Buying an excavator sounds straightforward until you’re standing in a yard staring at ten machines that all look “pretty good.” Then the questions hit: size, hours, attachments, transport, ground pressure, financing… and suddenly you’re doing project management just to buy the tool.
Here’s the thing: the “best excavator” is usually the one that fits your site, your operators, and your cashflow without punishing you later.
Start with the job, not the brand
If you tell me the make and model you want before you tell me what you’re doing with it, I already know how this ends: you’ll buy something that’s either undergunned or too big to use efficiently.
Think through these before you look at listings (including excavators for sale):
– Primary work: trenching, bulk cut, footing excavation, drainage, rock breaking, loading trucks, light demolition
– Dig depth & reach: not as glamorous as horsepower, but it’s what decides if you’re constantly repositioning
– Site access: gate width, overhead services, soft shoulders, tight backyards (Australia has plenty of them)
– Ground conditions: reactive clay, sand, rock shelf, wet ground, this changes everything
– Lift requirements: pipe, pits, rock buckets, trench shields… lifting charts exist for a reason
One-line reality check: If it can’t get onto the site easily, it’s not “more capable,” it’s just more expensive.
Mini, standard, or large? The three excavator personalities
Mini excavators (roughly 1, 6 tonnes)
These are the kings of “get in, get it done, get out.” Tight access, minimal turf damage, cheaper transport, and you can run them with a smaller support crew.
In my experience, minis punch above their weight when you fit the right hydraulic attachments. Just don’t pretend a 1.7-tonner is a bulk earthworks machine. It’ll do the job… slowly… while wearing itself out.
Typical sweet spots:
– backyard drainage and services
– small footings and trenches
– landscaping and light civil in confined areas
Standard excavators (about 7, 25 tonnes)
This is the workhorse class. Enough stability to lift properly, enough power to dig hard ground, and they don’t feel like a compromise most days.
Technical briefing mode: the mid-range machines usually give you the best balance of bucket breakout force, hydraulic flow, tail swing configuration, and undercarriage durability for general construction.
Large excavators (25 tonnes and up)
My blunt take: if you don’t already know you need a large excavator, you probably don’t.
Mining, quarrying, serious bulk cut, big demolition, high-production loading, this is where they earn their keep. They also chew through wear parts, demand more from operators, and punish bad planning (transport, clearances, benching, exclusion zones).
Specs that matter more than the sales pitch
Operating weight: stability, transport, and ground pressure collide
Heavier isn’t automatically better. A heavier machine generally lifts better and feels planted, but it can also:
– increase mobilisation cost
– sink or rut soft ground
– require more robust float/ramps and site prep
Now, this won’t apply to everyone, but if you’re constantly working on finished surfaces or soft sites, you’ll care about ground pressure more than raw weight. That’s where track width, pad type, and undercarriage setup become real money.
Engine power (and the part people miss)
More kW helps, sure. But I care about how that power is delivered through the hydraulics. Two excavators can have similar horsepower and feel completely different because of pump tuning, flow sharing, and how the machine manages load-sensing.
Look, if you’re running a breaker all day, don’t buy a machine that’s “breaker capable” on paper but miserable in practice. You want consistent flow, cooling capacity, and a hydraulic system that isn’t on the edge of its limits.
A concrete data point: fuel is not a rounding error anymore. Australia’s Bureau of Infrastructure and Transport Research Economics tracks fuel price movements and long-term trends, and diesel volatility has been a persistent theme (BITRE, Fuel Price Report, Commonwealth of Australia):
Source: https://www.bitre.gov.au/publications/ongoing/fuel_price_report
That matters because a slightly more efficient machine, used hard, can quietly pay for itself.
Picking the right size: a practical way to decide
Ask yourself one slightly annoying question: What’s the smallest excavator that can do 80% of my work comfortably?
That’s often your best starting point, because oversizing shows up as wasted fuel, awkward access, and poor utilisation.
