Tire Pressure
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=155334
Printed Date: 18 Jul 2025 at 10:33pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: Tire Pressure
Posted By: FREEDGUY
Subject: Tire Pressure
Date Posted: 05 Nov 2018 at 6:41am
What are you guys running for pressures in 18.4 34's? These are old G/Y's, 6 ply non-filled duels. No info in the 190 manual except to contact A/C dealer? Odd that the 180 manual has specs though. Btw, we put 15 #'s in them  . Thanks
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Replies:
Posted By: Allis dave
Date Posted: 05 Nov 2018 at 6:45am
| Are they Bias Ply or radials? You run less air pressure in bias. 15-18 for a bias, around 13-15 for a radial. You're pretty good either way. If you carry a lot of 3-pt weight and notice them squatting a lot, add a little more. |
Posted By: FREEDGUY
Date Posted: 05 Nov 2018 at 6:56am
| Now you have me thinking LOL!! will the sidewall state bias or radial?I did see a R-1 on the sidewall. |
Posted By: Allis dave
Date Posted: 05 Nov 2018 at 7:34am
| They usually have a "R" before the rim size. Like 18.4 R34. THey probably say radial somewhere as well if it's still readable. Radials always squat a little more than bias ply and get a little better traction. |
Posted By: HD6GTOM
Date Posted: 05 Nov 2018 at 12:57pm
| What else does it say on the sidewall. Goodyear had several different tires for example, Good year Traction Torque, Good year Power Torque. They had several other names to. |
Posted By: SteveM C/IL
Date Posted: 05 Nov 2018 at 1:24pm
| Radial will say so.Minimum of "R" in the size. |
Posted By: DougS
Date Posted: 05 Nov 2018 at 2:09pm
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R-1 is the tread type. Look for the R in the tire size. |
Posted By: FREEDGUY
Date Posted: 05 Nov 2018 at 6:45pm
| Now I am extremely curious but will have to look tomorrow and report back. Thanks to all replies !! |
Posted By: dawntreader74
Date Posted: 05 Nov 2018 at 7:14pm
| like they say; 14-15 psi' should be fine. |
Posted By: DanWi
Date Posted: 05 Nov 2018 at 10:03pm
| If you are using them as outer duals I would drop the pressure to 10- 12 pounds, you don't carry that much weight and the crown of the tire is lower and a little less stress on things. |
Posted By: KJCHRIS
Date Posted: 05 Nov 2018 at 11:04pm
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From an AC200 Oper Man'l., tire info on page with Grd Speed chart and oil, fuel, coolant capacity chart. Man'l is from before we had radial tractor tires!! 18.4-34 R2 6ply; 16 psi. 18.4-34 R1 6 ply; 16 psi. 18.4-34 R1 8 ply; 16 min 20 max psi. 18.4-38 R1 6 ply; 16 psi. 18.4-38 R2 6 ply; 16 psi. ------------- AC 200, CAH, AC185D bareback, AC 180D bareback, D17 III, WF. D17 Blackbar grill, NF. D15 SFW. Case 1175 CAH, Bobcat 543B, |
Posted By: FREEDGUY
Date Posted: 06 Nov 2018 at 6:44am
That's basically the same chart that's in the 180 OP manual except tire sizes. I wonder why that info is not in the 190 OP manual but starts again wit a 200 ?? Thanks for posting that.
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KJCHRIS wrote:Posted By: jaybmiller
Date Posted: 06 Nov 2018 at 6:48am
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speaking of missing info.. NOWHERE in my 97 F150 manual is the torque for the lugnuts !!! I'd have thought that was kinda important ? Jay ------------- 3 D-14s,A-C forklift, B-112 Kubota BX23S lil' TOOT( The Other Orange Tractor) Never burn your bridges, unless you can walk on water |
Posted By: TimCNY
Date Posted: 06 Nov 2018 at 6:56am
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It is. Too many people have no idea. And then they wonder why they go through (disc) brakes so fast. "Tight as I can get 'em!" is neither correct, nor an actual torque value lol I know, I know... on certain forums I've been given the dubious honor of being named "Torque Anal." But if torque settings didn't matter, why list them? |
Posted By: TimCNY
Date Posted: 06 Nov 2018 at 7:04am
| FWIW, on my F350 SD dually, it's 148 ft.lbs. But I don't recall what it was when I had F150's, IIRC it was 100 ft.lbs., but I remember for certain wheels (alloys) and vehicle packages the torque was 150. Good to ask the dealer service center, I'd say. |
Posted By: DougS
Date Posted: 06 Nov 2018 at 7:36am
| They spec 89 for my car. It has fancy-dancy factory wheels. 89 crosses to 130 nm or something like that. I changed to winter tires last weekend and I didn’t get a hernia removing the lug nuts, yet they were sufficiently tight. I use a torque wrench - a good enough one can be had for under $40. Doncha love it when you see a tire shop using an impact wrench to buzz the lug nuts on? |
Posted By: Clay
Date Posted: 06 Nov 2018 at 7:41am
| Our local tire shop uses an impact wrench and finishes up with a torque wrench. |
Posted By: Ed (Ont)
Date Posted: 06 Nov 2018 at 7:47am
| So a little less in bias ply Dave? Your post seems to have the numbers reversed then. |
Posted By: Lonn
Date Posted: 06 Nov 2018 at 8:03am
------------- -- --- .... .- -- -- .- -.. / .-- .- ... / .- / -- ..- .-. -.. . .-. .. -. --. / -.-. .... .. .-.. -.. / .-. .- .--. .. ... - Wink I am a Russian Bot |
Posted By: Gerald J.
