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800 Ford with pie weights tire pressure

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riveroadrat
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PostPosted: Tue Dec 05, 2017 7:28 pm    Post subject: 800 Ford with pie weights tire pressure Reply to specific post Reply with quote

I have a 800 Ford loader with The smaller set of pie weights and 16.9x24 tires loaded with water to the stem at top of wheel. I am going to install the factory rear weight box full of concrete on the factory backhoe mounts. Does anyone know what tire pressure I need for that amount of weight? I have no idea what the weight box weighs. Tires are 8 ply rated. Is it better to have them stand up some as opposed to looking like they are sqautting. Could I have too much water in them for the load?
 
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Jimmyjack
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PostPosted: Tue Dec 05, 2017 7:32 pm    Post subject: Re: 800 Ford with pie weights tire pressure Reply to specific post Reply with quote

I would think 12 to 14 pounds would be enough?
 
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JMOR
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PostPosted: Tue Dec 05, 2017 7:52 pm    Post subject: Re: 800 Ford with pie weights tire pressure Reply to specific post Reply with quote

I have never seen a tire pressure connected to "squat".
 
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Dean
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PostPosted: Tue Dec 05, 2017 8:10 pm    Post subject: Re: 800 Ford with pie weights tire pressure Reply to specific post Reply with quote

14-16 PSIG sounds about right considering all of the added weight.

Dean
 
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Fordfarmer
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PostPosted: Wed Dec 06, 2017 4:15 am    Post subject: Re: 800 Ford with pie weights tire pressure Reply to specific post Reply with quote

Tire shop manager told me that a rule of thumb for bias rear tractor tires was take the first two digits of the tire size(16, in this case) and add two. 18 psi in 16.9 bias tires will work well in most situations.
 
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riveroadrat
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PostPosted: Wed Dec 06, 2017 5:32 am    Post subject: Re: 800 Ford with pie weights tire pressure Reply to specific post Reply with quote

JMOR wrote:
(quoted from post at 04:52:53 12/06/17) I have never seen a tire pressure connected to "squat".
After reading my post that looks kind of like the difference between a man and a woman. ------- Is it better to have them stand up some as opposed to looking like they are sqautting. Could I have too much water in them for the load?
 
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Fordfarmer
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PostPosted: Wed Dec 06, 2017 6:07 am    Post subject: Re: 800 Ford with pie weights tire pressure Reply to specific post Reply with quote

I've never heard of there being too much fluid (water)
for a given load. You're still putting air in it to get to
whatever psi you decide to run, just that the air is a
smaller volume.
My 4600 ( my loader tractor) has 16.9x30's with
fluid. When I'm moving round bales, there's normally
one on the 3-point forks as well as the loader. I run
18 psi in them.
You want the full face of the tread to touch the
ground to get traction, but bias tires don't last if the
sidewalls have to flex all the time.
 
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Fordfarmer
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PostPosted: Wed Dec 06, 2017 11:14 am    Post subject: Re: 800 Ford with pie weights tire pressure Reply to specific post Reply with quote

I looked in my 26/36/41/4600 owner's manual. It
doesn't say anything about different pressure for dry
vs. loaded tires, only more pressure for more weight
capacity. It listed 12psi as the minimum pressure
for 16.9x24's, and 22psi as the maximum. I don't
remember the exact numbers, but 12 psi was good
for about 3000 pounds, and 18 psi gave about 4200
pounds of capacity. (Including liquid balast)
 
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riveroadrat
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PostPosted: Wed Dec 06, 2017 11:31 am    Post subject: Re: 800 Ford with pie weights tire pressure Reply to specific post Reply with quote

Thanks for the replies, I'll see how they look after I put that box on the back.
 
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Shetland Sheepdog
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PostPosted: Wed Dec 06, 2017 4:31 pm    Post subject: Re: 800 Ford with pie weights tire pressure Reply to specific post Reply with quote

Fordfarmer nailed it!
Forget the tire gauge!
Park tractor on smooth hard flat surface, and inflate or deflate until outer end of bottom lug just touches surface.
 
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showcrop
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PostPosted: Wed Dec 06, 2017 7:10 pm    Post subject: Re: 800 Ford with pie weights tire pressure Reply to specific post Reply with quote

JMOR wrote:
(quoted from post at 20:52:53 12/05/17) I have never seen a tire pressure connected to "squat".


I have ALWAYS seen tire pressure connected to squat. It takes "squat" to being the outer end of the lug down onto the ground as Shetland Sheepdog says you want.
 
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JMOR
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PostPosted: Wed Dec 06, 2017 7:24 pm    Post subject: Re: 800 Ford with pie weights tire pressure Reply to specific post Reply with quote

showcrop wrote:
(quoted from post at 23:10:56 12/06/17)
JMOR wrote:
(quoted from post at 20:52:53 12/05/17) I have never seen a tire pressure connected to "squat".


I have ALWAYS seen tire pressure connected to squat. It takes "squat" to being the outer end of the lug down onto the ground as Shetland Sheepdog says you want.
Well, so be it, but I have a number of tractor manuals & they only reference PSI.
 
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JMOR
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PostPosted: Wed Dec 06, 2017 7:25 pm    Post subject: Re: 800 Ford with pie weights tire pressure Reply to specific post Reply with quote

Maybe for all of us, you should copy one or two or more if you like that references "squat".
 
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showcrop
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PostPosted: Thu Dec 07, 2017 3:51 am    Post subject: Re: 800 Ford with pie weights tire pressure Reply to specific post Reply with quote

JMOR wrote:
(quoted from post at 20:25:59 12/06/17) Maybe for all of us, you should copy one or two or more if you like that references "squat".


OK JMOR, to start with Fordfarmer and Shetland sheep dog, and Adam at GCR tire in Manchester NH. I will try to keep thinking about this as there have been many many over the years. I will write them down as I think of them and post back. You see JMOR, PSI for given weight is only a good starting point. Given that one can never really know what the total of different types of ballast and mounted tools may be, the most effective means is to go with a performance based evaluation which is what it takes to get the tire to the desired footprint, which will be determined by the amount of "squat". I hope that this helps you to understand.
 
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Shetland Sheepdog
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PostPosted: Thu Dec 07, 2017 5:17 am    Post subject: Re: 800 Ford with pie weights tire pressure Reply to specific post Reply with quote

One more thought!
It ain't "rocket science"!
You're looking for a "happy medium".
Just get it where the "squat" is right for the normal loading!
As Showcrop says, you will never know the exact loading, and it will be constantly changing anyway!
In other words, if it looks half flat, add air!
If it looks like the outer end of the bottom lugs are an inch off the ground, let some air out!
JMHO, HTH, Dave
 
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