Work equipment guide

What to check before modified work equipment returns to use

Do not treat every change to work equipment as either “just a repair” or automatically a new machine. Record what changed, compare the equipment with its previous safe configuration and intended use, assess new hazards, and get the inspection, test or thorough examination that the change and the applicable regime require. Keep the equipment from use until competent people have confirmed its safe condition and users have the right instructions.

HSE says refurbished and modified machinery must be safe in use and meet PUWER and any other applicable requirements. It distinguishes routine servicing and like-for-like replacements from substantial changes, such as an unforeseen change of function or increased performance, which can invalidate the original conformity assessment and marking. HSE also says PUWER inspection is required after exceptional circumstances, including major modifications or substantial changes in use where safety may have been jeopardised. This article is a decision route for the person managing the change, not a technical sign-off, and a general web page cannot authorise a modified asset to return to service. HSE: refurbished and modified machinery; HSE: inspection of work equipment.

Start with a precise description of the change

“Machine modified” is too vague. Was a worn guard replaced with an essentially identical part, or was a motor changed to one with greater output? Was a control system rewired, or a machine moved to a different site and reinstalled? Was a lifting attachment changed, a capacity increased, an interlock bypassed, software updated or an operating speed altered? The scope determines which safety questions to ask. Record the asset ID, the original function and configuration, the proposed or completed change, the reason, parts and software versions, supplier, installer, date and the drawings or instructions used. Separate changes planned and approved before work from deviations discovered during work, and ask whether the change affects load, speed, reach, stability, guarding, access, emergency stop, stopping time, visibility, fumes, noise or maintenance access. Do not assume a new part that physically fits is equivalent to the original design.

HSE’s modified-machinery page gives useful examples. Repainting, servicing, routine maintenance, changing motors and replacing parts with essentially identical new ones do not necessarily amount to substantial change, yet a change of function or increased performance not foreseen by the manufacturer may be substantial. These examples are not a licence to classify every motor replacement as routine, because the actual effect on performance and safety matters. HSE: refurbished and modified machinery.

Build a before-and-after record

Show the original safe-use limits and the new intended limits side by side. What was the previous maximum load, speed, reach, material, duty cycle or operating environment, and what will be different? Which original safeguards remain valid, and which manufacturer instructions, inspection plans or training materials need change? If these facts are unknown, pause the release decision and obtain the missing technical information. A photograph and work order may help, but a technical drawing, circuit diagram, software configuration or competent test record may be needed for a safety-significant change. The record should let a future maintainer or examiner understand what configuration is in service. If an original declaration of conformity or examination report applies only to the former configuration, keep it for history but do not present it alone as proof of the modified state.

Decide which legal and technical routes apply

The employer’s PUWER duties continue, so the equipment must be suitable for use, maintained safely and inspected when the regulations require it. A modification may also engage LOLER for lifting equipment, electrical safety duties, pressure-system requirements, DSEAR or other regimes. Product supply and conformity law may apply where a change is substantial enough that the modified item is treated as new for those purposes. Ask a competent specialist to determine each applicable route rather than assuming one certificate covers all of them. HSE says machinery modifications that are substantial and not foreseen or agreed by the manufacturer can invalidate the original conformity assessment and marking, requiring renewed assessment and marking, while not every refurbishment or replacement does this. This legal boundary is specialist work, so do not decide it from a generic checklist alone. HSE: refurbished and modified machinery.

For lifting equipment, HSE says thorough examination is required in several circumstances, including before first use where relevant, after installation or assembly where safety depends on it, and at intervals for deterioration. Its FAQs discuss examination after significant changes to a lift and after exceptional circumstances. The competent person should determine whether the particular modification requires a new examination before use. HSE: LOLER overview; HSE: equipment FAQs.