Date Posted: 06 Nov 2018 at 9:44am
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Way back before aluminum wheels I was taught to tighten lug nuts until they squeal no torque setting. The need for a torque wrench came with aluminum instead of steel wheels because the aluminum couldn't stand the torque that steel took. My JD '98 4020 manual says for 18.4-34 run 16 psi for 6 ply tires for all occasions. For 8 ply it says run 20 psi instead of 16 if the tractor has lots of weights or very heavy mounted implements. Otherwise 16 psi. Gerald J. |
Posted By: Allis dave
Date Posted: 06 Nov 2018 at 1:15pm
Radial get better traction than bias and use less air pressure, They have a better footprint. I found this on Firestone's sire. Calculate your tire pressure need. http://commercial.firestone.com/en-us/agriculture/resources/tire-pressure-inflation-calculator" rel="nofollow - http://commercial.firestone.com/en-us/agriculture/resources/tire-pressure-inflation-calculator |
Posted By: FREEDGUY
Date Posted: 06 Nov 2018 at 6:03pm
| The tires say POWER TORQUE on the sidewall and no where does it say bias or radial. One says made in Canada and the other USA . Our torque spec for the combine logs is on a sticker on the rim, and it seemed like ALOT?? BTW, the F2 drives are Firestone ALL TRACTION 23* 28L-26's,12 ply tubeless and again, R-1 and no mention of B or R. Dad did call the local tire shop for pressure recommendation and they only offered 10-16 PSI. Any thoughts on pressure in them? Thanks |
Posted By: SteveMaskey(MO)
Date Posted: 06 Nov 2018 at 6:25pm
| For bias ply rear tires I have always run a pound per inch of width. 13.6 - 13 lbs. 14.9 – 14 lbs. 18.4 – 18 lbs. |
Posted By: AC7060IL
Date Posted: 07 Nov 2018 at 12:37am
Your F2 28Lx26s, are floatation tires & a great setup for wet muddy harvest years. Their low 8-10lb tire pressure in mud, will nearly enable the F2 to walk on water. The 12ply seems excessive until you consider crop stubble damage. This is especially true if operating with lower pressure 8-10lbs in corn stalks if your fields have narrow rows that your tires are constantly running down. A squatting sideways of a 6ply are extremely prone to be punctured from corn stalk stubble. Not so much with a 12 ply though. |
Posted By: Allis dave
Date Posted: 07 Nov 2018 at 6:23am
Ya know... I didn't cat that you said duals... Dan got it right, We usually run about 5lbs lower in duals. It keep more of the weight on the inner tires and stresses the final drives less. Especially when driving on humbs or the edge of a drive. If the tires don't say R in the size, then they're not radials.
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Posted By: Lonn
Date Posted: 07 Nov 2018 at 6:42am
https://commercial.firestone.com/en-us/agriculture/resources/tire-pressure-inflation-calculator?application=combine&axleLoadWithGrain=13450&axleLoadWithoutGrain=9100&axlePosition=Front&axleSetup=singles&speed=6&tireMeasure=standard&tireSize=28L-26&undefined=&unitOfMeasure=standard#summary" rel="nofollow - https://commercial.firestone.com/en-us/agriculture/resources/tire-pressure-inflation-calculator?application=combine&axleLoadWithGrain=13450&axleLoadWithoutGrain=9100&axlePosition=Front&axleSetup=singles&speed=6&tireMeasure=standard&tireSize=28L-26&undefined=&unitOfMeasure=standard#summary My guessing on weights gives me 16 psi for your F2. I wouldn't run any lower than that. My L2 book says 24 psi with 23.1 x 34. ------------- -- --- .... .- -- -- .- -.. / .-- .- ... / .- / -- ..- .-. -.. . .-. .. -. --. / -.-. .... .. .-.. -.. / .-. .- .--. .. ... - Wink I am a Russian Bot |