CaCl filled tires and roll over tendency: John Deere Review  -- John Deere Tractors Discussion Forum and Review CaCl filled tires and roll over tendency: John Deere Review -- John Deere Tractors Discussion Forum

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 10-12-2004, 10:23 Post: 98176
cekramer



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 CaCl filled tires and roll over tendency

I just got a JD 4310 HST with 420 Loader and 48 backhoe with the advise of the dealer, CaCl filled rear tires. Two questions seeking advise:

1) If one tire has considerably more CaCl fill than the other can this lead to more instability (roll over wise) in one direction than the other? Should I balance the fill?

2) Are there any numbers for the angle over which this configuration is prone to roll?

Chuck






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 10-12-2004, 10:59 Post: 98179
kwschumm



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 CaCl filled tires and roll over tendency

Anything that changes the weight distribution of the tractor will change the center of gravity, including the weight and height of the driver, bucket size and content and position, rear ballast, tire size, fluid levels, and even inflation pressure. Once the CG falls outside the tractors footprint it is likely to roll. Manufacturers can't account for all of this so cannot give a number. Even if they did things can change in a hurry so you shouldn't operate at the limit. If one tire drops in a depression or climbs a hidden rock the CG will change mighty quick.

If you suspect your tires aren't filled evenly call the dealer. A proper fill is about 75% so the fluid completely covers the rim yet leaves enough air to allow for carcass flexibility and shock absorbtion.






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 10-12-2004, 11:01 Post: 98180
DRankin



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 CaCl filled tires and roll over tendency

Your instincts are correct, both tires should be filled evenly.

There are no angle numbers published. That is a factor that changes constantly with ground conditions, FEL position, etc.

If you are going to get into trouble, it will most likely be while everything is perfectly safe and suddenly you drop into an unseen hole on the down side of run over a rock on the high side.

Walk and inspect any side slopes you intend to work, use your God given common sense and you will be ok.






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 10-12-2004, 13:45 Post: 98191
Chief



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 CaCl filled tires and roll over tendency

If the SOPTM says it is too much.........it probably is. Best gauge of slope limits I've found so far.

SOPTM = Seat of Pants Tilt Meter






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 10-12-2004, 15:10 Post: 98207
lbrown59

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 CaCl filled tires and roll over tendency

What would be considered
Steep slope
medium slope
mild or slight slope?

Also how do you determine what the angle of or degree of a slope is?






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 10-12-2004, 16:09 Post: 98215
Murf

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 CaCl filled tires and roll over tendency

The Chief & Herr Rankin (;-p) have it straight.

Use common sense and the 'pucker factor' to guide you, that and a little experience and you will be fine.

In the begining, practice, or try to drill into your noodle, if the machine gets unstable on a slope you want to do two things above all else, 1) drop FEL and 3pth ASAP, or faster, and b) turn INTO the downhill direction. Avoid if at all possible locking the brakes, skidding wheels give you less in the way of stopping power and no directional stability.

There is no hard & fast rule as to what is a steep slope. It will vary with factors as minute as sunny weather or not.

Best of luck.






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 10-13-2004, 09:40 Post: 98250
DRankin



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 CaCl filled tires and roll over tendency

With all the house cleaning I have been doing lately I feel more like Frau Rankin.

If a slope is too steep to push a power mower across because it keeps curving downward or you can't comfortably push the mower up the hill, it is too steep for a tractor.

You can traverse such slopes in the right conditions, but only straight up and straight down and only in 4wd.






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 10-13-2004, 10:13 Post: 98260
cekramer



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 CaCl filled tires and roll over tendency

I see there have been alot of "experiences" with and with near roll over situations. All the words of caution have registered. The dealer "promises" to correct the over/under fill situation. So this web site has proven its value again. Thanks for the answers.


Chuck






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 10-14-2004, 10:17 Post: 98351
cekramer



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 CaCl filled tires and roll over tendency

The dealer sent a tire company to correct the over/under fill on the tires. His process was to raise the tractor, bleed all the excess fluid with the stem vertical until the fluid level was at the stem and raise the tire pressure to ~28psi. There was considerable fluid to bleed out from both tires. So I'd estimate 2-3 gals from one and 1-2 from the other.

My sense is that the dealer filled the tires with the TLB on the ground, the tires bulged and when he filled them to the stem level or above as the pressure increased the tires lost the buldge and thus we ended up with a nearly full fluid filled tire(s).

Anyone have any idea what the proper fill procedure should be?

Chuck






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 10-14-2004, 10:59 Post: 98352
kwschumm



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 CaCl filled tires and roll over tendency

This link describes proper hydroinflation procedure.






Link:   Firestone Hydroinflation 

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Discussion Boards > Active Subjects > Messages as Posted > John Deere Review Forum

Thread 98176 Filter by Poster:
Art White 1 | cekramer 4 | Chief 2 | DRankin 2 | kwschumm 2 | lbrown59 1 | Murf 1 |




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