This document is provided as general guidance only and does not constitute legal, safety, or compliance advice. See the Important Notice at the end of this document.

This document provides guidance on pre-use and end-use checks for petrol and battery mowers used in grounds maintenance, sports turf, estates and local authority work, covering both pedestrian machines and ride-ons. It covers equipment checks, operator safety considerations, and vibration obligations, and it is the one guide in this library where both halves of the Control of Vibration at Work Regulations 2005 apply to a single equipment type: pedestrian mowers expose the hands and arms, while ride-ons expose the whole body through the seat.

For consistency, this document uses mower to refer to each individual machine, distinguishing pedestrian and ride-on checks where they differ. Checks described here are visual and operational only and do not replace inspection, blade sharpening and balancing, or servicing by a competent person. Where a defect involves the blades, operator presence controls, interlocks, brakes, or any safety-critical component, the mower should be assessed by a competent person before it is returned to service. If there is any doubt about a mower's safety at any point during a check, take it out of service until that assessment has happened. This guidance should be used alongside your organisation's site-specific risk assessments and safe working procedures. It does not cover cutting technique, slope-working procedures, or machine loading and transport operations, which require training and site-specific assessment beyond the scope of an equipment check document.

Vibration: Two Budgets on One Machine Type

Pedestrian mowers are hand-arm vibration sources: declared magnitudes commonly sit between 2.5 and 5 m/s² at the handles, and mowing is sustained work, so trigger time accumulates steadily through a shift. Condition moves the number sharply, and on a mower the usual culprit is the blade: a blade that has struck something and bent, even slightly, unbalances the whole cutting system and can transform a smooth machine into one that hammers the operator's hands.

Ride-on mowers are whole-body vibration sources: exposure enters through the seat, driven less by the machine than by speed over the ground beneath it, and by the condition and adjustment of the seat itself. The whole-body vibration guide covers the WBV values, health picture and controls in full; the checks below cover the machine's contribution.

Hand-Arm Vibration (Pedestrian)

EAV: 2.5 m/s² daily, at which employers should act to reduce exposure and introduce health surveillance
ELV: 5 m/s² daily, which should not be exceeded; exceeding it is a breach of the Regulations
Operators should be informed of the risks, and exposure is cumulative across every tool used that day

Whole-Body Vibration (Ride-On)

EAV: 0.5 m/s² daily, above which a formal programme of control measures is required
ELV: 1.15 m/s² daily, which should not be exceeded
Seat adjustment, tyre pressures, speed and route are the operator-controllable factors, covered in the checks below

Tracking vibration exposure with Toolminder. Toolminder tracks hand-arm and whole-body vibration as separate daily budgets in real time as each mower is used, calculating cumulative exposure against the relevant thresholds and flagging with amber and red indicators when limits are approached or exceeded. Reliable calculations depend on accurate, real-world vibration data for each mower. See the note below.

Vibration data: do not rely on manufacturer figures. The HSE advise that manufacturer quoted vibration values are typically measured under controlled conditions and are often not representative of real-world use. A mower's true magnitude also changes with blade condition and balance, and a ride-on's seat condition changes what reaches the operator. For accurate exposure calculations, vibration testing should be carried out on the actual machines in use. Earlsmere offer vibration testing for grounds equipment, including ride-on machines. Contact Earlsmere for further information.

Pre-Use Check

A pre-use check should be completed each time a mower is brought into use. Where vibration exposure is tracked in Toolminder, the pre-use check is presented automatically before timing begins, so it is completed as part of starting work with the mower. Checks are typically completed in 2-3 minutes where no issues are found.

Operator training and authorisation. Everyone who uses a mower at work must have received adequate information, instruction and training under PUWER, and ride-on operation in particular should be limited to operators trained for it, with formal certificates of competence widely available and often required by local authority and sports venue contracts, especially for slope work. Organisations should maintain records of training and authorisation, and only trained, authorised operators should complete these checks and use this equipment.

