How to Perform a Safe MEWP Pre-Use Check
A mobile elevated work platform (MEWP) gives workers access to height while reducing the need for fixed scaffolding, but it must be inspected before every period of use. A pre-use check identifies defects that could affect stability, movement, platform security, or emergency operation before anyone leaves the ground.
The check applies to equipment such as scissor lifts, boom lifts, vertical lifts, and vehicle-mounted platforms. It should be completed by a trained, authorised operator who understands the specific machine, its controls, and the manufacturer’s instructions. A familiar-looking machine can still have damaged components, depleted batteries, or a fault that developed during transport or the previous shift.
A pre-use inspection is separate from planned maintenance and the formal examination required under UK health and safety arrangements. It does not replace servicing, repairs, or the thorough examination schedule. Instead, it provides a practical final barrier between an unsafe machine and the person operating it.
Confirm The Machine And Work Area
Start by checking that the correct MEWP has been selected for the task. Confirm its rated capacity, maximum working height, outreach, terrain limitations, and permitted number of occupants. A platform that is suitable for indoor flooring may be unsafe on uneven ground, while a boom lift may need more clearance from structures and overhead services than a scissor lift.
Review the operator manual and any site-specific risk assessment before approaching the controls. Look for restrictions on wind speed, gradients, ground bearing pressure, use of stabilisers, and movement with the platform raised. Check that the machine’s identification plate and warning labels are present and readable.
The surrounding area needs its own inspection. Identify holes, soft ground, slopes, trenches, loose materials, traffic routes, pedestrians, and obstructions. Establish a safe exclusion zone where necessary. Give particular attention to overhead power lines and other electrical conductors; maintain the legally required clearance and follow the site’s control measures rather than relying on visual judgement alone.
Inspect The Chassis And Access Equipment
Walk around the MEWP before starting it. Look for fresh oil, hydraulic fluid, fuel, coolant, or battery leakage beneath the machine and around hoses, cylinders, pumps, and connections. A small leak can become a loss of pressure or a slip hazard, so it should be reported instead of being wiped away and ignored.
Examine tyres, wheels, axles, and outriggers. Check for cuts, bulges, exposed cords, damaged rims, missing wheel nuts, or signs that a solid tyre has separated. On machines fitted with stabilisers or levelling jacks, inspect the pads, pins, locking devices, hoses, and visible structural members. Confirm that each component is secure and free from distortion.
Inspect the steps, access gates, handrails, toe boards, and platform floor. The entrance gate should close and latch correctly, with no bent hinges or missing retaining parts. The floor must be clean enough to prevent slips and free from unauthorised items that could create a trip or falling-object hazard.
Check the boom, scissor arms, turntable, guardrails, and welds for cracks, impact damage, corrosion, or unusual movement. Do not place hands near moving joints during the inspection. A defect in a load-bearing or guarding component requires the machine to be taken out of service until a competent person has assessed it.
Check Controls, Power And Safety Devices
After the visual inspection, use the machine’s start-up procedure. Check the battery charge or fuel level, engine fluids where applicable, and any warning lights or diagnostic messages. Examine cables, plugs, isolation switches, emergency stop buttons, and control boxes for damage. On electrically powered equipment, do not use a cable or connector with exposed conductors, crushed insulation, or signs of overheating.
Test the controls from the designated ground position and platform position. Verify that forward, reverse, steering, lifting, lowering, slewing, telescoping, and platform rotation operate smoothly and in the correct direction. Use slow movements in a clear area, keeping people away from the machine and stopping immediately if a control sticks, responds late, or produces an unexpected movement.
Safety devices must be tested according to the manufacturer’s procedure. These can include interlocks, tilt alarms, load-sensing systems, speed limitation, pothole protection, drive cut-outs, and stabiliser interlocks. Never bypass an alarm or defeat a guard to keep working. Such actions can remove a critical layer of protection and may create a serious risk of overturning or crushing.
Emergency lowering and ground-control functions deserve special attention. The operator and a nominated person on the ground should know how to lower the platform if the main controls fail or the operator becomes unwell. Where a harness is required in a boom-type MEWP, inspect the harness, lanyard, attachment point, and rescue arrangements; rescue harness guidance can help reinforce the wider planning needed for work at height.
Match The Check To The MEWP Type
Different machines present different hazards, so a generic walk-around is not enough. A scissor lift requires close attention to platform extension mechanisms, pothole protection, levelling systems, and the condition of the scissor pack. A boom lift requires careful inspection of articulation points, telescopic sections, slew systems, basket attachment, and the possible risk of entrapment against nearby structures.
Vehicle-mounted platforms also need checks on the carrier vehicle, parking brake, wheel chocks where required, stabiliser deployment, and the connection between the platform and vehicle. Confirm that the vehicle is positioned on suitable ground and that the stabilisers have reached the correct operating position before raising the platform.
