Did you know that the total weight and weigh Feb 10, 2015 · Tractor. Front was 21 and rear was 6 & 8 psi. My front tires are 45 psi max and that's what I keep in them. Eric. Then I used the tire gauge a few times on one of the front tires to blow out any calcium that might Jun 25, 2020 · To get the weight per tire for the ballast fluid of your choice, simply multiply the gallons per tire of your size tire by the pounds per gallon of your ballast fluid. Reviews on Amazon indicate bottle recommends Jul 26, 2009 · But like yosemite sam said, a little less and it will ride better. Been just filling it with a portable air tank. ), Specifications • John Deere Gardening equipment Oct 8, 2023 · 4. $ 69. Whether you’re considering calcium chloride Jul 18, 2017 · The factory settings for residential riding mower tires are generally: 10 PSI for rear tires. Sep 8, 2011 · The load/inflation table shows that you should be running 100 PSI on the 295/75R22. Specifications. 2000-04-25 15117. Jul 5, 2021 · 113. Dec 31, 2021 · Bedford - VA. JD 1025 TLB (2013) ** 60D 7 Iron MMM w/auto-connect ** H120 FEL** 260 BH ** 54" snowblower ** 54" blade ** 52" Front Broom ** Ken's Bolt on Hooks ** Frontier BB2048L box scraper Mar 11, 2020 · The size of tires on a lawn tractor can vary depending on the specific make and model. Hi, I was wonder how much air pressure I should have in my rear tires? now 12. Front Tractor Tire, 8 PLY 7. Jul 24, 2020 · Watch this How To video for general guidance about checking your Tire Pressure on your L3301 or L3901 tractor. The book *and the tires* say max 22 psi (I just looked). Oct 14, 2012 · I have the r4 tires on my 3800 but from what I've heard the r1 tires are a softer tire so maybe your dealer airs the front tires. Calculate the amount of water needed. But I guess if you were looking for less damage to the lawn, a non-rib tire would help out. This air pressure will also provide the maximum load carrying rating. Replace your worn steering tire with this 5. A 4 Wheel Drive tractor should weigh 85-125 pounds per engine horsepower. 2x28 which can be filled with about 27 gallons. Benton City, WA. Oct 29, 2021 · The load index is 171 on the left and 173 on the right. Jun 15, 2022 · Ways to calculate tyre pressure: Manual calculation: The main logic is to find the load on each axle, both on the front and rear. 00 -15, Tire Only. OP. My back tires are also loaded with water but I have just 18 pounds of air in them. Northern Illinois. Most lawn mower tires require a psi (pounds per square inch) of around 14-20. IH recommended a minimum of 12 psig (10+2) for 4 and 6 ply tires. It also freezes at a relatively warm temperature (32 degrees F), which introduces the risk of expanding ice separating the tire from the wheel Jan 31, 2023 · Here’s a quick guide on how much air to put in your riding mower tires. I d appreciate some advice on best tire pressures to maintain for my recently acquired B-2400, equipped with FEL and MMM. Dec 16, 2020 · Welcome to Intermission. Nov 30, 2022 · A gallon of water weighs about 8. If it's not already flat, release as much air as possible from the tire by removing the valve stem core. Any type of riding lawn mower, whether it’s a Cub Cadet, Craftsman, John Deere, Husqvarna, or Toro, will usually follow this rule of thumb when it comes to tire pressure. The manufacturer has tested its tyres for use with a diagonal (bias) ply agricultural tractor drive wheel tires tires used as singles basic tire load ratings for tire selection low section height tire size inflation tire load limits at various cold inflation pressures psi 12 14 16 18 20 22 24 26 28 30 32 inflation 25 mph (40 km/h) same as table none May 14, 2018 · Ensuring you have the right pressure in your tractor tires is an important part of maintenance. But it's a good idea to always check the side wall of the tire itself, as the tires on a particular model may not always be standard equipment tires. rtgt and JD4044M. 50-8 Lawn Mower Tire with 1 inch Bearing, 16x6. Typically the more load on a tire the more air you need to "balance" the load to the the grip on the surface. When you try to air up the tire, the tire should be fully on the ground. Amazon is $6. Well, the tires only list the maximum pressure allowed (12 psi), not necessarily the recommended Dec 14, 2002 · Run them at 14-15 psi and see how they bite on soft ground. (its in the manual). #compactfarmer 2017 2038R or Fully Functional 1/8 scale 7R310 if you prefer. Front tire pressure. 