Re: ? how much fluid in my rear tires

Posted by Paul in Mich on February 08, 2005 at 10:25:45 from (66.188.26.29):

In Reply to: ? how much fluid in my rear tires posted by Darrell Wilson on February 08, 2005 at 07:17:01:

Darrell, As a follow up to Dave"s reply, water weighs approximately 8.3 lbs per gal. CaCl2 (Calcium Chloride) weighs approximately 10.8 lbs. per gal. The same amount of CaCl2 will give you 30% more weight than the same amount of water. CaCl2 will not freeze so it is safe for winter use. Additionally, contrary to popular belief, CaCl2 is less corrosive to rims than water. What you strive for with loaded tires is ballast, optimal wheel slippage, (10% to 15%) and optimum fuel consumption. Horsepower and ground speed should determine how much ballast you add, and you can tune that in by measuring how far 10 revolutions of the rear tire will travel under normal load with your plow in the ground, and in 2nd gear (4.0 mph). Then travel the same distance with no load, and measure the difference If it takes, for example 8 3/4 turns to travel the same distance with no load as it does under load, you are running at 12.5% slippage. Optimum run for 2WD tractors should fall inbetween the 10% to 15% range. Both over ballast and under ballast compromise optimum targets. It is recommended that liquid ballast not exceed 75$ of your tire"s capacity. Lot of guys find that high. We used to fill approximately 60% liquid and add or subtract cast weights to suit the job or application.

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