Separate maintenance, inspection, testing and thorough examination

Replacing a component is maintenance or repair. Checking the installed condition may be an inspection. Testing a protective function may be part of verification. A LOLER thorough examination is a specific competent assessment under that regime, and product conformity work concerns design and supply obligations. These activities can all be necessary on one project, but they answer different questions. A completed maintenance job card should not be renamed a thorough-examination report, and a conformity document does not show that an item was installed correctly at the new site. HSE says PUWER regulation 6 requires inspection after installation when safety depends on installation conditions, at suitable intervals for deterioration, and after exceptional circumstances such as major modifications, known or suspected serious damage, or substantial changes in use that may jeopardise safety. HSE: inspection of work equipment.

Do not order unnecessary proof-load tests or destructive checks as a generic response. HSE says routine testing is not needed for most lifting equipment as part of thorough examination, and some overload tests may cause damage, so the competent person should determine the need and nature of testing. The evidence should match the actual risk and technical standard. HSE: lifting-equipment examinations.

Example: a replacement guard of the same design

A worn machine guard is replaced with an essentially identical manufacturer-approved component. The technician confirms correct fit and operation, checks that the guard and interlock function as intended, records the repair and releases the machine under the site’s procedure. The change may not be a substantial machinery modification merely because a new guard was fitted, yet a current unsafe condition still requires correction and verification. If the replacement is a different design or alters access, the review becomes broader.

Example: a faster conveyor drive

A site proposes a higher-power drive to increase conveyor speed. This could change stopping time, guarding distances, emergency-stop performance, loading and maintenance hazards, and it may be a substantial change of performance. The project team should involve the manufacturer or competent machinery specialists before installation, assess whether original conformity remains valid, update risk controls and instructions, and specify inspection and tests before use. The example shows why a motor change cannot be classified by the part name alone.

Control the change before the equipment is altered

Define who can approve the scope, who supplies parts and design information, who performs the work and who signs off each stage. Keep the equipment isolated or otherwise unavailable under the site’s safe-work procedure while the change is made. If a contractor discovers a different fault or proposes an alternative part, require review before installation, because a late substitution can affect the safety case even if it keeps the repair on schedule. Coordinate with production and other contractors, since the change may affect upstream and downstream equipment, access routes, extraction, guarding or operator positions. A new interlock may change the startup sequence, and a larger lift attachment may change clearance and the load chart, so the risk assessment should consider the whole system, including foreseeable use and maintenance. HSE’s PUWER overview states that equipment must be suitable for its intended use and maintained in a safe condition. HSE: PUWER overview.

Verify the finished configuration

Before release, obtain evidence matched to the agreed change: an installer or technician completion record, as-built drawings or settings where relevant, inspection and functional-test reports, any required thorough examination, updated conformity documents if applicable, manufacturer advice and revised operating or maintenance instructions. Confirm the reports refer to the right asset, location and configuration, and read defects, exclusions and conditions, not just a “pass” box. The verification should reproduce the conditions that matter without exposing people to unnecessary risk. A safety guard that works with the machine idle but fails at operating speed has not been adequately checked, and a lifting item that passes a routine visual check after a structural change may need a competent thorough examination. Record the decision in two parts: the technical specialist confirms the scope tested and the result, and the employer or site controller accepts the equipment for a defined use under its workplace procedures. These roles should not be conflated.

An evidence map for the release decision

Use columns for the change, the hazard affected, the verification needed, the responsible competent person, the report reference, the result, any residual restriction and the user briefing. For example: “new guard and interlock wiring; access to cutting blade; functional check and stopping performance assessed; engineer report 18; passed within stated configuration; only trained operators; revised instruction issued.” The exact test details belong to the specialist, and the map helps ensure the decision has not lost an interface.

Update inspections, maintenance and training

A modification can change what deteriorates, how fast and what operators must check. Review maintenance frequency and tasks, pre-use checks, formal inspection scope, spare parts and any statutory examination scheme with competent people. HSE says inspection frequencies should consider manufacturer recommendations, industry advice, conditions and experience, so do not carry forward an old schedule automatically if the equipment now works faster, outdoors or with a different load. Update risk assessments, method statements, operating instructions, signs and training where the change affects use, brief all shifts and contractors who may operate or maintain the item, and remove obsolete instructions and drawings from the point of use while retaining controlled history. If the modified equipment moves between sites, make sure its current configuration and reports travel with it. HSE: inspection of work equipment.

