL

05-22-2003 18:53:45




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 Re: U-joint replacement in reply to chaney creek, 05-22-2003 17:38:20  
check with your local auto machine shop and find out who makes that big C-clamp looking thing that they use

I think it's OTC, but perhaps not

It's not cheap (over 100 bucks) but if you do a lot of joints, it pays for itself in time / aggravation pretty fast



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wdTom

05-22-2003 18:08:14




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 Re: U-joint replacement in reply to chaney creek, 05-22-2003 17:38:20  
I also put grease in them to hold the bearings in. Press them with my vise, don't have a press. Use two sockets, one larger than the bearing, and one just smaller, to press them out. Use vise to press them in. Has always worked for me. Way better than hammer. When taking apart a LITTLE heat on the yoke to slightly expand it may help if they are tight or rusted in.



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Tractor Dan

05-22-2003 17:57:50




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 Re: U-joint replacement in reply to chaney creek, 05-22-2003 17:38:20  
i put a little grease in them to hold needel bearings and instead of wacking with hammer i sqeeze them in with a vise of course i am pollish but it works



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Brian G. NY

05-23-2003 07:33:26




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 Re: Re: U-joint replacement in reply to Tractor Dan, 05-22-2003 17:57:50  
I've never had too much problem with the needle bearings falling out but one time one of them tipped over and wound up in the end of the cap; took me a little while to figure why I couldn't squeeze it enuf to get the snap ring back in. I, too like using a big vise with two different size sockets. Sometimes a rap on the vise with a big hammer will get a tuff one started.



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vince

05-24-2003 09:51:40




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 Re: Re: Re: U-joint replacement in reply to Brian G. NY, 05-23-2003 07:33:26  
I am lazy and hate to have to redo a ujoint after dirt gets into the cups when the needels hit the floor or when one gets lost.

If your lazy to; throw the new cross in the freezer for the night. (I know you had that new cross ordered as soon as the joint got sloppy right? but were going to run it since it might last.) The cold joint will will go into the cleaned up and debured yoke real easy with a big C-clamp, vice or $30 harbor frieght u-joint press and if you do it with a hammer the greese IS SO HARD AND WILL GET A COAT OF frost INSIDE THE CUP that those needles will not come out even if you drop it! (blasted cap lock) no need for exta grease. Just let it warm up and hit the yoke to releive the corners to releive any binding when your all done.

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