Guides
Technical Guides
Technical knowledge that holds up on site, with its sources stated.
When a breaker stops on site the question is always the same: what caused it, and where do you start? That is what this section is for. Each guide takes one subject and follows it from diagnosis to fix, in the detail someone who knows the machine would give you, and plainly enough to use on site.
About numbers: values such as nitrogen pressure, tightening torque and wear limits change from one model to the next. We do not print a general figure here, because the wrong value damages the machine. The guides show you how the job is done; for the figure that belongs to your model, check your manual or send us the model code and we will look it up.
Editor: Ahmet Akkaya
Faults and diagnosis
Why does breaker nitrogen pressure drop, and how do you tell?
A breaker with low nitrogen pressure strikes weakly, drops in blow rate and runs unusually hot at the back head. Pressure falls for three reasons: seals ageing and leaking, the slow natural loss of gas over time, and damage to the diaphragm or accumulator.
Read →Bushing wear: why replacing the seal alone does not fix it
When a breaker leaks oil, the usual response is a new seal. But the seal is often the symptom, not the cause: once the bushing wears, the tool no longer runs on centre, the seal takes an uneven load and the new seal fails within weeks.
Read →Piston surface damage: the chain that starts with dirty oil
Longitudinal scoring on a breaker piston is almost never a material fault; it is caused by hard particles in the hydraulic oil being crushed between piston and cylinder. The chain begins with dirty oil, continues as scoring, accelerates when the seal is cut, and then feeds itself as the growing leak draws in more dirt.
Read →Tie rod torque: early signs of loosening and the right tightening order
Tie rods clamp the three main body parts of a breaker together and are stretched by every blow. When one loosens, its load shifts to the others, micro-movement begins at the body joints and the chain usually ends in a broken rod.
Read →Hydraulic oil contamination: the invisible cause behind most failures
Scored pistons, sticking valves, short seal life and overheating look like separate failures, but they usually share one root: solid particles, water and air in the hydraulic oil. Dirt normally enters through fittings left open at a tool change, a blocked tank breather, and swarf left inside new hoses.
Read →Reading the sound of a breaker: what each noise is telling you
Most breaker faults can be noticed by ear before any instrument comes out. A healthy breaker produces an evenly spaced, solid, single-body sound.
Read →Run-in after repair: how to work a rebuilt breaker in its first hours
The first working hours of a rebuilt breaker shape the months that follow. Until new bushings, seals and piston surfaces bed in, friction and heat run higher than normal.
Read →Maintenance and checks
How to change a hydraulic breaker seal kit: the work order and common mistakes
A hydraulic breaker seal kit is changed in this order: take the breaker off the machine and clean the outside, release the nitrogen, loosen the tie rods in a cross pattern, separate the body and remove the piston, take out the old seals without scratching the grooves, clean the grooves, compare each new seal with the old one and fit it the right way round, reassemble with clean oil, tighten the tie rods to the manual’s torque in a cross pattern, refit the tool and reconnect the breaker to the machine, charge the nitrogen to the model’s value in the position the manual specifies and put the breaker back to work with a run-in. Tightening torque and nitrogen pressure are model-specific; take them from your breaker’s manual or from HKM.
Read →Installing a hydraulic breaker on an excavator or backhoe loader: auxiliary line, valve and first test
For a hydraulic breaker to work properly on a machine, four things must be in place: an auxiliary hydraulic line suitable for a breaker (the hammer line), a valve and control that open and close it, a return line that sends the oil back to the tank as directly as possible and through a filter, and flow and relief pressure set within the range in the breaker’s manual. Once these are confirmed, the breaker is mounted on its bracket, the hoses are connected according to inlet and return, the shut-off valves are opened, the oil is brought to working temperature and the first blows are struck with the tool pressed on the material.
Read →Pre-shift attachment checks: what to look at, and in what order
A pre-shift check is not a strip-down. It is a short walk-round, done by eye and by hand, before the machine starts work.
Read →Weekly and monthly service: who does what?
The right boundary in attachment maintenance is not frequency but whether the job needs a TOOL. The operator owns everything that can be done by eye and by hand with the attachment still mounted: checking, greasing, cleaning, logging faults.
Read →Maintenance kit or seal kit: what is in each, and when to open which
A seal kit contains only the sealing elements, the seals and O-rings, and it is opened when a breaker leaks oil. A maintenance kit is the full overhaul package: the seal kit plus bushings, thrust ring, bearing parts, the retaining pin and, depending on the model, the diaphragm.
Read →Fitting and removing an attachment: the right order and the usual mistakes
There is one logic to the order when fitting an attachment: mechanical connection first, hydraulic connection second, and on removal the reverse. The reason is safety.
