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

[Bob Carriere]

Now have some pictures that illustrates the damaged induced by too much torque on stubborn CMP tires.

The "clsw" on the tool that actually assist in sitting/wedging the foot of the tool between the tire and the rim is the main part that has failed. The claw looks like the curved section from a 5/16 thick steel pipe....about 1.3 the circumference and has a small section of tubeing welded and pinned in pplace to pivot.

Earlier pictures of the tool only shows the plain curved section later model, such as ours, has had a small lenght of 1/4x1/4 steel added to the side of the claw for stiffness.....but not stiff enough as ourts bent just where the reinforcement ends.

Since the main body of th tool has not shown any trauma we plan to have a NEW claw cutout of 1 1/4 thick T1 steel plate with a thicker profile/

JUst as an aside we have used the tool with the existing twist and bent to derim a modern 900x16 tire off a modern rims and it still works fine........ but will need rebuild to work on tough cmp rims. We have kept the bad rim so we can continue the process with the beefed up tool at a later date.

Here are pictures....

[Bob Carriere]

The same pictures will be sent to the manufacturer to see what they offer as a solution.

CONCLUSION....... The tool was never used with a air impact wrench but nonetheless it has its limitation and can be overworked using a 16" hand ratchet. Once the resistance of the tire bead on the rim gets too high the holding claw which should insure that the foot inserted under the rim starts twisting this imparts the same twsiting motion to the tower of the tool..... the more it twist the more the foot slips out and the more the claw bends.
I am confident that a claw made of solid steel with a greater cross section will be more resistant to the twisting action.
Bottom line ..... on some really badly rusted rim/tire it maybe wiser to resort to the various proven "cutting methods" used by members OR spend the big bucks for the professional hydraulic models or visit your local truck centre and pay the man.

Meanwhile we are going to rebuild our model to be more resistant to our heavy handed approach and keep the worst tires for the chainsaw and chisel.

The Barn Boys