Removing CMP tires from rusted &*^%%* rims..

[Bob Carriere]

We sure picked a doozee to tackle with a new tool and it worked.

Similar badly rusted tires have previously resisted to hours of pounding with a sledge hammer, long chisels and pry bars....... the full weight of the bucket on my 7000 pounds Massey, bottle jacks against rear traction-pull bar of the tractor and just lifted the tractor then the tire fold back up....

We think it is worth the money at $227 CDN.......

Would not recommend to a journey man earning his living doing rims all day long.

The alternative more expensive one at +$600 US is too expensive for the hobbyist... at least the cheap skates at the barn....

Does need to be properly greased BEFORE first tiem you use it and again if you have been abusing it regularly.

We did take it apart after the first tire job...... we excell at taking things apart... and all was well.... but we did had some Molydebnum high pressure black grease..... I dripped some Moly gear box additive while the foot was removed so that it wold flow down the vertical tub up to the top flange....
...it dripped after and Grant was upset with all the black grease/oil.... hey it was just marking it's territory.

Our conclusion is it's worth the money and it works.... next we will tackle 20 in. rims with badly rusted stiff tires and almost new 11:00x20 2 1/2 ton rims as we need to save the 20" tires for the CMPs.
....and will keep you posted.

Some of our observation after removing the rim and examining the tire beads.
they had been savagely attacked with a grinder and suspect that at least all the covering rubber plus 2 or 3 plys of the rayon ( yes Rayon not cotton as we suspect the tires to be circa late 50s).

The tire bead was rust welded to the rim...... the contact area of the rayon threads were rollingover themselves before letting go....... it might explain why the tire had a blow out in the side wall just a few inches above some of the bad gouges..... it blew up while standing still inside a Winter shelter.....and yes it do go Boom

I know some of you do trim the extra rubber flashing from the beads but PLEASE do not cut into the plys of the bead.

Some last pictures in closing.

Comments and suggestions always welcome.

[hrpearce]

Well done Bob and Grant. It looks like your breaker has a longer push than mine. I spent two hours by myself removing my worst tyre. Your tool cost about half what mine cost more than ten years ago.

[Phil Waterman]

Hi Bob and Grant

Excellent job of documenting the process and proceedure, you should submit this MVPA for Army Motors makes a good how to article.

Had you used any penitrating oil prior to effort or were you trying it dry as part of the test?

The point on not using impact wrench is a good one, I've stripped wheel pullers using impact wrench.

Cheers Phil

[Grant Bowker]

We only applied a little penetrant as I was pretty well convinced that we would have had to almost drench the tire to get a useful amount between the tire and the rim. As well, if we had been trying to keep the tire for re-use I would have been reluctant to apply a mixture of oil and solvent (penetrating oil) to the rubber.
Perhaps soapy water would work to help the bead breaker slide between tire and rim and then more to see whether it would work its way between tire and rim? Some kind of lubricant would certainly have been nice to help slide the tire over the rim (probably best if applied from inside the tire - possible on CMP rims but harder on one piece rims).

[rob love]

Here is the similar tool but air powered. Much heavier but it saves all the wrenching. Because the shop I work in is smaller, I am able to get by with this as opposed to a larger machine like the Coats5000HIT.

Mike C and Mr Hupp had a demonstration of it last sdummer when they were by the museum.

The tool shown (Branick TTR) does show up as surplus from time to time. I have one at home myself which I picked up for $75 from my favorite surplus yard. It works well on the CMP rims and on most of the 20 inch rims, although the offset on the Honest John 5 ton rims does not allow this tool to clamp on.

[Hanno Spoelstra]

Great write-up Bob!

Here in Europe quite a few people have bought this pneumatically operated ex-German Army unit which reportedly works wonders on stubborn tyres as well.

tyre-shifter (1).jpg

[Bob Carriere]

Very nice set up with the flexibility to work on various size/type of rims.

No doubt faster than a manual set up.

Cheers