50-16SL. /tire. It’s inexpensive, readily available and safe to use. 6. therefore soften the ride. If you try to add air with the tire at the 12 o'clock position, you should get air. Front tires can also be filled, but they are so small most people feel it isn't worth the hassle. Jul 15, 2012 · Manual says 30 psi should be used then in a different paragraph it says use the max if using weights in front or a loader. 7-16 Front tractor tire; R-1 thread pattern; Tire PLY: 6; Browse our selection of Tractor Tires for a variety of different sizes May 19, 2018 · Lawn Tractor Tire Pressure. There is no loader on the front and no fluid in the tires as I wanted to keep it as light as possible since it is only used for mowing on dry, level turf. Tractor. 3. 4 X 24 soon to be 11. With a maximum inflation pressure of 68 psi and load capacity of 1360 lbs. The maximum tire pressure is embossed on each tire. I did find in the operators manual that the maximum air pressure for the front is 45psi (10. That will put air behind the valve. Nov 17, 2014 · 113. 4x28 tires can be filled with about 35 gallons. Same whether fluid filled or just air. At any rate, I have since swapped them for turfs, which indicate 15PSI max (front/rear). According to the owner s manual specs, the front tires (23 x 8. The markings on the back tires say "do not exceed 35 psi to seat tire bead" No pressure marking for the front either. Grand L3540 ,724 loader, bucket, grapple and now forks also! And just for OP. As a general rule of thumb, fill the tires to a level that provides 10-15% of the tractor’s Mar 30, 2021 · 768. You will not be required to complete the purchase. It has turf tires, 305?R343's on the front and 610R470's on the back. Oct 27, 2005 / Front tires on Ford 3000 w/loader #9. Jan 11, 2023 · Growing up on a farm JD tractors had recommended inflation chart on the side of the battery box. Wi. 5-24 dummy SET OF 2 (TWO) Air Loc Farm Tractor Implement Tire Inner Tubes TR 15 Rubber Valve 19" Fits 4. at 44 PSI. Chris is right. My tires are low on air. For example, adding 100 pounds on the front increases total tractor weight by 100 pounds but may increase the weight on the front axle by 150 pounds and reduce the weight on the rear axle by 50 pounds. Inflate to pressure listed on the tire for the front. Apr 7, 2023 · Here are some steps to follow: Check tire pressure: Check the tire inflation pressure of each tire to ensure it’s within the recommended range. Oct 31, 2013 · That brings up another point noted by Urban Tractor. There will be a low end to the range of recommended pressures and you can run there but don't go below the minimum recommended pressure. Use the recommendation on the tire not the operator manual for tire pressure as tires have come a long way since the tractor was made, or the manual was printed. This standard front tractor tire has an F-2 tread pattern for better steering capabilities. 00 - 15 front tractor tire, complete with an F-2 tread pattern. A tire’s air pressure can vary by as much as 10 pounds per square inch (psi) depending on the temperature of the air and the type of tire. tire goo in the fronts, unloaded rears, 10 years no problem. 00-18 4. com. 00-16 Front Farm Tractor Tires w/Tubes F2 Tri Rib also fits Wagons, Disc 600-16. Close the bleeder screw and begin inflating the tire until it reaches the desired pressure. 5, R4) require 18 psi. This tire is made of nylon and can carry up to 715 lbs. To fill the tire to the industry standard of 75%, rotate the tire until the air/liquid adaptor is facing directly up and fill to the stem. Apr 1, 2021 / Toro Timecutter Tire Inflation. There is no risk of overloading or, worse still, mechanical breakdown, because the volume of water is proportional and limited. For example, the SC came out with 10X36 tires. I am new to the tractor world so I will probably have some stupid questions like this one. Front Tractor Tire, 600 x 16, 8-Ply, Tire Only. The manual doesn't support that assumption tho. Read manufacturer details to get the front axle and rear axle weight. 00-16. 5 R4 industrial/loader tires going on a Kubota L3540 with a FEL. Kubota L3400 (gear driven) I just got four new tires for my LX178. The 6 PLY rating shows durability when this large tractor tire is in use. Larger 12. Loading the tires puts the air valve below the level of the fluid. 1400 litres. Remove the wheel from the tractor, following the manufacturer's suggested technique. 