Read →Long standstill and storage: how to put an attachment away
An idle attachment is assumed to be safe from wear, yet standstill has a wear pattern of its own and it is measured in time, not hours. Three things happen: sealing elements dry out and lose their elasticity, grease stiffens in its passages, and moisture condenses inside the housing as temperature swings.
Read →Transporting, stacking and unloading an attachment
A surprising share of attachment damage happens not on site but on the way to it. The cause is nearly always the same: a body with a high centre of gravity and a narrow base, moved without being properly restrained.
Read →Service records: hour meters, logbooks and warranty
A service record does two jobs: getting maintenance done on time, and proving that it was. The second rarely matters until a warranty question arises, and on that day a record cannot be produced retrospectively.
Read →Wet and underwater work: what changes in maintenance
In underwater work the breaker itself does not change, its maintenance regime does. Three things come under strain at once: water tries to enter the housing, grease is washed out of position, and when work stops the moisture left inside starts corrosion.
Read →Hose routing: three habits that finish an attachment hose early
An attachment hose rarely bursts because of pressure. Far more often it is fatigued over months by chafing, stretching or twisting, and it lets go at the worst moment.
Read →How fitting an attachment changes the machine’s service plan
An impact attachment such as a breaker works a machine’s hydraulic system differently from digging. Flow is continuous and one way, pressure pulses, and the heat produced is higher than in bucket work.
Read →Tool choice and life
How to measure a breaker tool and order the right one: diameter, length and type
The quickest way to order the right breaker tool is to give the breaker’s brand, model and serial number; the tool diameter and groove geometry follow from them. If the model is unknown, the tool is measured: shank diameter with a caliper at several points, overall length and the distance from the top face to the retainer groove with a tape measure, and the number, length and width of the retainer grooves with a caliper; the tool type (moil, chisel, blunt, pyramid) and, on a chisel, the direction of the blade relative to the grooves are noted.
Read →How to change a breaker tool
Changing a tool is technically simple but expensive when the order goes wrong. The order is: bring the breaker to a horizontal, supported position, release the pressure, remove the retaining pin and lock, pull the old tool, CLEAN THE SEAT AND THE BUSHING, grease the shank of the new tool, fit it, refit the retaining set and make the first blows off load.
Read →Reading the marks on a tool shank: what the breaker is telling you
The shank of a tool that has come out is the cheapest diagnostic instrument you have for what is happening inside the breaker. A narrow band polished on one side means side load, even polish all round means normal contact, deep longitudinal scores mean dust in the seat and insufficient lubrication, blue or straw colour means overheating, and a deformed pin bed means the retaining set has been running loose.
Read →Repairing and welding a breaker tool: why it does not work
A breaker tool is not welded. The reason is neither cost nor warranty but the material itself: the tool is alloy steel heat treated to give a particular balance of hardness and toughness.
Read →Drum cutter picks and how rotation works
On a drum cutter the real work is not done by the pick itself but by the pick BEING ABLE TO TURN. As long as a conical pick rotates freely in its holder, wear spreads evenly all round and the pick stays sharp; the moment it stops turning it starts wearing on one face, goes blunt, moves from cutting to rubbing, and both it and its holder finish quickly.
Read →Hard rock tools: when they are worth it and when they are waste
Special alloy or extra-hardened tools are better against wear, not against breakage. So the decision comes down to one question: are your tools finishing by wearing, or by breaking? If they wear out and the site is abrasive, a hard rock tool pays for itself.
Read →Tool diameter and breaker match: the hidden cost of the wrong size
Tool diameter has to match the bushing bore of the breaker, and "it went in, so it fits" is not a test. An undersized tool runs with play; it shifts sideways on every blow, eats the bushing and the seal and sends the piston blow off-axis.
Read →Dust channel tools: where they actually pay off
A dust channel tool carries compressed air, or in some cases water, through a bore along the shank to push dust away from the bushing area. On dry, dusty and enclosed sites it visibly extends bushing and seal life.
Read →Tool mushrooming: causes and the limits of dressing
Mushrooming is the striking end of the tool being crushed and spread sideways by the piston. Blank firing is the main cause; a wrong tool-to-breaker match and overheating accelerate it.
Read →Moil, chisel, blunt, pyramid: which tool wins in which material?
Tool choice follows how the material breaks, not how hard it is. A moil point penetrates and cracks from within; the general-purpose answer.
Read →Correct use on site
What the wrong attachment costs you: machine, attachment, and the job
The price of the wrong attachment is paid in three places, but not at the same time. The job shows it first: work slows, fuel goes up, the finished surface suffers.