The following comparison highlights areas that deserve extra attention. It is still essential to follow the machine’s own instructions because models vary in design and safety systems.
| MEWP type | Important pre-use focus | Typical operating concern |
|---|---|---|
| Scissor lift | Scissor arms, guardrails, pothole protection, platform extension, tilt alarm | Overturning on slopes, weak ground, or excessive loading |
| Articulated boom | Boom sections, pins, hoses, basket controls, slew area, emergency lowering | Entrapment, crushing, outreach limits, overhead obstructions |
| Telescopic boom | Telescopic sections, chain or cable systems, load chart, forks or attachments | Reduced stability at maximum outreach or load |
| Vertical lift | Mast, guide rollers, gate, platform controls, emergency descent | Restricted access, uneven ground, and limited escape options |
| Vehicle-mounted platform | Vehicle condition, stabilisers, chocks, isolation controls, platform connection | Movement, inadequate set-up, and poor ground bearing |
Carry Out A Controlled Functional Test
Once the static inspection is complete, position the MEWP in a clear test area. Keep the platform lowered and travel at the lowest practical speed. Test the brakes, steering, drive direction, and warning alarms before attempting to elevate. Listen for unusual grinding, knocking, squealing, or hydraulic noise, and watch for jerky movement or drifting.
Raise the platform only when the initial functions have worked correctly. Test the lift and lower controls through a limited range, then check the machine’s response to steering, slewing, articulation, and telescoping as applicable. Keep the test within the manufacturer’s stated limits and stop if the machine behaves differently from normal.
Observe how the platform stops and whether the controls return to neutral. Check that the emergency stop cuts movement as intended, then reset it using the correct procedure. Test emergency lowering only as specified; some systems are intended for rescue use rather than routine operation, and repeated operation may require inspection or reset.
Never conduct a functional test beneath an elevated platform unless the machine has been properly supported and the procedure specifically permits it. Do not climb onto guardrails, lean outside the platform, or use ladders, boxes, or other objects to gain extra height. These practices alter the machine’s stability and fall-protection arrangements.
Record Defects And Make The Decision
The person carrying out the check should record the date, machine identification, hours or mileage where applicable, operator name, findings, and action taken. A paper checklist, digital inspection system, or site log can be used, provided the information is legible and accessible to those responsible for the equipment.
If a defect affects safe operation, isolate the machine immediately. Lower the platform if it can be done safely, switch off the equipment, remove the key, and attach a clear “do not use” notice. Report the issue through the site’s defect process and ensure that an authorised technician or other competent person assesses and repairs it.
Minor cosmetic damage does not automatically make a MEWP unsafe, but the operator should not decide that a structural, hydraulic, electrical, or safety-system defect is acceptable without appropriate guidance. A recurring fault may indicate that maintenance or a formal examination is overdue. The machine should return to service only when the defect has been addressed and the responsible person has released it for use.
Before work begins, confirm that the operator has suitable training for the category of MEWP and understands the rescue plan, communication method, weather limits, and exclusion controls. A pre-use check is effective when it leads to a clear decision: use the machine, obtain further advice, or remove it from service.
Practical Habits That Strengthen Every Inspection
Build the check into the start of every shift, not just the first day a machine arrives on site. Repeat it after the MEWP has been moved between work areas, involved in an impact, exposed to severe weather, or used by another team. A short, consistent inspection is easier to maintain than an informal assumption that the previous operator found everything.
Use these habits to make the process reliable:
- Follow the manufacturer’s checklist and inspect from the ground upwards before starting the engine or drive system.
- Keep a safe distance from moving parts, overhead services, edges, and other vehicles during functional tests.
- Treat any leak, alarm, damaged guardrail, control fault, or unusual movement as a reason to stop and report.
- Make sure emergency lowering, rescue arrangements, and ground-level communication are understood before elevation.
- Record the check and verify that isolation, repair, and release procedures are completed before reuse.
Training in a realistic process-plant environment can help operators connect the checklist with the risks around live equipment, restricted access, vehicle movements, and emergency response. Practical instruction should cover the specific MEWP categories used at work, alongside wider site safety responsibilities.
A sound inspection also supports supervisors and employers. It creates evidence that equipment is being managed systematically, helps identify repeated defects, and gives workers confidence that concerns will be acted upon. The record is valuable only when it reflects an honest check rather than a box-ticking exercise.
Use this procedure as part of a wider MEWP management system that includes operator training, planned maintenance, thorough examination, task planning, and rescue preparation. At HCF CATCH, employers and trainees can develop practical industrial skills in a realistic live-process-plant setting, with training that connects safe equipment use to the demands of working environments across the Humber region and beyond. Arrange suitable practical training or discuss your organisation’s requirements with the centre before the next platform operation.