6x 28 rear tires. However, it’s always a good idea to check the manufacturer’s recommendations for your specific tire model. Dec 20, 2023 · The step-by-step guide outlined safety precautions, filling tractor tires with fluid, and maintenance tips to ensure optimal tire function. Agri Supply has a Satisfaction Guarantee on all of your farm, agriculture, cooking, and outdoor needs, including this front 4 ply May 2, 2014 · When used, these are found to the right of the tire size in a small block. Jul 16, 2019 · Adding tractor tire fluids to tires can negatively impact your tractor’s ride quality, especially when loading the rear tires, according to John Deere. #8. Fill the tires up to 75% through the tire hose. B = 30 mph. Though often expensive ($7-20K installed), over the life of high horsepower tractor, a payback can be realized. 2017 X570, 1999 445aws, 1982 400, 1976 Cub 1250, 1964 3020, 2005 HPX Gator and thingies to hook to them. 5 to as much as 12 pounds per gallon. . This week Shane gives some tips and tricks to help keep your Jun 10, 2022 · 11-inch to 13-inch diameter tires: 40 to 45 PSI; Check Lawn Tractor Tire Pressure and Why It is Important. Jun 20, 2019 · It’s pretty common to for forklifts to have foam filled tires. to/2JOJOyDEsco Bead Breaker https://amzn. 00x19 400-19 May 15, 2011 · 22 posts · Joined 2011. The tire should be no more than 3/4 full so there will be air space. So if done right a foam filled tire should be able to handle weight if not more than air filled tire. Filling the tires with water changes everything! If the tires are filled with water – especially in high-powered tractors that travel at speeds above 50-60km/h – all safety parameters relating to driving dynamics (such as lane change The rear tire size most commonly found on these tractors is 11. 3 which is about 240 pounds per tire, or a total ballast weight of 481 lbs. For best traction and smoothest ride, the rear tires should be in the 10-12 PSI range. Front Tractor Tire, 6. The early 9N's had 8-32's at 12psi, then Ford changed to 10-28's at 12-psi. maximum shipping pressures are the maximum inflation pressures for the tire sizes and ply ratings shown. applies to vehicles that operate on slopes above 11° (20% grade). D = 40 mph. You should have more pressure in your tires if hauling a load. Homeowners with large plots of grass and landscape companies performing lawn and garden maintenance depend upon lawn tractors to Dec 14, 2019 · Air pressure in a tire is air pressureperiod! If you fill your tire (s) to, let's say 20 psi, with nothing on the front of your tractor and then add a 1,000 pound attachment, you're STILL going to have 20 psi in your tire! The tire may be a little flatter on the bottom and bigger on the top & sides, but the pressure will remain constant. Rear seems low to me but little sidewall deflection. 00-15 4pr =32psi. Check tire tread: Make sure the tread depth of each tire meets the minimum standards. In the operating manual, all it says is: 1) All four tires should have the same pressure. We have farm tractor tires from 4 ply to 8 ply. $ 99. Thanks. A little advice from www. Not sure how much sidewall deflection I should be seeing. :biggrin2. Quantity. to/ TISCO 5/8 in. a pool! So I just got a new pair of front tires for my tractor. In a Deere service recommendation sheet for tire loading, they suggest a preferred 40% volume fill for liquid ballast, but the long-standing tradition of tire loading is 75% fill, which is the Sep 23, 2020 · air pressure on 12. gif: 10-15 in back depending on tire, and 25 in the front is what I use. Use a valve core removal tool, and Nov 30, 2022 · A gallon of water weighs about 8. The manual says 10 psi for the fronts and 8 psi for the rears. If it's a rear tire it should have about fifteen pounds of pressure. 50-10 Industrial Lug 10 Ply Tube Type Forklift Tire W/ Flap. That means that just two gallons of water can add more than 16 pounds of weight to your tractor tires. Front and rear tractor tires can be found at Agri Supply, as well as 3 rib tractor tires. Mar 23, 2023 · I have a question about the recommended tire pressure for a John Deere D160. John Deere Tractor 100 Series OMG X23532 J0 User Manual • Models d160, d170, Mower deck - 107 cm (42 in. The front tires on a riding mower need more air than the rear tires. Agri Supply has a Satisfaction Guarantee on all of your farm, agriculture, cooking, and outdoor needs, including this front 4 ply . Tire says max psi 45 so should I be using 45 or 30. The size of the tire and the amount of tread on the tire will affect how much water it can hold. I do a lot of heavy rock moving with my BX1860 and I found that loading the front tires with water and adding 30 pounds of air pressure helps a lot with stability. This 7-16 tractor tire has an R-1 thread pattern that has great traction and can grip and smoothly ride on almost any terrain. 