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Help please on tire Preasure

Started by cutter88, May 06, 2014, 10:06:59 AM

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cutter88

What should I be running for tire psi on  front and rear of a 640d John Deere cable Skidder with 24.5x32 primax forestry tires ????
Romans 10 vs 9 
650G lgp Deere , 640D deere, 644B deere loader, 247B cat, 4290 spit fire , home made fire wood processor, 2008 dodge diesel  and a bunch of huskys and jonsereds (IN MEMORY OF BARRY ROGERSON)

dnash

The owners manual calls for 30. A little more or a little less probably won't hurt them.
JD 440C
JD 640D
Timberjack 205HR
JD 329E skidsteer
JD CT322 skidsteer

chester_tree _farmah


I know Firestone has charts for their tires. The 16.9x30s Forestry Specials they list for 30, 35 and 40psi. I think. They list load capacity at each and it goes up of course. Maybe they have one online too? So you can go higher most likely. Hey if u are running on hard pack go to 40 and increase your feet per gallon?  ;D I bet it may add up over the course of a year if u put a lot of hours in. Diesel is $4.09 here..... rougher ride though.
254xp
C4B Can-Car Tree Farmer
Ford 1720 4wd loader hoe

247ktmmx

I ran 50 in 23.1 - 26 never had a problem my tires were bald

Dave Shepard

Those numbers sound really high for a large tire. The tire pressure chart on the roof of the 208 says something like 17 or 19 for 18.4x26.
Wood-Mizer LT40HDD51-WR Wireless, Kubota L48, Honda Rincon 650, TJ208 G-S, and a 60"LogRite!

barbender

I'very read on here where guys were running lower pressure in the 15-20 psi range, and having trouble with "punchers", limbs coming through the face of the tire. I had this happen, now I'll have to put a boot in the tire.
Too many irons in the fire

Ed_K

 When i first got my skidder i ran at 25psi and had problems with rim slipping,riping the valve stem out.Been at 35 and no problems.
Ed K

redprospector

The manual for my 440b calls for 16 to 18 psi I believe.
I usually run mine around 20, if I go any higher I loose traction, if I go any lower I can't stand to watch the side walls wrinkle under load. I haven't had any trouble with punctures at 20 psi.
1996 Timber King B-20 with 14' extension, Morgan Mini Scragg Mill, Fastline Band Scragg Mill (project), 1973 JD 440-b skidder, 2008 Bobcat T-320 with buckets, grapple, auger, Tushogg mulching head, etc., 2006 Fecon FTX-90L with Bull Hog 74SS head, 1994 Vermeer 1250 BC Chipper. A bunch of chainsaws.

Brleclaire

You can go as high as 45 psi. 35 is what we run on our 24.5x32's.

cutter88

Quote from: Brleclaire on May 07, 2014, 12:07:33 AM
You can go as high as 45 psi. 35 is what we run on our 24.5x32's.


Thanks that's what I was looking for :)
Romans 10 vs 9 
650G lgp Deere , 640D deere, 644B deere loader, 247B cat, 4290 spit fire , home made fire wood processor, 2008 dodge diesel  and a bunch of huskys and jonsereds (IN MEMORY OF BARRY ROGERSON)

Dave Shepard

Are forestry tires designed to run higher pressures than Ag tires?
Wood-Mizer LT40HDD51-WR Wireless, Kubota L48, Honda Rincon 650, TJ208 G-S, and a 60"LogRite!

Maine logger88

I have always run the 23.1x26 on my 540 at 25 and haven't had much trouble
79 TJ 225 81 JD 540B Husky and Jonsered saws

Reddog

Quote from: Dave Shepard on May 07, 2014, 09:20:11 AM
Are forestry tires designed to run higher pressures than Ag tires?

From what I have seen, yes.

The forestry tires have more plys and thicker cases. Which gives them higher load ratings by using higher pressures.

But the trade off is higher ground pressure. The higher the psi the more ground compaction and rutting in soft conditions.

Kemper


coxy

23 1 26 30psi 18 4 34 30psi  never had any trouble

Corley5

30-35 PSI in 18.4X26s on the forwarder.
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