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Archive for September, 2009
Featured Question
Recycle symbol.
Posted by Mark from Greensboro, NC, US on September 30, 2009
Why don’t tires have a recycle designation (the triangle with the number inside) on them? Tires get recycled into many other products - so they are recyclable. Isn’t this required by the government?
For more than 30 years, the familiar triangular shaped "recycling" symbols have been found on many plastic, glass, metal and paper products. These recycle symbols are printed on these different products to promote recycling. The government does not require these recycle symbols to be displayed. Different industries have developed their own versions of the recycle symbol that are used to encourage consumers to collect these products for recycling. For example, the plastics industry uses the triangle symbol with different numbers inside to indicate a specific type of plastic, necessary for their specific recycling processes. The recycle symbols found on plastic bottles, cardboard, etc., alert consumers to collect these products and help direct them to collection centers.
According to the Rubber Manufacturers Association in 2007, 89.3% of the scrap tires generated in the U.S. by weight were consumed in end-use markets. Scrap tires have many different end uses. These uses include tire derived fuel for cement kilns and paper mills, various products made from ground rubber tires, and shredded tires used as light-weight backfill in civil engineering applications. These and other applications either recover the energy from oils in the tire or end up in a new, different product.
The tire industry is sensitive to the need to assist in promoting environmentally and economically sound end-of-life management, re-utilization and disposal practices for its products. To promote the development of appropriate markets for scrap tires, The Rubber Manufacturers Association provides technical and policy information regarding scrap tire management and markets, hosts national and regional scrap tire conferences for potential re-use industries, and advocates for sound programs to address scrap tire issues. You can find additional information on "end use markets" and scrap tire management at the website shown below.
http://www.rma.org/scrap_tires/
On a global basis we are working with The World Business Council for Sustainable Development (WBCSD) and numerous state and regional organizations to promote end of life tire management programs. Their website is:
http://www.wbcsd.org
Used all position tires as steers
Posted by James from Royersford, PA, US on September 27, 2009
Just curious as to your opinion of putting a used, all position tire, removed from a trailer, into a steer tire position?
A tire marketed as an all position tire is, just that, capable of being a steer, drive or trailer tire. It should be fine as a steer tire.
Side wall cuts
Posted by Ricc from Altaloma, CA, US on September 18, 2009
I would like to know how big can a side wall cut be befor it is unsafe to run on a fire truck and if there is no steel showing does it make it safe to keep in service. Thank you.
If the steel casing ply is not exposed, the tire can continue to run. It would be a good idea to inspect the tire often since the cut may deepen over time when the tire flexes.
Tire rotation on a Twin Steer / 3 Drive Axle Truck
Posted by David from Brownsville, WI, US on September 10, 2009
The company I work for rotates tires on all trucks on a regular basis. We bought a new truck with twin steer axles with 425/65R22.5 and 3 drive axles with 12R22.5. What would be the proper rotation for this truck?
Twin steer axles and three drive axles. Wow, an unusual truck to say the least. I think the important thing with tire rotation is to move tires around the vehicle on to different axles and to reverse the direction of rotations. So, in the case of the steer axle tires, I would rotate the left side tires to the right and right side tires to the left side and put them flip flop them between axles. Example, left front steer axle tire to the right side of the rear steer axle. For the drive tires it becomes a little more complicated. Again, use the idea of moving right side tires to the left side and visa versa. As for the axle placement, move the forward axle tires to the center axle, center axle tires to the rearward axle and rearward axle tires to the forward drive axle.
tire wear heavy truck
Posted by greg from ottawa, ON, CA on September 10, 2009
Hi Tim
tire size 11.00 r 22.5 aggrssive lug (4 month old)
international 5000 series tri-axle dump. neway air ride 46,000 cap.
left side front drive axle inner tire only shows a distinct wear pattern on the inside of the tire only. every 2nd lug on the inside row shows a step pattern developing & every second lug is ok.
the suspension was completey rebushed in the may.
any thoughts
thanks
greg
Diagnosing a wear condition is difficult without seeing the wear pattern and the vehicle the tires are on. But, you are the second person this week to bring up this type of wear on a drive axle. I asked a tire wear expert for some advise on this and he suggested to possible problems. One is wheel bearings. He said that if the wheel bearings are not tight on the axle where the wear condition occurs, this can be the source of the problem. Also, there seems to be an issue with excessive axle flexing that when combined with tires sensitive to this wear can cause a problem.