Read →Down pressure and angle: how a breaker should meet the material
A breaker’s output rests on two simple things: the tool has to meet the material square, and the machine has to press it down enough. Enough means carrying the breaker’s own weight plus a little from the boom; not so much that the machine lifts, not so little that the tool bounces.
Read →Staying too long on one spot: when to move the tool
Carrying on in a spot that will not break is the most understandable and the most expensive reflex on site: if the material resists, hitting it for longer feels like the answer. But if the break does not happen in the first seconds, carrying on does not raise the chance of it happening; it only turns the energy into heat.
Read →Using an attachment as a lever: what lateral load breaks
A breaker tool is made for axial load: it carries energy along its own axis. Levering, dragging and lifting load it at right angles to that axis, and nothing about it was calculated for that direction.
Read →Cold weather start-up and the warm-up round
Running a breaker straight to full load in cold weather takes three risks at once: the oil has thickened and passes narrow galleries with difficulty, the grease has lost its flow and does not reach the bushing, and because nitrogen pressure falls with temperature the breaker behaves differently from expected. The answer to all three is the same and it is simple: a warm-up round.
Read →Dust, mud and water: how the site shortens attachment life
The same model of attachment gives noticeably different life on two different sites, and the difference usually comes from the environment rather than from the use. Three factors decide it: dust abrades, mud traps heat, water washes grease away.
Read →Operating mistakes on shears, grapples and pulverisers
Where a breaker’s mistakes are about the blow, a jaw attachment’s mistakes are about the grip. Shears, grapples and pulverisers share the same weak point: any force applied before the jaw has closed goes into the jaw pin and the blade seat as lateral load.
Read →Operating mistakes on rippers and augers
Rippers and augers work under a different kind of load from breakers and jaw attachments: both enter the material, and while they are inside they are the attachments most sensitive to a change of direction. On a ripper the most expensive mistake is tracking the machine sideways once the tooth is in the ground; on an auger it is trying to free a stuck bit with boom movement.
Read →The exclusion zone around a working attachment
The risks around a working attachment fall into three groups and each travels in a different direction: a flying fragment goes horizontally, falling material goes vertically, and a buried service waits in the direction the attachment is advancing. So no single distance rule covers all three; the zone is set according to the direction of the risk.
Read →Lubrication
Signs of the wrong grease: what the breaker is telling you
The wrong grease shows up not as a fault but as a result: bushings finish earlier than expected, deep scores appear on the tool shank, the grease coming out of the point is thin and clear or, on the contrary, burnt and hardened, and fresh grease blackens and picks up rock dust within hours. All of these have one cause: the contact face of a breaker works under impact and high temperature, and general purpose grease cannot leave a lasting film in those conditions.
Read →Installing an automatic lubrication line: step by step
In an automatic lubrication installation the critical part is not the station but the LINE ROUTE. The station goes somewhere sheltered, the whole line takes a path where it will not be struck or chafed, and the feed connects to the breaker's own lubrication point.
Read →Combining excavator and attachment greasing into one schedule
An excavator and an attachment need greasing at different intervals, but keeping two separate schedules means in practice that one always gets skipped, and it is usually the attachment. The answer is to merge them into one pre-shift list, put the attachment line among the machine lines rather than after them, and give the responsibility to one named person.
Read →Correct greasing technique: tool pressed up, or hanging free?
Grease goes in with the tool pressed upward. With the tool hanging free it drops under its own weight and opens a gap between tool and bushing; grease pumped into that gap escapes straight out instead of spreading through the bushing.
Read →Breaker grease versus general purpose grease
A breaker bushing works under a load found nowhere else on an excavator: dozens of blows a second, high temperature and constant dust. General purpose excavator grease cannot hold its film under that, thins as it heats and is pumped out of the bushing.
Read →When does an automatic lubrication system pay for itself?
Automatic lubrication feeds grease continuously and in measured amounts while the breaker works, so the film between bushing and tool is never interrupted. It pays for itself fastest where the breaker runs long hours and the operator has no chance to get down with a grease gun: quarries, tunnels, continuous demolition.
Read →Attachment choice and use
Which attachment for which job?
Choosing an attachment takes two steps, and on site people usually start with the second. The first step is what the job is: do you want to fragment the material, cut it, crush it, grip it, or take it out of place? The second step is fit to the machine: tonnage, flow, pressure.
Read →Mini excavator attachments: what is possible in confined spaces
A mini excavator works where a large machine cannot go: interior refurbishment, basements, courtyards, narrow streets, barns and greenhouses. The HKM attachment range starts at 0.7-tonne carriers, and in that class breakers, augers, grapples, rippers and small concrete cutters are genuinely usable.