PPE Requirements

Eye protection: safety glasses to EN 166: rotary mowers eject debris at high speed, and strimming and blowing usually share the same working day
Hearing protection: petrol mowers operate at levels where hearing protection is required under the Control of Noise at Work Regulations 2005, and daily noise exposure is cumulative across all equipment used. The noise Regulations guide covers the thresholds
Footwear: sturdy safety footwear with good grip. Feet work close to a pedestrian mower's deck, and slopes and wet grass are this equipment's natural habitat; open or soft footwear has no place near a running mower
High-visibility clothing: to EN ISO 20471 where work is on verges, near roads, or around moving plant and vehicles, in line with your organisation's site rules and risk assessment
Gloves: sturdy work gloves for handling and for blade work with the machine isolated. Anti-vibration gloves should not be relied upon as a control measure for HAV exposure: the HSE advise that their effectiveness against the vibration frequencies produced by this category of equipment is limited. Warm, dry hands are, however, genuinely less vulnerable to vibration injury

Do not use a mower with a safety-critical defect. Any mower with a damaged, cracked, or bent blade, a loose blade fixing, an operator presence control that does not stop the blade or engine when released, a missing guard or deflector, defective brakes or interlocks on a ride-on, or any fault that could affect operator safety or increase vibration output should be taken out of service and assessed by a competent person before further use.

Isolation Before Hands-On Checks

Mowers cause a disproportionate share of serious hand and foot injuries, and almost all of them happen at a machine someone believed was safe. Before any manual inspection, blade work, unblocking, or under-deck access, the mower must be made incapable of running, and the blade confirmed stationary.

On petrol mowers, the engine stopped and the spark plug lead disconnected before any work under the deck, on the blade, or clearing a blockage. Blades can continue turning briefly after the engine stops, and on some machines turning the blade by hand can turn the engine over: the plug lead is what makes that safe
On battery mowers, the battery physically removed and any isolation key withdrawn before any inspection, cleaning, or blade work: a bumped switch on a live machine is all it takes
On ride-ons, the machine parked on level ground, blades disengaged, parking brake applied, engine stopped, and the key removed before the operator leaves the seat for any reason involving the cutting deck. The seat switch is an interlock, not an isolation
Never clear a blocked chute or deck by hand or foot on any machine that has not been isolated as above, however brief the blockage looks. Use a tool to clear debris even on an isolated machine: a stalled blade can be under spring tension against the obstruction
Gloves worn when handling blades: a mower blade injures with the machine completely stationary
Mowers taken out of service due to a safety-critical defect should be tagged or labelled clearly to prevent use by another operator, and physically separated from serviceable machines where possible, with a service job raised in Toolminder so the fault is formally recorded and tracked

Blades, Deck & Discharge

Blade sharp, straight, and free of cracks, chips, or bends, checked only with the machine isolated as above. A bent or unbalanced blade is both a vibration problem and a warning that the blade, its boss, and possibly the crankshaft took an impact
Blade fixing bolt secure at the handbook torque, with the blade boss and any friction washers undamaged
On cylinder mowers, the cylinder and bottom blade undamaged, with the cut adjusted per the handbook and the cylinder turning freely when isolated
Cutting deck free of packed clippings above and below, and free of cracks, particularly around the blade spindle and mounting points
Discharge chute, deflector, and grass box or collector fitted, undamaged, and secure: these are guards against ejected debris, not accessories
Height adjusters and rollers moving freely and set evenly

Guards, Controls & Operator Presence

Operator presence control tested every time: releasing the bail or lever must stop the blade, and on machines without a blade brake clutch, the engine, promptly and reliably. A slow or partial stop is a safety-critical defect
Operator presence controls must never be defeated. A bail cable-tied, taped, or wedged down converts the machine's main safeguard into decoration, and it is the single most common dangerous modification found on site. A defeated OPC found on any machine should be treated as a serious matter, not a shortcut
On machines with a blade brake clutch, the blade stopping within its normal time when disengaged while the engine continues running
Drive engagement and release working cleanly on self-propelled machines, with the machine stopping when drive is released
Throttle and stop control functioning, and all guards, covers, and fasteners present and secure