Then check the “gotchas”:
– Do you need to lift heavy items at radius? (lifting charts, not vibes)
– Will you be trucking spoil fast enough? Big excavator + no trucks = expensive idling
– Can your float/low-loader handle it legally and safely? Mass limits aren’t optional
Some projects justify oversizing. Many don’t.
New vs used excavators: not a moral decision, a spreadsheet decision
New machines
You’re buying uptime, warranty, and modern safety/efficiency features. You’re also buying depreciation.
I’ve seen new excavators make perfect sense for contractors who can keep them busy and want predictable maintenance windows. The minute utilisation drops, the numbers get ugly.
Used machines
This is where the bargains live… and where the traps live too.
A used excavator can be a weapon if:
– you can verify service history
– undercarriage isn’t near end-of-life
– hydraulics are tight (no lazy functions, no drift, no weird heat issues)
– hours match the condition (hours lie sometimes)
One short paragraph, because it needs saying:
A cheap used excavator can become the most expensive machine you own.
Attachments: the fastest way to make an excavator profitable (or pointless)
A bare machine is fine. A well-kitted machine is a different business.
Attachments that actually change what you can quote on:
– Buckets: GP, trenching, mud, rock (bucket choice affects cycle time more than people admit)
– Hydraulic hammer: check carrier weight class and hydraulic flow requirements
– Tilt bucket / tilt hitch: grading efficiency jumps when operators know how to use it
– Thumb / grapple: demolition, clearing, handling pipe or rock
– Auger: footings, posts, screw piles (depending on setup)
Compatibility matters. Flow and pressure matter more. And yes, good quick hitches are worth paying for (I’m opinionated on this because I’ve seen the alternative go wrong).
Inspecting before you buy: what I’d check in the yard
You don’t need to be a diesel mechanic to spot a bad buy. You just need a process.
Walkaround first. Then get picky.
Undercarriage
– track chain wear, sprockets, idlers, rollers
– uneven wear patterns (alignment issues or poor maintenance)
– track tension and signs of neglect
Hydraulics
– leaks at cylinders and valve bank
– smooth operation at full temperature (cold machines can hide problems)
– listen for pump noise under load
Structure
– boom/stick cracks, fresh paint in suspicious areas
– slop in pins and bushes (a little is normal, a lot is a bill)
– slew ring play and slew motor behaviour
Cab & safety
– ROPS/FOPS condition, seatbelt, mirrors/cameras
– warning systems and monitors functioning
– visibility and ergonomics (operator fatigue is a real cost)
If you can, get an independent inspection. It’s not overkill; it’s cheaper than rebuilding a final drive.
Budgeting: the costs people “forget” until they hurt
Purchase price is just the entry ticket.
Plan for:
– fuel (and idle time)
– servicing, filters, oils, grease
– undercarriage wear parts
– pins/bushes, bucket teeth, GET
– insurance and security (theft risk is real)
– transport and permits
– operator training and compliance costs
Operator training isn’t a feel-good add-on, either. A skilled operator will save you fuel, reduce wear, and avoid the sort of incidents that ruin schedules.
Financing: lease vs loan, but with real-world context
Lease financing can be great for cashflow. Lower upfront hit, sometimes bundled maintenance, and it’s easier to keep fleet modern. The downside is you don’t own the asset at the end unless there’s a buyout arrangement, and terms can punish heavy hours.
Loans cost more per month in many cases, but ownership gives flexibility: sell it, trade it, keep it, modify it. Equity matters if you’re building a fleet over time.
Caveat up front: your best option depends on how steady your work is. If your workload swings wildly, locking into aggressive repayments can turn a good year into a stressful one.
One last (slightly unpopular) take
Buying the excavator is the easy part.
Owning it well, matching it to the work, maintaining it before it screams, fitting the right attachments, and putting competent operators in the seat, is where the profit actually comes from.