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Tractor Maintenance & RepairFixing a Flat Tractor Tire
A flat out in the field is a safety job before it is a repair job. Block the tractor, support it properly and decide what you can handle.
Key points
- Stop, block, lower implements and remove the key before anything else.
- Use soapy water to find leaks, and check the valve core first.
- Sidewall damage usually means replacement, not repair.
- Never work under a tractor held only by a jack or a loader.
- Call a mobile tire service for big, liquid-filled or hard-to-lift tires.
What should you do first with a flat tractor tire?
Stop on the most level ground available, set the parking brake, lower any implement, shut the engine off and remove the key. Chock the wheels on the opposite side from the flat. Do not drive on a flat tire for any distance, because that can destroy the tire and the rim.
Look at the tire. A nail or a thorn may be obvious. A valve stem leak or a bead leak may not be. If the tractor is on a slope, move it to level ground only if you can do so safely, and only after checking whether the tire can still roll.
How do you find where the tire is leaking?
Mix soapy water in a spray bottle and spray the tread, sidewall, valve stem and the rim edge. Bubbles show the leak. Check the valve core first, since a loose or bad core is a common and cheap fix.
If the tire holds air briefly after inflating, leave it inflated to find the leak, and keep clear of the sidewall while you work. A valve stem cap that is missing lets dirt into the core and causes slow leaks, so keep caps in place.
Can a tractor tire be repaired?
Small punctures in the tread area can often be repaired by a tire shop. Sidewall damage, large cuts, bulges, or damaged cords are generally not repairable. Whether to repair depends on the tire and the damage, so ask a tire professional.
Plugs or temporary sealants have limits. Do not trust a quick patch for hard work on a loader tractor or for road travel. If you must limp to a safe place, drive at the slowest possible speed and only for a short distance, and call a shop first.
- Tread punctures: often repairable by a shop
- Sidewall cuts and bulges: usually not
- Bead leaks: may need cleaning and reseating
- Valve stem or core leaks: simple to fix
How do you jack and support a tractor safely?
Follow the manual for approved jacking points. Use a jack and stands rated for the weight, on firm, level ground. Never rely on a jack alone, and never crawl under a tractor supported only by a jack, a loader or a block of wood.
A tractor can be very heavy and can shift when a wheel is removed. If you are not sure of the setup, do not lift it. Call a mobile tire service. Keep a rated jack, a couple of stands and wheel chocks on the tractor or in the truck, since the work site is rarely the shop.
What about liquid-filled tires?
Tires filled with liquid ballast are far heavier and the liquid can be messy and, depending on the type, harmful to soil, plants and metal. Removing the wheel can be dangerous because of the weight.
Do not attempt to deal with a liquid-filled flat on your own unless you have the right equipment and training. A tire service can pump out or manage the fluid safely. Keep children and bystanders away from the machine while a wheel is off the ground.
What causes repeat flats?
Look for the pattern. Flats on the same tire may mean a cut inside, a damaged rim, a faulty valve, or something in the field such as fence wire, stakes or metal debris. A tire on a 5-acre homestead used around a brush pile or an old fence line meets more hazards than one on clean ground.
Walk the ground you work on, and remove debris. Keep a pressure gauge handy and check often, because slow leaks lead to bigger problems. If a tire fails often in one field, look for tile, stakes or old buried wire, and mark them for later.
When should you call a mobile tire service?
Call for bead breaking, mounting, demounting, large tires, liquid-filled tires and any tire you cannot lift or support safely. They come to the field, which saves hauling.
Ask your dealer or neighbors for a trusted service. Having a number saved before you need it makes a flat tire a short delay. Keep a number for a mobile tire service on the dash, and a spare valve core in your kit.
Sources and further reading
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