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JB Weld

B

Brown Swiss

Well-known Member
I have never used JB Weld before, I am putting new bushings in the drive of my spreader for the apron, the shaft wore the cast out of round, is there a JB Weld that will work for this? Other wise I am going to just weld it up with the arc welder, 55 nickel, and work it down, just wondered if the JB Weld wouldn't be quicker and easier. Thanks
 
ray is right, jb weld in all its various forms is a form of plastic, that will not work in your application
 
Simple answer is NO it will not work well. Ya it would work for a while maybe hours but figure it is a sort of plastic stuff and having iron spinning in plastic well it will melt down and egg out fast. Me I would drill it out and install a brass bushing
 
I think that would be a good use for jb weld. Was building a pulling tractor engine and while boring the block the boring machine moved for one of the lower bores. We just built it up with jb weld and re-bored it and it is still running after 20 years. I would think a bearing would be similar. I'm not a big fan of it in more structural situations tho.
 
New Idea 37xx? Mine's worn in too. I replaced one side with a whole new housing,but the shaft was galled so bad that it took the new one right back out.
I use JB Weld for a lot of things,but I think that apron will be too much pull on it. I'd go with the nickel rod myself.
 
The JB weld would (maybe) work to hold a bushing in a wallowed hole, but it would not hold up as a substitute for a bushing, as in direct contact with a turning shaft.
 
Mine is a 3622, new enough it has the AGCO symbol on the front, knew the bushings where bad but bought it anyway.
 
Thanks guys, I will just use the welder like planned, just wondered! I had to go get some more AMS and get a couple hoses made and stopped at the little parts place I like going to and picked up one thing of JB Weld and a LOC tight brand one, so have it to use on something some day.
 
I knew the outside one was worn out on my 3732 when I bought it. The dealer threw that entire plate and bushing in with it. Like I said,the shaft was so rough,it took the new one out. I had to pull the shaft out a year ago to replace one of the sprockets and I found out the one on the other end,behind the drive sprocket was pretty bad too.
 
I had a loose pivot bushing on the front of my MF65 diesel used jb weld and a new bushing sold it five years later still tight.
 
Cleaning the cast thoroughly so the JB weld will stick is important. Acetone works very well and will leave no residue. MEK would work too. Carb cleaner will leave a residue as will some brake cleaners.
 
I don't think some of the replies understand what you want to do.
You have an egg shaped hole in the casting so you want to install a new bushing for the shaft. Then you want to fill in the area on one side where the shaft wore into the casting. My understanding is, the shaft will not contact the JB weld because the shaft will be in the bushing. The JB weld will only keep the bushing where it belongs in the casting.
I would think it would work since you're just using the JB weld to fill in the area around the bushing in the egg shaped hole.
I could be wrong but that's the way I read your post.
Dick
 
Ya, I have it all out right now, the shaft needs welded up on both sides and both castings! Then it needs a new web after that, not bad bad yet but I don't like it getting to that point, the slats are sure thin.
 
Dick your right on the money, I am not the best at explaining myself sometimes, just a young hillbilly! LOL
 
You are smart to fix it right.
JB is a goofball fix for people who do bad work.
If I was dictator of all the world the first law I would make is to outlaw that crap. Next I'd make people go back to useing the right bathrooms.
 
Thats funny, Next I'd make people go back to useing the right bathrooms.

And stop changing genders when they want, imagine some guy going to the Doctor telling him he wants to become a woman, so the doctor hands him a block of wood and a butcher knife! Might help him reconsider! LOL
 
There are some places JB Weld is absolutely the best solution. Filling around bushing in an egged pot metal housing would be one of them. Around a bushing in a cast iron housing just depends on the load. JB Weld lists the strength and you can figure out the load to determine whether it will work. I'm glad there is no dictator telling us how to make repairs. I could not afford to make repairs like some folks think is necessary, such as replacing perfectly good parts just because they have whatever it is open. Lot's of those folks are just trying to make everything perfect. I'm trying to get by with minimum costs, including downtime. Sometimes JB Weld makes a good repair.



























j
 
The City of Dallas fixed a Caterpillar Dozer with JB Weld and saved thousands of dollars! It used to say so right on the package.
I don't recall what exactly was fixed; probably glued the crankshaft back together.

Surely you don't suggest that the City of Dallas does bad work?
 
That type of repair is pretty well exactly what JBWeld IS good for. Just make sure you get a good solid pour around the bushing when you place it.... and don't forget to get the alignment correct. That may be tricky? I know I used JB to fix in place new wrist pin bushings on a baler plunger head and it's still going. I think this will be a snap. lol
Thing to remember is that JBWeld performs well in compression... When it's placed in a situation where tension forces are applied to it, things go haywire pretty quick. And do remember to clean the parts with acetone or ether until it no longer traces oil out in the rinse. Then it will adhere properly.

Rod
 
JB Weld is just a form of plastic. If your application is a place of high stress, it will work for a while, but will wear out more quickly than the original material. If there is little stress, it might last a good long time. However, if it is applied to a moving part, it will probably fail quickly. After all, it is still just plastic.
 
Lead pipes held together with JB Weld?

Downtown Dallas is nightmare of One-Way streets. They could use some JB Weld to glue on some different street signs and fix that mess!
 
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