Re: A wet vs. dry question...??

Posted by NCWayne on February 01, 2016 at 18:39:28 from (173.188.169.54):

In Reply to: A wet vs. dry question...?? posted by Snoopnc on February 01, 2016 at 18:10:41:

I really don't see that much, if any, difference on the driveline, regardless of the type, or amount of weight. In fact, the weight alone prevents wheel slippage, which is a major factor in driveline wear.

I say this from watching hundreds of cable plows that had either cast wheel weights, or foam filled tires. The ones that ran with no weight at all were prone to break axels due to the tires slipping and the resulting 'stutter' past back through the drivetrain. The ones that ran with weights, be they cast, or foam filled tires, never seemed to have that issue. Further, I saw no difference at all in the wear to the drive chains, the dog that engaged 4WD, or any other part of the drivetrain between the cast weighted tires -vs- the foam filled ones.

Moving into the larger machines, a cast weight is going to be attached to the rim, and thus will be on the center line of the axel. As such the only time I can see it having any effect on the driveline would be if you were to start spinning the tire, and it suddenly grabbed. The shock alone from the tire grabbing will definitely effect the driveline, and one can only assume that the extra centrifugal force from the cast weight will have a bit of effect also, as it acts as a flywheel. In this case the flywheel effect will be close to the center line, so I don't see it as having much effect in the grand scheme of things.

In the same scenario, using fluid filled tires, the weight within the tire will tend to stay toward the bottom, and/or the outer rim of the tire. As such, the weight is further away from the center line of the axel. Granted there will be some slippage when the tire begins to spin, but there will also be weight slung to the outside of the tire by the centrifugal force. Being further from the centerline of the axel, the weight of the fluid, in relation to an equal amount of cast weight closer in, would have more of a effect on things than the cast weight would.

In the end it's all just theory until somebody does some definitive tests and offers up proof. That said, I think the only big difference you'll see on a driveline wear is the difference between weighted, and unweighted, and that's if only one man ever runs the machine, and he does it exactly the same every time.

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