Read →Pulveriser versus shear: the most expensive mix-up
A pulveriser is built to crush concrete away from the rebar: wide jaws, force aimed at crushing. A shear is built to cut metal: narrow blades, force concentrated on a single cutting line.
Read →When is a ripper enough, and when do you switch to a breaker?
A ripper is a passive attachment: it has no hydraulic supply and works by prising material apart with the boom and arm force of the machine. That makes it cheap, simple and maintenance-free.
Read →On which projects does a drum cutter beat a breaker?
A breaker cracks material away; a drum cutter mills it from the surface. In bulk excavation the breaker is faster and leads on most jobs.
Read →Does a crusher bucket really pay for itself?
The value of a crusher bucket builds up not in crushing material but in material never leaving site. If you can size demolition rubble or quarry waste where it lies and use it there, truck movements, haulage charges, tipping fees and the cost of buying backfill all disappear at once.
Read →One machine, many attachments: the quick coupler calculation
The real gain from a quick coupler is not the minutes saved but the attachment changes that start happening at all. Because pinning takes half an hour, operators usually carry on with whatever is fitted and work with the wrong tool.
Read →Oil flow and pressure: reading the catalogue correctly
Once tonnage fits, the second criterion is hydraulic, and it is read from two figures: oil flow (l/min) and operating pressure (bar). Below the range the attachment works slowly and weakly; above it, the excess flow turns into heat, the oil warms and seal life shortens.
Read →Matching attachment to carrier weight: the rule that never changes
Whichever attachment you choose, the first criterion is carrier weight, and it is not open to negotiation. An attachment that is too light for the machine gets crushed by the machine own force and finishes quickly.
Read →Buying and ownership
Used hydraulic breaker: what to check before you buy
Before buying a used hydraulic breaker, check four things: its identity (nameplate, model, serial number and parts availability), the wear visible with the breaker cold (bushing clearance, marks on the tool shank, the front head and pin bores, the tie rods, leak marks), whether it holds pressure (a nitrogen measurement), and how it behaves running on a suitable machine (rhythm, sound, heat, leaks). A cracked body or an undocumented crack repair and an unreadable serial number call for walking away whatever the price; a breaker that does not hold nitrogen, or oil coming out of the charging valve, means it should not be bought without being opened first.
Read →How much does a hydraulic breaker cost? What really drives the price
A hydraulic breaker has no single price, but the items that set it are well defined. The largest is the size class, meaning the weight of the machine it will be mounted on.
Read →Twelve questions to ask before buying an attachment
Most of the questions worth asking when buying an attachment are not about price, because a price difference usually closes inside the first year; the real difference shows up in spare parts availability, service reach and bracket fit. The twelve questions below fall into three groups: does this fit my machine, what happens when it fails, and will I still be able to run it in five years.
Read →The real cost of a cheap attachment: working out cost per hour
Comparing attachments by purchase price is like comparing two beams of different lengths by weight. The right unit is cost per hour, and it has four components: depreciation (price paid less resale value), wear parts, maintenance and downtime.
Read →New or used? What to look at on a second hand attachment
The real risk with a used attachment is not wear but not knowing the wear. An attachment that has worked steadily and been recorded is markedly safer than one with unknown history, and usually worth the difference in price.
Read →Rent or buy?
The choice between renting and buying is usually not a financing question but a question of how intensively the attachment will be used. If it is needed a few times a year for short periods, renting is clear; under regular, long use the rental total approaches the purchase price quickly and leaves you with no asset.
Read →Building an attachment fleet in the right order
An attachment fleet is usually built by need rather than by plan: a job comes up, an attachment is bought for it, then another. The result is brackets that do not match, different tool diameters and a scattered parts stock.
Read →What a warranty covers and what it does not
A warranty is not a promise that the attachment will not break; it is a promise that if a manufacturing or material defect appears, it is the maker’s responsibility. That distinction explains nearly every argument about cover: wear parts sit outside because wearing out is expected behaviour rather than a defect; usage related damage sits outside because its cause is not in manufacture.
Read →The bracket: why an attachment is made for your machine
A bracket is the piece that joins an attachment to a machine, and the reason it is not standard is simple: what it joins to is not standard either. Every machine maker uses a different boom end width, pin diameter and pin spacing, and they differ between weight classes from the same maker too.
Read →Will another brand’s attachment fit my machine?
On site this gets asked as one question, but it is three, and their answers are independent of each other. Mechanical fit is about the bracket and can nearly always be solved, because the bracket is made for the machine anyway.