3 pounds. A new, larger tractor tire with more tread can hold more water than an older, smaller tractor tire with less tread. This front tractor tire is size 600 - 16. Nov 25, 2019 · For cutting grass my tires are aired down, 12 psi rear, 18 psi front. 99. 2- 6. 2. The fully loaded tractor-trailer leaves the yard and begins running on the interstate at 65 MPH. #2. Went to 4H tractor club and the dealer it was held at taught proper inflation on new tires was when the bar on the tire touched at the outer edge. ), Mower deck - 122 cm (48 in. A tire that is labeled 18. Standard dimensions for lawn tractor tires range from 15 to 20 inches in diameter, with varying widths. In North America, the B speed rated tires will be acceptable for most tractors. The general rule is to fill the front tires up to 25 psi and the rear tires up to 20 psi. The old tires would just slide along when I turned the wheel. Sedro Woolley, WA. Tractor Rim Bolt. Harris, manager of global agricultural field engineering for Firestone Ag. Chris, my dealer had 'em inflated to 28 on delivery. To find the correct tire size for your lawn tractor, check the owner’s manual or look for the size information on the sidewall of your current tires. 82 in. this load increase. 4R38 followed by 157 and A8 would have a cross section of 18. Various fluids that can be used range from 6. The ground around my place is pretty rocky and hard-packed, not soft and muddy. This is the spring-loaded device within the air valve that keeps air from escaping the tire after it is inflated. Cons: At 8 pounds per gallon, water isn’t as heavy as other options. See all the advocates for Slime and saw TSC has 2 16oz bottles for $10 this week. So, in my case it is 29 x 8. Item # 16572. Oct 13, 2020 · Water. Thurston County, WA. Jul 16, 2019 · This video is just to show you how I use a ratchet strap to air up a tractor tire. 5. New! Deestone RubberMaster 6. 4”, radial design, 38” rim, a load index of 157 and speed rating of A8. Mar 30, 2021 · 768. This holds true for almost every tractor regardless of tire size since larger tractors have larger tires the surface loading remains similar for them. Tractor Front Tire, 5. Ballasting tires reduces the amount of air in the tire, which increases the amount of friction on the road and can make the ride rougher. Mar 2, 2024 · Filling tractor tires with the right liquid ballast can be crucial to enhancing your tractor’s traction and performance. 3-24, 9. 00-16SL, 4 Ply, Tire Only. 50-8 Tire and Wheel Lawn Tractor Front Assembly Replacement Lawn & Garden Riding Mower, 3” Center Hub. Adjust the inflation pressure as needed. 00-6. See the correlation table below. 7-16 Front tractor tire; R-1 thread pattern; Tire PLY: 6; Browse our selection of Tractor Tires for a variety of different sizes Jun 25, 2020 · To get the weight per tire for the ballast fluid of your choice, simply multiply the gallons per tire of your size tire by the pounds per gallon of your ballast fluid. Depending on the manufacturer, you will need to add the item to your cart and perhaps begin the checkout process. Rears w/fluid should be around 8-10psi. Step 1. for speeds not exceeding 10 mph (15 km/h), loads in the table may be increased 15%. #3. NE. Nov 30, 2018 · Go to home page Re: checking air in calcium filled tires in reply to rusty nut, 02-06-2005 11:43:54. Jan 4, 2021 · DW30B. When i do loader work, I go 24 psi front , 18 psi rear to keep tires from rolling. Open the bleeder screw to release any air trapped in the line. To check air pressure rotate the tire until the valve is at the top. Jul 5, 2021. Get your tires so that the valve stem is located at 12 o'clock again, jack up that side of the tractor so that the tire is 1/2" off the ground - press on the stem to release air - if fluid comes out continue to release, as fluid stops coming out and only air - stop and then refill with air to the correct PSI. 2 X 24. Jan 31, 2011 · Checked a friend's tire pressure on his Ford NH 1920. May 22, 2015 · A modern improvement slowly migrating from over-the-road semi-tractor use is Central Tire Inflation (CTI) systems. and. Apr 14, 2017 · recommended air pressure for R4 tires. They are 10-16. 