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June 2009
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Archive for June, 2009
STEERING AXLES AND STEERABLE LIFT AXLES
Posted by Ross from Salt Lake City, UT, US on June 29, 2009
Hi, i just read ’section six’ of your total vehicle alignment brochure. I would read the rest but didn’t figure out how to get it yet. But, that isn’t the problem. According to a manufacturer of one type of lift axle that we use, they recomend an alignment of 1/16″ toe in. I see what you reccommend for steering axle alignment. However, on our Mack trucks would you recommend that the weight of the truck be on the wheels or would you rather it be jacked up to obtain the specified toe in? If it matters, we are running CH613s, CL613S, CHN613S and CXN613S.
Thank you,
Ross
We recommend that axle alignment be done with the vehicle loaded.
Discontinued 11R22.5 G164 Goodyear Tire
Posted by Ed from Baltimore, MD, US on June 17, 2009
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One of my shops has been advised that the (11R/22.5 G164 GoodYear Tire) is no longer being produced by Goodyear, and that the replacement tire is the G622. Is this correct? If so, can the G164, and the G622 be mixed on the same axle, given that the tread depths are equal? When GoodYear discontinues a tire model, why do they not publish this information for their customers so that we don\’t have to scratch our heads and say what do we use now?
Yes, the G164 has been replaced by the G622. It is OK to mix them on an axle since they have the same tread depth and diameter. When we discontinue a tire, we advise our sales reps and dealer organization. It is then up to them to spread the word to our fleet customers. For customers doing business directly with our dealer organization, we have no way to notify you one-on-one. We do issue press releases that are published in major trade publications.
Heavy duty lifting equipment and tire rating
Posted by Michael from Midland, MI, US on June 3, 2009
It the capacity rating on a tire meaningful when lifting vehicles with mobile column lifts. My concern is lifting a truck with twin alxles in the rear (four tires per axle) but the lifting equipment is placed under one tire on each side, so one tire is taking the load of 4 tires when lifting the vehicle for maintenance. The lifting mechanism has two angled supports that slide into the tire while on the ground, therefore there are two pressure points when lifted.
The typical load capacity that is published for tires is at highway speeds. When the vehicle is not moving, the load that can be carryed by a tires increases. So, although you should be OK, it would be a good idea to become familiar with the static load capacity of the tires on the vehicles you are lifting. You could get in touch with the Tire and Rim Association and purchase their annual yearbook that has this info. www.us-tra.org
Minimum Tire Pressure on motorhome
Posted by Joel from Barberton, OH, US on June 3, 2009
On 36 ft. Holiday Rambler class A motorhome, the Sumitomo tires show maximum cold air pressure of 110 PSI. ( 245/75R 22.5) on the sidewalls. Checked air pressure. It’s 91.5 on fronts and 86 0n rear (duals, not tag axels). What is the correct or best pressure I should set them at?
The correct pressure depends on the load you are carrying. You need to have the motorhome weighed by axle to make this determination. Weigh the motorhome when it is loaded as it would normally be when you are traveling. Divide the axle weights by the number of tires on the respective axle. In your case, divide by 2 for the steer axle and 4 for the drive axle. Then use the published load/inflation charts for the 245/75R22.5. In your case, you should find these on the Sumitomo website or by contacting a Sumitomo dealer.