Removel of tires from 41 Chev DND

[Mike K]

The chainsaw was effective , if anyone passing by noticed what I was doing The bead lock is in there, I can see it . There is no hope of removing these tyres with a conventional bead breaker .

Now what to do next . I need to cut the last inch or so of rubber to gain access to the wire . The angle grinder .

[Mike K]

This is hard work and not the sort of thing to be undertaken by the faint hearted disciples out there. I am in need of a weeks rest before I tackle the next one.

[Jacques Reed]

Hi Mike,

Nice work. I must admit I felt a bit squeamish reading about the use of a chain saw to remove tyres here on the forum but after seeing the wall thickness of your RF tyres compared to conventional 9.00 x 16" I can see the advantage over a reciprocating saw. See attached photo for comparison. I could only envision the disaster if chain accidentally meets steel rim, or if it kicks back, hence my concern.

I can only vouch for my standard military tyres but my Ryobi reciprocating saw goes through the tyre carcass like a hot knife through butter. I Used a medium pitch wood cutting blade in it. It still does the job on standard tyres and a lot safer and easier to control than an angle grinder or chain saw in my humble opinion. Just drill the four 3/8" or bigger starting holes as I mentioned in a post last year on the subject.

I used a hand chisel to cut the bead wires but to do it again I would use an air chisel. It would sure speed up the process, save the knuckles, and they are cheap to buy now.
As always, I bought an air chisel after I had removed 10 tyres. Some people learn slowly!

Cheers,

[SteveJ]

https://stevejsstuff.shutterfly.com/pictures/36

found this in a 1944 construction magazine.

[Gordon Yeo]

For shear brute force and ignorance a 50 ton press is real handy for pressing original run flats off rims.

[Grant Bowker]

The Hammond Barn had looked at the 20 ton press but it isn't wide enough to fit the wheel/tire assembly far enough in to achieve much. It might be possible to create wider fame members. Do you have a feeling whether the 50 ton the press was working hard or way below capacity in removing the tire? Is that a 20" rim being used as the load spreader or did you have to go to a larger size to clear the (assumed) CMP 16" rim.

[Gordon Yeo]

Grant

I had a rim from an M135 ( 20 inch tire size) and it has a one inch greater inside diameter than the outside diameter of the 16 inch CMP rim. The greatest pressure I saw was 15 tons and the tires were dated 1941, 1942 run flats. I assumed they had never been replaced.
When I was looking for a shop press the bang for buck seems to improve quickly with increased tons, as does the working width. I have made a set of dies and can form 32 inch wide 16 gauge steel. Maybe not as pretty a job for some instances but for an old CMP it is good enough.

Gord