Help! Allison transmission control problem!

[michaeldterry]

I'm not sure I understand. This time you weighed the tag and drives combined, and you are subtracting the weight of the drives from previous weighing? I'm not sure I would do that. I guess it's a pretty good estimate, but.

When I've weighed at these CAT scales, I've been able to split the drive and tag onto separate parts of the scale. Obviously this is prone to some degree of error as it's really hard to get this situated so that you get an accurate weight.

But, I'm glad your overall weight came down.

Ray - I don't know what to say/do. We're just doing what the Weigh Master at the CAT Scale said. He did say that, the way we weighed at the Pilot probably included the weight of the toad with the rear most (tag) axle, so assuming ( yeah, I know about "assuming"...) that the other axle weights at Pilot were essentially accurate, subtracting the drive axle weight from the Pilot ticket from the combined steer/tag weight on the QT ticket should give a good estimate of the actual tag axle weight. It made sense when Vita explained what he said! Since the steer axle weight was only 120 lbs difference between the two scale tickets, it seemed like a reasonable way to get a close estimate of the other two axles....

[Ray Davis]

Yeah, I understand. I was just concerned that the whole previous weighing was a bit busted, especially at the read end, affecting certainly the tag, but possibly the drives too?

Best would be if you could get a real weight of both your tag and drive axles, however, I would guess that gives you a pretty good approximation at the moment.

Generally, most of us tend to be overweight on the steers, so that part is critical.

[GDeen]

I also tried to weigh mine with the toad attached on CAT scales the first time. It was obvious from the weights that it didn't work and I got the toad weight on the ticket also.

Pulled around, dumped the toad, pulled back on the scales. They should be able to let you know if you aren't spotted properly for getting your drive and tag weighed separately - the scales are designed for that.

[Danss]

If each wheel is weighed separately like we did at Spearfish, is any allowance made for some of weight being duplicated?

[truk4u]

Michael,

The weigh master is a fuel clerk and he's full of ca ca! I've weighed there since they opened, side to side, front to rear, with toad, without toad and the numbers were close to other scales I used. I do this 2 or 3 times a year just to check on the crap I'm carrying. If you go back there, call me, I'm 15 miles away and I guarantee you it will work. I have tickets in the bus right now that show side to side numbers from that scale.

You may be OK now on your gross, but the steer is still overloaded.

Ray - Good catch, I didn't look at the chart, but the end result for the duals are the same? You have to mentally divide the Michelin numbers by 2.

[Ray Davis]

Ray - Good catch, I didn't look at the chart, but the end result for the duals are the same? You have to mentally divide the Michelin numbers by 2.

I didn't compare side by side, but I assume the end result numbers are very close. It was just interesting when I looked at one chart, and the numbers went up to somewhere about 18,000, while the other only went up to 9,000 pounds!

[Danss]

At Spearfish my drive axle weighed 10,100 on one side and 9300 on the other.
Add together and divide by 2 and you get 9700 and the michelin chart only goes down to 11680 at 85 lbs. Based on the chart I should have about 70 lbs in the drive tires.WHAT AM I DOING WRONG??

[Ray Davis]

I think that it's fairly common that the drives are lightly loaded. If 85# is the lowest on the scale, then that's the minimum I would run. Personally, I would probably bump it a bit to 90 or 95 pounds. I don't think you can hurt anything at those values.

In looking at my last weights, mine too is off the charts at the bottom end. I'm running 100 pounds in mine, instead of 85.

ray

[michaeldterry]

Michael,

The weigh master is a fuel clerk and he's full of ca ca! I've weighed there since they opened, side to side, front to rear, with toad, without toad and the numbers were close to other scales I used. I do this 2 or 3 times a year just to check on the crap I'm carrying. If you go back there, call me, I'm 15 miles away and I guarantee you it will work. I have tickets in the bus right now that show side to side numbers from that scale.

You may be OK now on your gross, but the steer is still overloaded.

Ray - Good catch, I didn't look at the chart, but the end result for the duals are the same? You have to mentally divide the Michelin numbers by 2.

Tom - I'll have to have you show me how to weigh one side at a time on that scale. That sign frame is almost right up against the scale platforms a little forward of the halfway point of the platforms and doesn't seem to leave any room to maneuver one side off the scale. Since you've done it before, I'm sure I'm missing something, but I sure don't see how it's done!

[garyde]

The charts show recommended minimum PSI. Also, the max is 130 lbs.
I keep my front 365's at 110 lbs, my 315 drive at 105, & 315 tags at 100.
I wouldn't feel comfortable at much less besides I wan to optimize my mileage.