Tire installation question

[MikeO-WI]

My hired man and I went to install a replacement 18/4/38 on one of our 1855's this weekend. This is the outside left dually tire. We had the Murphy soap and everything thing went as planned except for getting the tire to seal up against the inside of the rim. Last time I checked we had about 24 inches of a space with about a 1 inch gap to the outside of the rim. We had soaped it up many times while installing and kept putting air in the tire but.... We just can't get the last part to move. Here are a couple of questions. How much air pressure is needed to set the tire. (first one we ever did)? Does it matter if it never sets? Anything else we can do? Not super critical but it would be nice to get it right.

 

[Dieseltech]

Some tire beads won't seat until 35 PSI is reached, I've then left it at 35 overnight and find them seated in the morning. With plenty of lube usually 25 PSI is enough, but not always.

 

[old]

On EVERY tire I have ever worked on it has the number you should not exceed to seat the bead right on the side wall. By the way I have done probably well over a thousand tires but then again at one time I did tires for a living. I have run into that many times and a lot of time you need ot let the air out and get that part of the tire up first and then let the other area come up

 

[super99]

Let the air out and push it off of the bead. Wiggle the tire around a bit, soap it good and try again. Sometimes they get too far on on one side and do that. I have aired them up and let the jack down and leave it for a day, usually pops out.

 

[rustred]

i am presuming this is a used tire. seams them buggars are harder to seat than a new tire. 35 psi is pretty safe but beware if its a used tire. i just did 2 used ones on my w450 and the very last bit is hard to get seated. step son works in a tires shop and he went on a call out for rear tire repair . no way he could get it to seat at 40 psi. he gave it a bit more and blew the tire apart. they just gave the customer another used tire. so be careful it can kill you and he was close .he said he just heard the tire starting to crack and jumped back.

 

[super 55]

Have you tried wrapping a tie down strap in the centre of the tire and cinching it up a bit? And tire mounting compound might seal off any leaking air. Someone mentioned taking the valve core out, setting the bead and then replacing the core and taking tire up to required pressue.

 

[MikeO-WI]

Yes a used tire that was given to us for a dually. It already was patched once so I didn't what to get carried away with the air. Never seen a tractor tire go but have seen pics of a split rim semi tractor wheel letting go. Hopefully the couple of cool nights and warm days here will take care of it. I will check on it tomorrow when I head out to the farm again. Thanks for the tips.

 

[old]

I've have more then one tire let go and not on split rims. Had a tire on a Case VAC not long ago have the wire in the bead area break and if I had not noticed it was looking odd I could well have lost an arm if not my life. Sometimes the best way to air one up is a clip on chuck and a quick connect 25 plus feet away so you can hook up the chick then hook up the hose and watch from 20 plus feet away. I've also done a lot of split rims and had a few blow also so I know how unsafe a tire can be

 

[showcrop]

I had this problem once. I had it mounted at the tire store and the tech, (who is a friend who I respect) advised me to take it home and just let it sit for awhile. He had rigid procedures to follow at the chain store where he worked at the time so he couldn't exceed the pressure limit. I got it to seat finally by reducing the pressure to around 8 lbs and driving around on it. Now since yours is an outer dual it is tougher to make this work, but if you drop the inside pressure to a little lower and drive it around it should work its way over.

 

[J.Wondergem]

There was one I mounted for a friend that didn't want to seat. I had it at maximum pressure and hammered on it. Told him to let it set a while with the bad spot up and see what happens. I talked to him a few weeks later and he said he went out there a week after we worked on them and it had popped out

 

[MikeO-WI]

Well here's the surprising update. Went out to the farm to find the dual tire completely flat with more bead pulled away from the rim. I suspect the valve stem but will not be able to look at it again until Saturday. Till then.

 

[old]

Tubeless or tube type?? If tubeless the bead not seating is why it is flat. If tube type good chance you pinched the tube in the bead area so it now has a hole in it

 

[showcrop]

(quoted from post at 20:35:54 07/13/21) Well here's the surprising update. Went out to the farm to find the dual tire completely flat with more bead pulled away from the rim. I suspect the valve stem but will not be able to look at it again until Saturday. Till then.

Having a one inch gap means you had virtually no seal so you have to expect it to go flat.

 

[Brown Swiss]

Bet the tube is pinched between the tire and rim, if tube is not pinched can take upto around 15 psi to get the last of the bead to seat!