Read →The first hours after delivery: commissioning and training
The first hours of a new attachment affect its following years out of all proportion. Three jobs are done in those hours: confirming the delivery is complete, running the attachment with the machine at the right settings, and showing the operator what is particular about this attachment.
Read →Attachment basics
What is a hydraulic breaker and how does it work?
A hydraulic breaker is an attachment that turns an excavator’s hydraulic power into repeated blows. Inside it, a piston is driven up by oil pressure, compressed nitrogen in the gas chamber springs that movement back and throws the piston down; the piston strikes the tool shank and the blow passes through the tool into the material.
Read →What is a hydraulic auger and how does it work?
A hydraulic auger is an attachment that turns an excavator’s hydraulic flow into rotation and bores holes in the ground. What a breaker does with impact, an auger does with rotation and axial thrust: the bit cuts the ground, the flighting carries the cut material up and out of the hole.
Read →What is a breaker tool and what are its parts?
A breaker tool is the steel bar that carries the piston’s blow into the material; it is the breaker’s only consumable main part and half the output sits in it. It has three sections and each does a different job: the shank, the upper part the piston strikes and the bushings hold; the retainer groove, the recess the pin or lock sits in; and the working end, the part that enters the material.
Read →What is a hydraulic shear and how does it work?
A hydraulic shear is an attachment that closes its jaw with a cylinder fed from the hydraulic circuit of an excavator and cuts metal by shearing it between two blades. The principle resembles a guillotine: the moving blade passes the fixed blade and the material parts along the cutting line.
Read →What is a concrete cutter and how does it work?
A concrete cutter is an attachment that takes reinforced concrete elements off a structure with two jaws fed from the hydraulic circuit of an excavator. Pointed jaw tips first penetrate the concrete section, then keep closing until the remaining section fails in tension; the industry calls this principle cut and crack.
Read →What is a concrete pulverizer and how does it work?
A pulverizer is an attachment connected to the hydraulic circuit of an excavator that crumbles reinforced concrete by squeezing it between two jaws. Because concrete is brittle, that squeeze cracks it from the inside and breaks it apart, while the rebar inside is stripped clear without snapping.
Read →What is a grapple, how does it work and what types are there?
A grapple is a hydraulic attachment fitted to the stick of an excavator that grips material between opposing jaws and carries it. It does not dig like a bucket: it holds a piece, lifts it, turns it in the air where needed and sets it down under control at a chosen point.
Read →What is a quick coupler, how does it work and what does it change?
A quick coupler is an interface unit mounted between the stick of an excavator and the attachment, which mechanically captures and locks the attachment pins. It has a single job: to turn the switch between bucket, breaker, ripper, auger or grapple from a pin-removal exercise into a short manoeuvre.
Read →What is a ripper, how does it work and where does it help?
A ripper is a passive attachment fitted to the stick of an excavator that tears hard ground apart with its tooth. It has no hydraulic supply; all of its force comes from the boom and stick movement of the carrier.
Read →What is a vertical drum cutter and how does it work?
A vertical drum cutter is a milling attachment fitted to the stick of an excavator that turns a single wide drum on an axis in line with the stick; it is also called an axial drum cutter. The picks on the drum take rock, concrete and hard ground away from the surface in thin layers, with no impact.
Read →What is a drum cutter and how does it work?
A drum cutter is a hydraulic attachment fitted to the stick of an excavator that mills rock, concrete and hard ground away from the surface with the picks on its rotating drums. It applies no impact to the material; as the picks turn they shave thin chips off the surface, and excavation advances as those chips accumulate.
Read →What is a crusher bucket and how does it work?
A crusher bucket is an excavator attachment, mounted on the stick, whose body houses a jaw crushing mechanism. Concrete, rock and rubble taken in through the mouth of the bucket are squeezed between a fixed jaw and a moving jaw until they break, and material reduced to the target size falls out through the bottom.
Read →Construction, foundations, infrastructure
Pile head breaking: which attachment, in what order?
The difficulty in pile head breaking is not removing the concrete but removing it without damaging the rebar. As surplus concrete comes off the pile head, the reinforcement inside has to be left exactly as it is and exposed cleanly, because that rebar will tie the pile to the cap.
Read →The attachment set for bored piles and foundation work
Foundation work is not one job but several that follow one another, and each stage asks for a different attachment. When the excavation meets hard ground a ripper or a breaker; when the formation is trimmed a drum cutter; when pile heads are broken a breaker and a pulveriser; when rubble is cleared a grapple.
Read →When rock appears in a utility trench: ripper, breaker or drum cutter
Rock appearing in a trench turns the excavation into a different job, and the decision is set between three things: advance rate, holding the trench width and flatness of the formation. A ripper is the fastest but widens the trench and spoils the profile.