Ride-On: Interlocks, Brakes & Seat

Seat switch tested per the handbook: leaving the seat with blades engaged should stop the blades or engine
Reverse interlock, where fitted, functioning: blades should not run in reverse unless the override is deliberately operated in line with your organisation's rules
Brakes and parking brake holding the machine on the slopes it will work, and steering free of excessive play
Tyres undamaged and at the handbook pressures: pressure affects stability on slopes and the vibration transmitted through the machine
Seat and its suspension in good condition and adjusted for the operator's weight before starting work: a seat set for the wrong weight can amplify whole-body vibration rather than absorb it, and a collapsed or seized seat is a WBV defect, not a comfort issue
Seatbelt worn where a roll-over protective structure is fitted and deployed, per the manufacturer's instructions and your organisation's procedures; slope limits in the handbook are absolute, and the machine is not taken beyond them
PTO or blade engagement operating cleanly, and blades stationary whenever disengaged

Power, Fuel & Lubrication

Engine oil level checked on four-stroke engines before starting: most mowers, unlike most hand-held grounds equipment, are four-stroke and take straight petrol and separate engine oil. Fuelling a four-stroke with two-stroke mix, or worse, diesel, is a genuine and expensive site error, so fuel containers should be clearly labelled
Fuel fresh and correct per the handbook, with no fuel or oil leaks, caps secure, and the air filter clean and seated
Exhaust and its heat shield secure and undamaged: mower silencers run hot enough to burn skin and to ignite dry clippings the machine is parked over. Refuelling with the engine off and cooled, away from ignition sources, moving the mower away from the refuelling point before starting
On battery mowers, the battery charged and correctly latched, with the casing free of cracks, swelling, or signs of water ingress and the terminals clean; spares stored per the manufacturer's guidance

Starting & Operational Check

Mower started per the handbook with feet clear of the deck and the machine on firm, clear ground
Starts cleanly, runs smoothly, and responds to controls without hesitation
No abnormal vibration at the handles or through the seat: on a mower, new vibration almost always means the blade, and it stops work until the blade has been inspected on an isolated machine
Any failed task should prompt a reason for failure and supporting photos. Raise a service job immediately within the app
Use the observations field to note early signs of wear, unusual vibration, or running issues

Work Area & Slopes

Area walked before mowing: stones, wire, litter, and hidden objects become projectiles, and striking them bends blades
Bystanders kept clear of the discharge side, and mowing paused when people or vehicles pass close, particularly on verges and in parks
Slopes worked within the handbook's limits and your organisation's procedures: as general practice, pedestrian mowers work across slopes so the machine cannot run onto the operator, and ride-ons work up and down them, but the handbook and your risk assessment govern, and ground too steep or too wet for the machine is ground for a different method
Wet grass respected: it clogs decks, invites slips, and pairs badly with slopes
Kerbs, edges, and obstacles approached with the discharge directed away from people and property

End-Use Check

An end-use check should be completed each time a mower is finished with and returned to storage. Where exposure is tracked in Toolminder, an end-use check can be configured to run automatically when the mower is stopped, closing the operator's usage record for that session, which is important for accurate vibration exposure tracking.

Cleaning & Condition

Mower isolated before cleaning begins: engine stopped and spark plug lead disconnected on petrol machines, battery removed, and ride-ons parked, braked, blades disengaged, and key out
Deck cleared of packed clippings above and below using a tool, not hands: packed grass holds moisture against the deck, corrodes it, and unbalances the cut
Cooling fins, intakes, and the area around the exhaust cleared of clippings and debris while the machine is cool
Washing done with care around bearings, electrics, and battery components per the handbook

Wear & Damage Review

Blade condition reviewed honestly for the next user, especially after any strike during the session: a strike is recorded, and the blade, boss, and mounting inspected before the machine is stored as serviceable
On ride-ons, seat, tyres, and interlocks re-checked after the day's use, with any change in ride quality noted: rising harshness through the seat is a WBV signal worth investigating, not absorbing
Any new damage, leaks, or running issues recorded with notes and photos, with a service job raised if a fault needs attention before next use