Treat uncertainty as an open safety question

Sometimes the project cannot immediately determine whether a change is substantial, whether a certificate remains valid or which test is needed. Record the question, stop use where safety cannot be established, and obtain manufacturer or specialist advice. Do not resolve uncertainty by choosing the least demanding label. Escalate when the change involves safety-critical control software, load-bearing structure, speed, capacity, braking, guarding, pressure containment or other features whose failure could seriously harm people. An ordinary maintenance team may be competent to replace parts but not to re-engineer the safety function, and contracting out the modification does not remove the employer’s need to understand the resulting safe-use conditions. If an examiner identifies a dangerous defect, follow the applicable reporting and out-of-use process rather than deferring it.

Worked scenario: moving and altering a lifting installation

A warehouse relocates a fixed lifting arrangement and changes the support structure. The project team records the original load and installation details, obtains a competent design review of the new support and installation, and determines the examination needed under LOLER before use. The examiner’s report is linked to the new location and configuration, operators receive the revised safe working information and the maintenance plan is updated. The manager does not rely on last year’s periodic report from the old installation as the sole evidence for the new one. HSE says lifting equipment whose safety depends on installation or reassembly may require thorough examination before use. This is a workflow illustration, not a statement that every portable lift must be examined after every move, and the competent person must apply the actual rules and configuration. HSE: LOLER overview; HSE: LOLER approved code of practice, L113, paragraphs 319 to 322.

Common mistakes

Using the old examination report for a changed configuration without confirming whether its scope still applies and whether the modification or reinstallation triggers a new examination.
Calling any repair a substantial modification when HSE distinguishes routine servicing and like-for-like replacement from substantial changes.
Calling an increased-capacity change “just maintenance” when a change of function or performance may affect safety and product conformity and needs specialist review before work.
Using a service invoice as a safety report instead of confirming what was inspected or tested, by whom, against which configuration and with what result.
Ignoring connected equipment when a machine change may alter guards, extraction, controls or maintenance access beyond the component replaced.
Testing technically but not briefing users, so limits and instructions are not updated for all relevant shifts before ordinary use resumes.
Letting the planned inspection date stand without asking a competent person whether the plan remains suitable after the modification.

FAQs

Does every modification require a new UKCA or CE mark?

No blanket answer applies. HSE says a substantial machinery change, such as an unforeseen change of function or increased performance, can invalidate the original conformity assessment and marking, while routine servicing or essentially identical replacement does not necessarily do so. Product law and the actual change need specialist review.

Does replacing a motor require a PUWER inspection?

It depends on what changed and whether safety may have been jeopardised. A like-for-like replacement can be routine maintenance with appropriate verification, while a different motor that changes performance may require broader inspection and possibly conformity review. Apply HSE’s examples and the PUWER inspection triggers to the facts.

Is a functional test the same as a thorough examination?

No. A function test checks specified operation, while a LOLER thorough examination is a competent assessment under that regime. The competent person determines whether tests form part of an examination and whether more verification is needed. Some tests may be unnecessary or harmful if imposed generically.

What does Complys do for a modified-equipment release?

Complys publicly describes asset records, planned maintenance, PUWER and LOLER inspection reminders and document storage. It does not classify substantial changes, perform technical examination or authorise safe release. Competent people decide the technical and legal requirements, and the product holds the records and reminders that support that decision.

Where Complys fits

Complys publicly describes manufacturing asset records, planned maintenance, PUWER and LOLER inspection reminders, and document storage. Those functions can help link the modification record, examination report, revised inspection date and updated instructions to the right asset. The public pages checked do not establish a machinery-conformity assessment engine, automatic classification of substantial changes, technical test capability or automatic safe-use release. Use it as an evidence organiser and reminder system while competent people decide the technical and legal requirements and confirm the safe-use conditions.

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