Read →Choosing attachments for road and asphalt work
What decides the attachment in road work is not how hard the material is but how much the quality of the edge matters. Asphalt is relatively soft and a breaker lifts it easily; but the edge it leaves is ragged, and where a patch is to be laid that ragged edge causes trouble later.
Read →Urban excavation where blasting is not allowed: the alternative plan
On an urban foundation excavation that meets rock, blasting often never even comes up: neighbouring structures, the permit process and vibration limits close that option from the start. Mechanical excavation is what remains, and the real question there is not which attachment to use but in what order the excavation advances.
Read →Profiling in culvert and tunnel strengthening
In culvert and tunnel strengthening the work runs on different logic from new excavation: what stays matters as much as what comes out. When an existing section is enlarged, or a deteriorated part removed, the structure left behind must not be damaged, because it will go on carrying load once the work is finished.
Read →Excavating frozen ground and working in winter
Frozen ground is not a material that makes excavation harder but one that behaves differently for a while, and that distinction decides the method. The frost layer is hard and behaves towards a breaker like rock; but the ground beneath it is soft.
Read →Controlled removal in building refurbishment
Removal in refurbishment and demolition are two jobs that use the same attachments for opposite purposes. In demolition the building is going and damage is not a cost item; in refurbishment the building stays and the structure around every piece removed must not be damaged.
Read →Mining, quarrying, drilling
Choosing attachments for underground mining
What decides the attachment underground is not how much power there is but three constraints: envelope, ventilation and profile. The section is narrow, so machine and attachment size are capped from above.
Read →Quarry benches and the loading face
Output in a quarry depends less on how good the blast was than on how suited the resulting muckpile is to the loading machine. A good loading face delivers three things at once: a slope where the bucket fills easily, material sized to enter the crusher, and a face that leaves no loose blocks behind it.
Read →Blasting or mechanical excavation? How to build the cost comparison
The commonest mistake when comparing blasting with mechanical excavation is costing the blast on explosives and drilling alone. The cost of a blast is a chain: drilling, explosives, permits and notification, production stopped for the exclusion zone, scaling afterwards, and secondary breaking of the blocks that will not enter the crusher.
Read →HDD and trenchless technology: what changes in a city?
Trenchless methods allow pipe and cable to be installed without opening the surface. In a city the real gain is not in excavation cost but in the secondary costs of open-cut disappearing: road closures, stripping and reinstating the road surface, complaints from businesses and residents, safety zones and time.
Read →Drill bit selection: button bits and the DTH difference
There are two basic systems in rock drilling, and the difference is where the hammer sits. In top hammer drilling the impact is generated above the machine and transmitted down the drill string; it is fast, but energy loss grows with depth.
Read →Slope trimming and scaling: breaker or drum cutter?
Slope work divides into two, and that division decides the attachment. Scaling means bringing down loose or hanging blocks that could fall; it needs point intervention and a breaker does it fast.
Read →Rock hardness (UCS) and abrasivity: how they shape the decision
Two values used to describe rock get confused with each other: compressive strength (UCS, resistance to breaking) and abrasivity (how much it wears equipment). These are independent properties.
Read →When does blast-free excavation become mandatory?
Blasting is the fastest and cheapest method for bulk excavation; mechanical excavation cannot match it for speed. Blast-free excavation is therefore a matter of necessity rather than preference, and it comes into play in three situations: when vibration limits to a nearby structure would be exceeded, when explosives permits cannot be obtained or take too long, and when the excavation line runs close enough to buried services such as pipes, cables or tunnels.
Read →Secondary breaking: the invisible bottleneck in quarry output
Blasting is the stage everyone watches on site, but the real bottleneck usually appears after it: blocks too large to enter the crushing plant. They sit waiting, get separated, sometimes marked for a second blast.
Read →Inside the attachment
Ordering breaker spare parts: how to get the right part first time
To get the right spare part for a hydraulic breaker first time, the order needs six pieces of information: the breaker’s brand and exact model, its serial number, the part name and code where there is one, photos of the breaker’s nameplate and of the part, the main dimensions taken from the worn part, and the machine and job the breaker works on. With these the supplier identifies the part without guessing; without them every round of emails adds days of downtime.
Read →Hydraulic breaker parts and their Spanish names in Mexico, Chile, Peru and Colombia
The main parts of a hydraulic breaker are the tool, the bushings that keep it on axis, the pins that retain it, the piston that strikes, the cylinder it runs in, the valve that drives the cycle, the accumulator with its diaphragm, the back head that holds the nitrogen chamber, the tie rods that hold the body together, the seal kit, the outer housing and the hoses. Anyone working with Latin America needs to know that most of these have more than one Spanish name: in Mexico a spare part is a "refacción" and a bushing a "buje", while in Spain the same things are a "repuesto" and a "casquillo".
