Portable and Mobile Equipment Toolbox Talk

Portable and mobile equipment can create serious lock out tag out hazards because it moves from place to place and may use different power sources during the day. Skid steers, lifts, compressors, pumps, generators, saws, welders, compactors, carts, and portable panels may have fuel, batteries, cords, hydraulics, air pressure, heat, raised parts, or stored energy that must be controlled before service or repair.

This talk focuses on how crews lock out and control energy on portable and mobile equipment before maintenance, cleaning, adjustment, fueling repairs, attachment changes, troubleshooting, or jam clearing. The crew needs to identify the power source, prevent movement, control stored energy, and make sure no one can start or move the equipment while work is being done.

Why This Matters

• Portable and mobile equipment may be powered by electricity, fuel, batteries, hydraulics, pneumatics, or a combination of sources.
• Equipment can roll, shift, lower, rotate, pressurize, or start unexpectedly if it is not secured.
• Unplugging a tool or shutting off an engine does not always control stored energy.
• Mobile equipment may be restarted by an operator who does not know service work is underway.
• Changing locations can make it harder to track cords, hoses, temporary power, generators, and other energy sources.

Common Hazards

• Servicing mobile equipment with the engine running or the key left in the ignition.
• Working under raised buckets, forks, booms, beds, blades, platforms, or attachments without blocking or support.
• Hydraulic pressure trapped in hoses, cylinders, quick couplers, pumps, or attachments.
• Pneumatic pressure in compressors, air tanks, hoses, tools, valves, or lines.
• Electrical energy from cords, batteries, generators, chargers, inverters, or temporary power feeds.
• Stored heat from engines, exhaust, welders, heaters, pumps, or recently used tools.
• Equipment rolling, sliding, tipping, or being struck by site traffic during repair or inspection.
• A portable generator, pump, compressor, or light tower being moved to a new area and connected to a different power source without updating the lockout plan.

Safety Checklist

Before Work Begins

• Review the equipment manual, site procedure, or equipment-specific lock out tag out steps before starting.
• Identify all energy sources, including fuel, battery, electrical, hydraulic, pneumatic, mechanical, gravity, thermal, and stored energy.
• Park mobile equipment on stable, level ground away from traffic when possible.
• Set brakes, chock wheels, lower attachments, and secure the equipment against movement.
• Shut down the engine or tool using normal controls before isolating energy.
• Remove the key, disconnect the battery, unplug the cord, close fuel valves, or isolate the power source as required.
• Bleed air pressure, relieve hydraulic pressure, discharge stored energy, and let hot parts cool before work starts.
• Block, pin, crib, or mechanically support any raised parts, attachments, booms, beds, forks, or platforms.

During Work

• Keep locks, tags, keys, plug covers, battery disconnects, valve lockouts, or other devices in place while work is underway.
• Do not rely only on a removed key if another key, remote, battery feed, or automatic control could start the equipment.
• Verify de-energization by trying the controls only after workers are clear and it is safe to test.
• Stay out from under raised equipment unless it is fully blocked, pinned, or supported.
• Watch for hydraulic pressure, air pressure, fuel, heat, or electrical energy building back up during the task.
• Keep the repair area marked or controlled so operators, drivers, and other trades do not enter or move the equipment.
• Before restart, remove tools and materials, reinstall guards and covers, clear workers, and notify affected crews.

Crew Talking Points

• What portable or mobile equipment will be serviced, adjusted, repaired, or cleaned today?
• What energy sources are present on that equipment?
• How will we prevent the equipment from starting, moving, rolling, lowering, or pressurizing?
• What parts need to be blocked, pinned, lowered, cooled, bled, or supported?
• Who needs to know the equipment is locked out or unavailable?
• Does anyone have a question or concern about power sources, stored energy, traffic, terrain, or equipment movement before work starts?

Stop Work If

• The equipment cannot be parked, secured, chocked, blocked, or protected from movement.
• An energy source has not been identified, isolated, locked, tagged, or controlled.
• Raised parts, booms, buckets, forks, blades, beds, or platforms are not mechanically supported.
• Hydraulic pressure, air pressure, fuel, heat, battery power, or electrical energy remains uncontrolled.
• Operators, drivers, or other trades can access or move the equipment during service.
• The equipment starts, moves, rolls, leaks, sparks, heats up, drops, or builds pressure during verification or restart.

Final Reminder

Portable and mobile equipment still needs full energy control. Secure it, isolate every source, control stored energy, verify it is safe, and do not restart until the crew is clear.