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Forage Harvester and Silo Safety

Silage season combines heavy machinery, long hours and stored crops that can release gas. This guide describes the main hazards in general terms and points to official sources.

Why is silage season risky?

Harvest compresses a lot of work into a short window. Machinery runs for long hours, drivers are tired, weather forces quick decisions and extra helpers may be new to the equipment. Every one of those factors raises risk.

Planning ahead for how the work will be staffed, who is trained and when to stop for rest makes a real difference. Write the plan down and share it.

Make a pre-season checklist for each machine, covering guards, shields, lights, brakes and safety devices.

• Long hours and tired drivers
• New or temporary helpers
• Weather pressure

What are the main machinery hazards?

Forage harvesters have powerful moving parts, feed rollers and cutting mechanisms. Clogs and jams are tempting moments to reach in, but equipment can still move or release stored energy after the engine is off.

Follow the operator's manual for clearing blockages. Never improvise. Shutting down and securing the machine, and waiting for all motion to stop, belongs to the manufacturer's instructions.

A blocked feed roller may still hold stored energy, and the cutterhead can keep turning after the engine stops. Allow the machine to come to a complete stop and secure it before doing anything. Keep guards and shields in place at all times. A missing guard is a hazard, and replacing it before work starts is part of preparing the machine.

• Stop the engine and secure the machine
• Wait for all motion to stop
• Follow the manual for clearing jams

What about trucks, wagons and traffic?

Many people and vehicles move around the field, the road and the silo at the same time. Backing accidents, rollovers and collisions occur where visibility is poor or drivers are rushed.

Agree on who goes where, keep bystanders and children away from equipment and use clear communication such as radios or established signals. Road travel with slow-moving equipment should follow your state's rules.

Tell neighbors and road users that you will be moving equipment, and use lights and signs as required by your state's rules.

• Keep bystanders and kids away
• Agree on signals or radio communication
• Plan routes and parking before harvest

How do silo hazards fit in?

Filling a tower silo or packing a bunker introduces gas, collapse and fall hazards. Silage that is freshly stored may produce gases for a period, and the area around the silo needs attention.

See the related guides on silo gas, silo entry and bunker silos on this site, and rely on extension and OSHA for specifics.

Nothing here replaces training on a specific machine. Ask the dealer to walk new operators through it.

• See the silo gas guide
• See the silo entry guide
• See the bunker silo guide

How should crews be prepared?

Everyone should know their job, know the shutoff procedures and know where to find help. New helpers should be trained before they are put on equipment, and young workers should not be given tasks beyond what the law allows.

Confirm rules for young workers with the U.S. Department of Labor, since they differ based on the job and the worker's age and on state laws.

Check that helpers understand the limits set by labor law. Rules about young workers and hazardous jobs are detailed.

• Train helpers before they work on machines
• Give clear, simple instructions
• Confirm youth rules with the U.S. Department of Labor

How do you manage fatigue?

Tired people make mistakes. Plan shifts and breaks, keep water and food available and give people permission to stop when they are worn out. A late-night rush to beat the weather is a common time for injuries.

If the weather forecast is driving the schedule, check the National Weather Service for official information and plan with realistic timing.

Eat, drink and rest. Mistakes tied to fatigue are among the most preventable.

• Build breaks into the schedule
• Provide food and water
• Let people stop when they are exhausted

Where can you learn more?

OSHA, NIOSH and extension programs offer harvest safety resources. Your equipment manufacturer's manual is the authority on your machine. Local fire and rescue services may help with training.

If a person is caught in equipment or collapses near a silo, call 911 and do not enter the hazard area to attempt a rescue.

Plan for a quick call to 911 by knowing the field location and giving clear road directions.

• Operator manuals
• OSHA and NIOSH
• Extension harvest safety programs

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