Read →The damage chain inside a breaker: when one part fails, which is next?
Few parts inside a breaker fail on their own; most fail as the consequence of another part failing. Which makes looking at the replaced part and saying "that part was poor quality" rather like picking a link out of the middle of a chain and blaming it.
Read →Why piston and cylinder are assessed together
Piston and cylinder work as a single pair inside a breaker: the thin film between the piston’s outer surface and the cylinder’s bore provides both the sealing and the lubrication. When one of those two surfaces is damaged the other starts to follow, because the damage transfers from surface to surface.
Read →What bushings do, how they are measured, when they finish
Bushings are the most frequently replaced and least understood parts in a breaker. Their job is not to carry the blow but to hold the tool on axis; the shank carries the blow, the bushings only maintain the alignment.
Read →The tool retainer set: pin, lock and washer
The tool retainer set is the cheapest and most misunderstood group of parts in a breaker. Its job is to hold the tool inside the housing, not to carry the blow; the blow travels from piston to tool shank and into the material, and the retaining pin is nowhere on that path.
Read →Diaphragm, accumulator and the gas chamber
A breaker can have two separate gas sections and on site both get called "the nitrogen". The first is the gas chamber: it sits above the piston and acts as the spring that drives it down, and part of the blow energy comes from there.
Read →The valve and the blow cycle: where a breaker gets its rhythm
A breaker’s blow rate depends on how quickly the piston travels back and forth, and the part that decides that is the valve. The valve builds the cycle by routing hydraulic oil alternately below and above the piston: oil goes underneath and the piston rises; the valve shifts and the piston falls and strikes.
Read →Original, aftermarket and remanufactured parts: where is the difference?
With spare parts the right question is not "original or aftermarket" but "which property is critical on this part". On some parts the dimension decides, and any part that holds the dimension will do the job; on others material and heat treatment decide, and the wrong material finishes early even when the dimension is right; on others geometry is critical, and a part that looks identical behaves differently.
Read →When to replace a worn part and when to have it repaired
The decision does not rest on how badly the part is damaged but on four things at once: can the part be brought back to dimension, has the damage passed to the neighbouring part, is the downtime the repair creates longer than replacement, and will the same failure repeat. Where all four point the same way the decision is easy; where they diverge, dimension decides.
Read →Demolition and recycling
Low vibration demolition methods
There is no absolute category called vibration free demolition; what exists are methods with markedly lower vibration, and they all share one thing: they take the material by cutting or crushing rather than breaking it with impact. Impact delivers energy at one point and all at once, and part of that energy passes into the ground and the structure as vibration.
Read →Scrap steel recovery: what clean separation is worth
The value of scrap steel is set not only by its weight but by how cleanly it is delivered. Rebar with concrete still attached, piles containing mixed metals and pieces too large to transport are priced lower because they require further processing at the buyer.
Read →Urban demolition: neighbours and vibration measurement
What delays urban demolition is usually not a technical problem but a complaint from neighbours. Once a complaint arrives, the argument becomes "is there vibration or not", and whichever side has no measurement loses it.
Read →Attachment order in reinforced concrete demolition
The attachments used in reinforced concrete demolition are well known; what makes the difference is the order they are used in. The correct order runs from mass reduction, to separating concrete from rebar, to cutting metal, to sizing.
Read →On-site recycling economics: the haulage calculation
The economics of on-site recycling do not come from one cost line but four: haulage out, tipping fees, material bought in for backfill, and the haulage of that material to site. Processing rubble on site removes all four at once, which is why the calculation looks far weaker when compared against "crushing cost" alone.
Read →Selective dismantling: how it is planned before anything comes down
Selective dismantling means taking a building apart by material group, in reverse of the order it was built, rather than bringing it down in one go. The aim is twofold: separating recoverable material cleanly, and keeping hazardous or contaminating material out of the rubble.
Read →Landscaping, farming, forestry
Tree and stump removal: which attachment?
Tree removal is not finished with one attachment but with two or three used in sequence. The general order is: loosen the ground around the root with a ripper, grip the tree with a grapple and bring it down together with its root mass, collect and load the remaining root and trunk pieces with the grapple, then dress the hole with a bucket.
Read →Land clearing and stone picking: the attachment sequence
Land clearing is four overlapping jobs: removing surface vegetation, taking out roots, picking stones and dealing with buried rock. Output comes from not trying to do all four in one pass: clear the surface first, then take out roots and stones, and assess the remaining buried rock last.