Storage & Transport

Fuel managed per the manufacturer's guidance for the expected storage period; batteries removed and stored per the handbook
Mower stored dry and secure, never hot against combustible material, and out of reach of unauthorised users
Ride-ons loaded and transported only under your organisation's loading procedures, secured against movement, with keys removed
Check saved to the asset history, with operator usage time recorded and visible to supervisors for exposure monitoring

Vibration Exposure: Operator Responsibilities

Operators should be aware of their cumulative daily exposure and should report symptoms promptly: for hand-arm vibration, tingling, numbness, or whitening of the fingers; for whole-body vibration, persistent or worsening back pain. Early reporting matters in both cases, and neither symptom set is an inevitable cost of the trade.

Mowing days are mixed days. The operator who rides a mower all morning and strims all afternoon is drawing on both budgets, hand-arm and whole-body, and each is tracked separately. Pedestrian mowing shares its HAV budget with every other tool used that day, and a blade in good condition is one of the cheapest exposure controls the machine offers.

A blade strike is a vibration event. Striking a hidden object can bend a blade by a few degrees, and a bent blade turns every subsequent minute of mowing into elevated hand-arm vibration exposure while it hammers the machine's bearings. Any strike, and any new vibration at the handles or through the seat, should be reported and the machine inspected on an isolated machine before continued use.

Common Situations

All tasks pass

Mark each task as Pass, add any observations if relevant, and the check is complete. The mower is confirmed in good condition and ready for use. Plan the session against the operator's remaining daily exposure budget, hand-arm for pedestrian machines, whole-body for ride-ons, before starting work.

Blade strike during mowing

Stop, isolate the machine fully, and inspect the blade, blade boss, and fixing before any further use. A visibly bent, cracked, or chipped blade condemns itself; a blade that looks straight after a hard strike still deserves scrutiny, because small bends show up as vibration before they show up to the eye. Record the strike and the inspection outcome in Toolminder, and raise a service job if anything is in doubt.

Operator presence control fails, or is found defeated

A mower whose blade or engine does not stop when the operator presence control is released is out of service immediately, without exception. A control found tied, taped, or wedged down is treated with equal seriousness and reported, because the next user inherits the danger without knowing it. Tag or physically separate the machine, record the fault in Toolminder, and raise an urgent service job.

Blocked chute or clogged deck mid-session

Isolate first, every time: engine stopped, plug lead off or battery out, and on a ride-on, blades disengaged, brake on, key out, before anything goes near the blockage, and then clear it with a tool rather than a hand. The seconds saved by clearing a chute on a live machine are the most expensive seconds in grounds maintenance. Record repeated clogging in the observations: it is often a deck, blade, or conditions signal worth acting on.

Operator approaching a daily exposure limit

If an operator's cumulative exposure for the day is approaching an action or limit value on either budget, the work should be stopped or handed to another trained operator. Record the session end in Toolminder so the exposure record is accurate. Supervisors can review operator usage across all assets to manage exposure across the team, which matters most on mixed days combining ride-on and hand-held equipment.

Configuring Mowers in Toolminder

Toolminder can be configured with your organisation's mowers as individual assets, each with their own pre-use and end-use check templates covering the checks in this document, with pedestrian and ride-on templates differing where the checks do. Hand-arm and whole-body vibration are tracked as separate real-time budgets, with cumulative daily exposure calculated automatically across every machine used that day. Accurate vibration data for each machine is essential for reliable exposure calculations, and mower magnitudes change meaningfully with blade and seat condition. Earlsmere offer vibration testing for grounds equipment, including ride-on machines. Contact your Toolminder representative to discuss configuration and vibration testing for your fleet.

Important Notice

This document is intended as general guidance only and does not constitute legal, safety, or compliance advice. It does not replace any statutory obligations, manufacturer instructions, or the requirements of relevant legislation including PUWER, the Control of Vibration at Work Regulations 2005, or HSE guidance on hand-arm vibration where applicable. Organisations are responsible for determining appropriate inspection intervals, exposure limits, training requirements, and procedures for their own equipment and circumstances. Earlsmere Limited accepts no liability for any loss or damage arising from reliance on this document.

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