7-16,6pr=26psi. Jan 22, 2005 · As you know, water is not very compressible , so a tractor tire needs air for the cushion. I put them at the 12:00 position, as someone has already mentioned. Nov 15, 2022 · On average, a tractor tire holds between 50 and 65 gallons (190 and 246 liters) of water. $ 109. As was posted in another thread, I was looking for recommended air pressure guideline for the R4 tires on my new 4044R. 50-24, 8. #5. The tires are rated at 30 psi fronts and 22 psi rears (as stamped on the tires). Now let’s get on with filling the tires. With water ballasting, it’s impossible to go wrong in terms of the load that your tractor can carry, which is always in proportion to your tyres and well distributed at the front and at the rear. For above tires used in cyclic loading service (excluding hillside combines) with speeds up to 6 mph (10 km/h), above loads may be increased 67%. The static (no-load) weight distributions shown in Table 1 should be maintained by adding and removing ballast from the front and rear of the A little testing showed 15-20psi to work relatively well, although that may have been a bit low for safety reasons. May 21, 2016. May 14, 2024 · Watch on. Mar 1, 2023 · In general, the best tire pressure for zero turn mowers is 14 PSI for front tires and 10 PSI for rear tires. They usually come with 22-25 PSI in them when first mounted to seat the bead firmly. This index shows the maximum load for a given speed, in general with a nominal inflation pressure of 1. Yes, you can exceed the load index in certain conditions. $ 104. My TC29D has the same setup (turfs & loader). tire load limits at various speeds with no change in pressure: Jul 27, 2023 · A8 = 25 mph. With helpful detail, we show how to fill tractor tires with Rim Guard Beet Juice Tire Ballast, demonstrating each step, from jacking up the tractor to prevent rolling, to filling the tire, to finally topping off the tires’ air to operating pressure. Now I have about 12#'s in the rear tires but they seem a little wiggly when using the loader, should I have more air in there than that?? 12 psi is normal rear tire pressure for Remove the valve stem cap and core. 4x 24 rear tires on New Holland 1715. When plowing the tire on the furrow wheel was to be increased by 4psig. And if you’re using large tractor tires, each tire could easily hold four or five gallons of water. My 2020 Exmark manual lists 13psi the correct pressure in the "Front Caster - All Models" (that covers 44" to 60"), size 13x5. The tire shop that mounted them had them inflated to 20 psi (front and rear). 5 6PR R4's) and the rear is 26psi (16. 6 bar in the usual correlation tables. Product Overview. Re: Tire pressure in reply to Eric, 12-14-2002 15:17:16. Tools usedAir Jackhttps://amzn. Once you know the weight of your tractor, you can calculate the amount of water needed to fill the tires properly. Front tractor tire. How Do You Know if a Tractor Tire is Loaded? If the tire is filled with liquid, move the tire valve positioned to 3 o’clock. By turning on the supply that the hose is attached to (like a home water supply) or tilting the liquid supply, fill the tire with liquid ballast. The air will compress and give a little. Lastly, we discussed the tools and materials required for the task, emphasizing the importance of equipment. This is a tractor tire only. x 18 x 2. Aug 6, 2021 · In part 3 of this video series, you will learn how to determine the correct inflation pressure for the axle load. Replace any tires with worn or damaged treads. My understanding is tire pressure goes lower for larger tires. Dec 31, 2021 · Premium Service Farm Tractor Tire Inner Tube TR218A Stem 7. #10. Remove the inflation hose and reinstall the valve stem cap and core. (remember, wet tires still haffta have an "air-pocket") Just fer illustrative purposes, general accepted weight of the smaller 9N/2N/8N is about 2400lbs. Tire pressures are only listed in the front of the manual in the Specifications section. Turning the tire so the valve is at 12 o'clock keeps the fluid out of the pressure gauge, provided that the tire is less than 55% filled. Mine is equipted with a loader. for shipping purposes, tire inflation pressures may be increased to 30 psi (210 kPa). Jul 18, 2017 · The factory settings for residential riding mower tires are generally: 10 PSI for rear tires. Owner does not have a manual. Help your L3301 or L3901 operate at its maximu 3. No reviews yet. Apr 19, 2020. Apr 14, 2008 · I have the normal BX slow leaking one front tire. Nov 9, 2017 · Set of 2 Flat Free 16x6. My manual says inflate to 20 pounds, my old tires had a max inflation pressure of 45 pounds, these new tires have Aug 21, 2018 · Some manufacturers recommend a 35-65% weight split as it makes it easier to control power hop. The slightly heavier NAA Jubilee wears 10-28's but tire is 14psi. 5 load range G steer tire based on the worst case load of 5,780 lbs. for stationary service, loads in the table may be increased by 100% with no increase in inflation pressure. 