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Tractor and Combine Fires

Tractors and combines work hard in dry, dusty conditions, which is where fires are most likely to start. A few steady habits cut the risk, and a plan for the day it happens protects you.

Why are tractors and combines at risk?

Both machines run hot engines and exhaust systems close to crop material, dust and fluids. Combines add moving belts, chains and bearings that can overheat when they are dirty or worn. Long work days in dry weather make a small ignition more likely to spread.

Fire can start inside the machine where you cannot see it, then show itself only as smoke. That is why prevention depends on regular cleaning and checking rather than on spotting flames.

• Hot exhaust close to residue
• Bearings, belts and chains that overheat
• Leaks and electrical faults near fuel

What daily checks help most?

Before work, look over the engine area, exhaust, battery, wiring and hydraulic and fuel lines. Remove built-up residue by the method your operator manual describes. Check that guards and shields are in place, since they can also trap material.

During the day, stop and look for smoke, hot smells or unusual noise. After work, check the machine again, because heat can linger and start trouble after you leave.

• Clean around engine, exhaust and bearings
• Check lines and wiring for rubbing
• Re-check after shutdown in dry conditions

How do belts, bearings and chains cause fires?

Friction makes heat. A dry or failing bearing, a slipping belt or a chain that rubs can reach temperatures high enough to ignite dust and residue. Lubrication and replacement schedules are set by the manufacturer, so follow the manual and use the parts it calls for.

If you notice squealing, grinding, a hot smell or a bearing that feels much warmer than its neighbors once the machine is stopped and safe, deal with it that day. Waiting for the end of the field is a common way small problems become fires.

• Follow the lubrication schedule in your manual
• Replace worn parts before they fail
• Stop for unusual noise or smell

What should I carry and know before I need it?

Keep a rated extinguisher mounted where you can reach it, and make sure it is inspected and charged. Ask your fire department or a qualified provider to show you how it works. Keep a phone in the cab and know your field location or nearest address.

Teach every operator, including family and seasonal workers, the plan: stop, get clear, call 911. Decide in advance where the machine can be moved if the situation allows, away from standing crop and buildings.

• Mounted, charged extinguisher
• Phone and field location ready
• Plan shared with every operator

What should I do if my tractor or combine catches fire?

Stop, shut down if you can do so safely, and get out. Move away from the machine and call 911 with your location. Do not stay in the cab to save equipment. If it is safe and the fire is small, a trained operator may decide to use an extinguisher, but never at the cost of a clear exit.

Keep people and animals back. Fire can spread to standing crop, so tell the dispatcher what is nearby. Official guidance and hands-on practice come from your fire department, NFPA and the equipment manufacturer.

How should I follow up after a fire or near miss?

Write down what happened, what you saw and where the machine was. A near miss tells you where to improve cleaning, maintenance and training. Share it with the people who run the machine with you.

Ask the dealer and your insurance provider what they need, and talk with your fire department about a debrief. A hot machine that did not catch fire is still a lesson worth learning from, and the people who share a close call help everyone else avoid the same one.

Does weather change how I should work?

Dry, hot, windy conditions raise risk for any machine in the field. Check the forecast and local fire danger information from the National Weather Service and your state or county officials, and ask your fire department whether any local restrictions or advice apply.

On high-risk days, clean more often, keep a water source and a second person or phone contact available, and plan where you will park each machine for the night. If conditions seem too risky to work, it is acceptable to wait. A day lost to caution costs far less than a machine and a field.

• Check the forecast before you start
• Adjust cleaning frequency for dry spells

Last reviewed: November 12, 2026. Written by the Farm Safety Editorial Team. See our editorial policy.