Read →Drilling holes with a hydraulic auger: posts, trees, fences
Everything about drilling with an auger comes down to two things: ENTERING SQUARE and letting the flight carry material out rather than forcing progress. Enter at an angle and the hole goes oval, the flight rubs the side wall and jamming begins; push too hard and the material cannot be carried out, the flight packs and the auger turns without advancing.
Read →A landscaping attachment set for a mini excavator
On a mini excavator doing landscaping work the attachment set starts with three items, and those three usually cover more than eighty per cent of the work: a hydraulic auger, a grapple and a small breaker. The decision that comes before all of them is the quick coupler, because landscaping by its nature means changing attachment several times a day, and with pin-on mounting the changeover can take longer than the job itself.
Read →Site and fleet management
Setting up on-site training
On-site training is not a meeting but an arrangement. Training that lasts stands on three things: short content written in the language of that site, a named person to deliver it, and an indicator that measures the result.
Read →Operator training: the single habit that extends breaker life most
Two breakers of the same brand and model give very different lives in the hands of two different operators. What creates the difference is not one technical detail but a handful of habits, and the most important of them is not blank firing.
Read →Attachment standardisation: same bracket, same tool diameter
As a fleet grows, attachment variety quietly increases, and every new variant brings its own stock line, its own tool diameter and its own bracket. Standardisation means preferring, when buying new equipment, models that share the same tool diameter, the same mounting system and where possible the same spare parts group as what you already have.
Read →Critical spare parts stock: what should be on site?
A critical part is not an expensive part; it is one whose absence stops the machine and which cannot be obtained quickly. Three criteria define criticality: probability of failure, lead time, and whether you can work without it.
Read →Downtime: the cost that dwarfs the price of the part
The cost of a breakdown is not the part price written on the invoice. When a machine stops, the operator waits, other crews on site wait, the programme slips and on some contracts delay penalties start.
Read →Export and purchasing
Container loading and CBM: what decides the freight cost?
CBM is the volume of a shipment in cubic metres, and at its simplest it is the length, width and height of the package in metres multiplied together. What decides the freight cost, though, is usually neither volume nor weight alone but the chargeable weight found by comparing the two: the carrier takes whichever comes out higher.
Read →Certificate of origin, A.TR and EUR.1: what each one does
These three documents do not prove the same thing and cannot replace one another. A certificate of origin shows WHERE THE GOODS WERE PRODUCED.
Read →Payment methods and letters of credit in export
Choosing a payment method in export is not a matter of price but of HOW RISK IS SHARED. With advance payment the risk sits entirely with the buyer: they send the money and wait for the goods.
Read →Becoming a dealer or distributor: what you need to be ready for
A dealer and a distributor are not the same thing: a dealer generally sells in a defined area and holds stock against demand, while a distributor holds stock for a country or a wide region, manages a sub-dealer network and takes on the first level of after-sales support. What the manufacturer looks at is the same three headings in both cases: real reach in that market, after-sales service capacity, and the financial structure to carry a spare parts stock.
Read →Importing breakers and spare parts from Türkiye to Latin America: documents, origin and lead times
As of October 2026, Chile is the only one of Chile, Peru, Mexico and Colombia that has a free trade agreement (FTA) in force with Türkiye. The agreement has been in force since 1 March 2011, and industrial products of Turkish origin that meet the rules of origin enter Chile duty free when proof of origin is presented.
Read →Why test reports matter: what to check before shipment
Pre-shipment inspection means confirming that goods are in the expected condition before they leave, and it prevents most of the arguments that arise on arrival. It covers three headings: that the product is the right model and configuration, that a test record documents it as working, and that the packing suits the journey.
Read →HS code and customs when importing breakers: what to watch
The HS code (Harmonised System) is the international classification number that determines which category a product falls into at customs, and it affects everything from the duty rate to the documents required. A wrong code carries risk in two directions: paying too much duty, or penalties and delays from an incorrect declaration.
Read →FOB or CIF: the real cost difference for the buyer
The delivery term (Incoterm) determines what the price covers and where risk changes hands; for two quotes to be comparable, both have to be given on the same term. An FOB price covers costs up to loading the goods onto the vessel at the port of shipment; sea freight and insurance are the buyer responsibility.
Read →Other resources in this section
Fault-finding guides
Start from the symptom: not striking, striking weakly, blank firing, overheating, leaking oil.
Attachment selector
Enter your machine tonnage and see what fits. Every attachment family on one screen.
Comparisons
Breaker or ripper, drum cutter, Red or Grey, with the limits of both sides stated.
Industry glossary
90 terms, 13 categories, three languages and links into the site.