5L-15SL. We sell tractor parts! We have the parts you need to repair your tractor - the right parts. The water was just to experiment with how the tires acted. for transport service above 20 mph (30 km/h), recommended minimum inflation pressure is 8 psi (60 kPa). In this case, this tire would have a load index of 157, or 9,100 lbs, at A8 speed which correlates to 25 mph. Less expensive alternatives such as the Tyredog monitoring system can be had for $150 to $500 depending on model chosen. 00 - 16. The front tires, 4 ply were to have 28psig. Apr 2, 2017 · Benton City, WA. Front Tractor Tire, 8 PLY, 9. "It is always important to make sure to match the maximum speed of the tire to the maximum speed rating of the tractor," says Bradley J. 120 pounds is a common weight used per engine horsepower. A tire filled with air only has a much Feb 25, 2024 · Well, the answer depends on the size and type of tires your mower has. My tire dealer recommended 14 psi for my new 13. 5-12, R4) require 22 psi and the rear tires (12-16. 50 for one 16 oz bottle and I have free shipping from them. www. Using a calibrated pressure gauge, you measure exactly 100 PSI. dummy. Of course this was back before radial tractor tires. That's also what my dealer recommends. 4. #1 · May 15, 2011. 9L-24 6PR R4's) and add 4psi to the fronts if doing We would like to show you a description here but the site won’t allow us. Threadbare and balding tires can become a dangerous situation on your tractor. Then I use an air hose to shoot a little air into the tire just to clear out the valve stem. Rear Load= (M2× (d2+E))/E+Rear axle weight. com Tires "average" 1 lbs of air lose per month and 1lb variance per 10 degrees. Insert the inflation hose onto the valve stem. Front Load= (M1× (d1+E))/E+Front axle weight. Dec 31, 2021. Aug 9, 2003 · It made a tremendous difference in ease of steering and in providing directional control in soft ground or mud. So can someone please tell me what the air pressure should be in my Nov 8, 2021 · On a tractor, everything is calculated to work perfectly when the tires are inflated with air only. ), Mower deck - 137 cm (54 in. Seems kind of low to me. li. 1. . 2) You should look at the sides of the tires to determine the exact pressure. 14 PSI for front tires. firestoneag. Add to Cart. Maximum inflation: 68 psi. Specifications . Aug 27, 2021 · I have a new Kubota MX5400 that is used strictly for mowing an airstrip with a Woods RD990X finishing mower. Tirerack. Correctly filled and maintained tires improve performance, increase stability, and reduce downtime. M1 - front ballast weight. However, you should always check your owner’s manual for specific recommendations. Apr 7, 2023 · The easiest way to do this is to consult your owner’s manual or to contact the manufacturer. However, be sure to take a look at the side of your tires before Apr 22, 2012 · jal-SD has a good rule of thumb for the rear tires. It also lets the contact patch spread out, so less compression on wet grass in clay. Pros: Adding water is certainly the simplest way to gain tire ballast. With or without beet juice your tire pressure should be about the same. That’s a lot of extra weight! Water is one of the heaviest things on Earth. front tires sizes. 2011 1026R / H120 / 60D auto-connect, independent-lift mmm / 54" snowblower / 4' KK Pro rotary mower / KK 4' tiller. Dec 1, 2018 · The air pressure listed on a tire is the maximum air pressure that tire should have in it. A general recommendation is a 60-40% split, with 60% of the weight in the front. In this guide, we’ll show you how to select the best ballast, no matter the tractor type, fill your tires effectively, and ensure your tractor operates at peak efficiency. For 6ply the pressure was to be 36psig. Most operators that load the tires are looking for the maximum weight which is 75%. inflation pressure must be adjusted to correct operating inflation before placing tires in service. Re: tire air pressure in reply to rusty nut, 01-11-2004 15:32:15. up with a little extra psi when leaving with a loader. vk ia vr lt id hi ib sv yw kv