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Baler Safety and Jam Clearing

Balers are powerful machines with many moving parts, and jams are common. The temptation to clear one quickly is exactly when people get hurt.

Why are balers hazardous?

Balers draw in crop material with moving parts such as pickups, feeders, rollers, plungers and knives. Some store energy in springs or hydraulic systems that can release unexpectedly. Round and square balers differ, so rely on the manual for yours.

Jams happen. The hazard is not the jam itself but the urge to fix it while the machine is still powered or still holding stored energy.

Square balers and round balers, and various pickup designs, all create different hazards. Read the section of the manual that matches yours, not a general guide.

What is the safe approach to a jam?

General principles come from OSHA, NIOSH and manufacturers: stop the machine, disengage power, shut off the engine, remove the key and wait for all motion to stop. Release or secure stored energy exactly as the manual says. Only then should anyone approach the jam.

Specific steps differ by model, so keep the manual in the tractor cab and review the jam-clearing section before the season begins.

Plan ahead for where you will stop. Park on firm, level ground away from the line of travel of other machines, and chock if the manual recommends it. Write the steps for your model on a card and keep it in the tractor, so the process is clear even when you are tired or rushed.

• Stop and disengage power
• Shut off engine and remove key
• Wait for all motion to stop
• Follow the manual for stored energy
• Keep others away while you work

Why is the power take-off a concern?

The power take-off shaft turns quickly and can wrap clothing or hair in an instant. Shields must be in place and in good condition. Never step over a turning shaft, and do not wear loose clothing near it.

If a shield is damaged, replace it before using the baler. Replacement parts are available from dealers.

Check the shaft shield for cracks and wear. A turning shaft with a missing or damaged shield can catch loose clothing before you can react.

What about hot work areas and fire?

Dry material, dust and friction can lead to fires in balers and nearby equipment. Keep bearings maintained, clear buildup and keep a fire extinguisher where you can reach it safely.

If a fire begins, call 911 and move away. Do not put yourself in danger to save the machine.

Look under the baler and around the bearings at the end of each day. Residue that has built up is both a fire hazard and a sign that maintenance is overdue.

How do you keep bystanders safe?

Keep children, visitors and workers away from baling operations. Large bales are heavy and can roll or fall. Set a rule that nobody stands near a bale that is being dropped or stacked.

Be careful when working on slopes, where bales and machines can roll. Chock equipment as needed.

Remind everyone that the area around a baler is not a play area. Never allow riders on the baler or the tractor.

What training helps?

Show every operator how to clear a jam on your specific baler, step by step, with the machine off and secured. Watch them practice. Review the process at the start of each hay season and after any near miss.

Seasonal and young workers should never be left alone with a baler until they are trained and approved for that work. Check labor rules with the U.S. Department of Labor.

Teach the whole crew that nobody works on a jam alone while the machine is running. A second person should confirm the tractor is off and the key is out.

Where can you get official information?

Read the operator manual, then use OSHA's agriculture page, NIOSH's agriculture program and extension offices. Dealers and manufacturers can answer questions about your model. If someone is caught in a baler, call 911 and do not attempt an improvised rescue.

Talk with neighbors and local operators. Sharing what has worked helps everyone, and local dealers often know the quirks of particular models.

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