Proper inflation?

[Fastball]

My dad's tractor is a 4x4 L2900 with R-4 tires sized 13.5 x 16.1 on the rears.
I'm not sure if the tires are loaded - but when I was messing with the valve, liquid did come squirting out.
Anyways, I had a tire guy come over in the fall when one of the fronts came off the wheel and he pumped up the tires. But I want to make sure of the pressure. He had almost 28 psi in the rears. I see guys here taking about 14-20 psi in their rears. I knocked it down to just over 20.
What should they be at?

 

[ovrszd]

Sorry I'm not familiar with your tractor. I don't understand what you said in regards to tire size??

Typically on a CUT rears I would run 12-18 depending on size. Fronts I would run 16-24 again depending on size and whether it has an FEL.

 

[Oldpath05]

On my L3400 11.2-14 AGs, just had them reloaded with 15-18 psi, the place that did them put in 20, was just a tad to hard. ("but when I was messing with the valve, liquid did come squirting out.")<<<<<If the liquid was clear-ish could be calcium, I'd change valve core's if the stuff has been in there a while.

 

[Texasmark]

I run all mine as soft as I can considering the machine and circumstances. For example the 33,12.5x16.5 tires on the rear of my 24 hp 1800# 2400 are rated 2600+# each at 30 psi max rating. That's 5400# of buoyance on an 1800# machine. Guess what that does to your butt and back? For me it's my comfort. The tires will just have to bear the brunt. I run those at 6-8. My other tractors are running 28" rims with ag tires (R1s) and I run them at 18 max. I think they are rated for 18 max.....check the sidewall of the tire. Lots of them tell you the max to support a given rated load which is there for your viewing also.

 

[Fastball]

I run all mine as soft as I can considering the machine and circumstances. For example the 33,12.5x16.5 tires on the rear of my 24 hp 1800# 2400 are rated 2600+# each at 30 psi max rating. That's 5400# of buoyance on an 1800# machine. Guess what that does to your butt and back? For me it's my comfort. The tires will just have to bear the brunt. I run those at 6-8. My other tractors are running 28" rims with ag tires (R1s) and I run them at 18 max. I think they are rated for 18 max.....check the sidewall of the tire. Lots of them tell you the max to support a given rated load which is there for your viewing also.

Checked the sidewall...all it gave was a max of 30-odd psi. I drove it around today at 20+ psi and it's still a tad bouncy. I'll knock it down to 15 or so and see what it feels like.

 

[Wagtail]

This website may assist: Tire Pressure Calculator - Titan International

 

[Fastball]

This website may assist: Tire Pressure Calculator - Titan International

Not sure how to enter in the metric equivalent of 13.5 x 16.1 - which Are the only numbers on the sidewall.

 

[JimRB]

Google inch to mm or something like that. Inches to Millimeters conversion | inches to mm

 

[s219]

If you are moving heavy loads, you'll be at the higher end of the scale. Since that's about all I do with my tractor, both with FEL and 3-pt, I run at max. You can back off for other tasks.

 

[Fastball]

Yeah, I'm at the max on the fronts, what with the FEL, etc.
As for the rears...I found this - http://www.titanstore.com/info/499505.
$777 dollars? Really? Holy cow...why the massive price?

 

[Wagtail]

Why the massive price? (other than the physical size of the tyre) Well, rough agricultural terrain requires a tractor tyre that is resistant to irregular wear, abrasion and puncture. A tyre for a tractor or agricultural vehicle must be considerably stronger than the average passenger tyre or commercial vehicle tyre. The reason for that is quite simple, considering the fact that tractors and agricultural vehicles often come in contact with rough on-road and off-road conditions.

The biggest problems with tractor and agricultural vehicle tyres are abrasions and irregular wear, considering the surface drivers of tractors and agricultural vehicles often find themselves on.

Tractor and agricultural vehicle tyres can be compared to passenger tyres and commercial vehicle tyres in one aspect – the properties they can deliver on certain surfaces. For example, if the driver of the tractor often deals with dry conditions, such as small pebbles or debris, there will be a need for a tyre that can handle these kinds of surface conditions.

Short version; they're 'speciality' tyres.

 

[teg]

I run my front tires at max psi listed on tire, 45 psi (I do have a slow leak in one). I do a fair amount of heavy lifting and have broken the bead on that front tire a few times because of low tire pressure.

Ratchet strap in the middle of the tire, tighten and aired it up... has re-seated the bead.

Rear tires I check once in a blue moon, once it didn't even register but you couldn't tell by looking at it. Aired it back up to 20 psi.

 

[Texasmark]

Checked the sidewall...all it gave was a max of 30-odd psi. I drove it around today at 20+ psi and it's still a tad bouncy. I'll knock it down to 15 or so and see what it feels like.

I drop them as low as I can with these constraints: the tire stays on the wheel, if a drive tire it doesn't slip on the rim when under a heavy load, I watch the sidewall and load and if sidewall shows much pooching I air it till it's barely visible. Once finished with load, if seldom I bleed back down. If frequent I leave it be and get my seat air cushion, OTR truckers use them, on the www, $90 just a little air, maybe half psi, blow up by mouth with just enough air presssure to make them work....best $90 I ever spent.

 

[dnw64]

I found this - http://www.titanstore.com/info/499505.
$777 dollars? Really? Holy cow...why the massive price?

I can't really say, but here are a couple ideas.

First and foremost, that is a really oddball size. I have never seen it before, although truth be told I'm not an experienced AG guy. And "if you need it you will pay for it".

Coupled with Reason No1, anything that is low production will be expensive. The simple fact that it costs a lot more to do low production runs on anything, and something like a tire where you have massive upfront costs for engineering and tooling, plus all the typical setup inventory issues and it all adds up to $$$$.

 

[Fastball]

I can't really say, but here are a couple ideas.

First and foremost, that is a really oddball size. I have never seen it before, although truth be told I'm not an experienced AG guy. And "if you need it you will pay for it".

Coupled with Reason No1, anything that is low production will be expensive. The simple fact that it costs a lot more to do low production runs on anything, and something like a tire where you have massive upfront costs for engineering and tooling, plus all the typical setup inventory issues and it all adds up to $$$$.

Hmmm....I'm getting the sense that they are indeed an oddball size. I will ask at the dealership if there are substitutes to be had in my situation. They're getting to know me quite well now....I bought bolt-on pallet forks last week, and they have 3-point quick-hitches on sale this month.

 

[Texasmark]

Not sure how to enter in the metric equivalent of 13.5 x 16.1 - which Are the only numbers on the sidewall.

First number is tire width, and second is the diameter of the mounting flange upon which the tire is mounted.... like measure the tire bead diameter (the hole in the doughnut width) with the tire off the wheel

MM to Inch conversion is 25.4 mm per inch. So 13.5 x 16.1 = 343 mm x 409 mm.

IF you have a 3rd dimension it's overall diameter when inflated. My R4s only have the 2 but my R3 (turfs) add the overall dia as I posted in my earlier reply.