Best bulldozers for earthmoving
Discover the top bulldozers in 2025. Ranked by brand and model, showcasing the best dozers for heavy earthmoving, construction, and mining from leading manufacturers worldwide.
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The 2021-2025 generation of Caterpillar over-50-ton bulldozers D9 series has garnered a wide popularity among heavy duty site operators. With trims like the D9T and D9R, the powerful tractor introduces CAT's newest C18 family of diesel engines.
- Powerful traction
- Wide blades over 12 m3 options
- Single and multi-shank ripper options
Overview
The 2021-2025 generation of Cat D9 bulldozers builds on years of trust in the industry with a machine that’s designed for tough jobs. It brings modern upgrades like better fuel efficiency, new tech, smoother controls, and more comfort inside the cab. It simply means getting more done with less hassle.
What’s new
This generation of the D9 focuses on automation and operator comfort. Some key upgrades include:
- Fuel-saving technology: The Enhanced AutoShift system automatically selects the best gear based on how hard you’re pushing the machine. That means you’ll burn less fuel, averaging around 15 liters per hour in moderate conditions.
- Cat GRADE with 3D: This optional GPS-based feature makes grading a breeze. Set it up, and the dozer adjusts the blade for you, saving time and increasing precision.
- Improved operator station: The cab is quieter, the air-suspension seat takes the edge off rough terrain, and a new touchscreen display gives you more control without the need for extra dials.
- Tier 4 Final engine: The new Cat C18 ACERT engine complies with Tier 4 emissions standards, reducing your environmental footprint, but also requiring more attention to maintenance.
Performance and efficiency
The 2021-2025 D9 handles heavy-duty jobs like a pro. In mining operations, limestone quarries, or coal pits, it performs well under rough conditions, thanks to its powerful engine and tough undercarriage. The C18 still delivers the same reliable 436 hp, but the real upgrade is in fuel efficiency. With the new Enhanced AutoShift system, the machine selects the right gear automatically based on how much load it’s under, which means it doesn’t guzzle fuel when you don’t need the extra power.
The electro-hydraulic system improves blade responsiveness. Whether you’re doing bulk earthmoving or finishing work, blade control is smooth and predictable. The optional Cat GRADE with 3D automates the grading process, cutting down on the number of passes needed to hit grade specs, which saves both time and fuel. In terms of raw power, the D9 stays a workhorse, capable of pushing through tough materials like sandstone or compacted clay with ease.
Cabin and controls
The cab upgrade is where operators will feel the biggest difference. The air-suspension seat means you’re not getting bounced around on rough terrain all day. Whether you’re working in a rocky quarry or on a construction site with uneven surfaces, the suspension smooths out the ride. Visibility is better, too. Cat redesigned the cab to give you more sightlines around the blade and ripper, which helps in tighter areas or when precision is a must.
Another big improvement is the move to a digital touchscreen display. Instead of the old analog gauges, you’ve got everything you need in one place—engine diagnostics, fluid levels, and blade settings. The controls are more intuitive, with less hand fatigue from constant adjustments. This is especially useful when using automation features like AutoCarry, where you can focus more on the job at hand and less on constantly managing the machine.
Safety
When it comes to safety, Cat didn’t cut corners. The D9’s ROPS (rollover protection structure) provides top-notch protection in case of an accident, keeping operators safe in risky environments like mining or demolition. The improved LED work lights also help a lot during early morning or late-night shifts, giving better visibility across the whole work area.
Onboard diagnostics give you real-time alerts on machine health, whether it’s oil pressure, hydraulic fluid levels, or the status of your emissions systems. These warnings help prevent breakdowns before they happen, keeping both operators and the machine out of harm’s way. Load-sensing alarms are a key feature too, letting the operator know if they’re pushing too hard, which helps prevent overloading and keeps the machine working longer.
In comparison
Compared to the older 2004-2015 model, the 2021-2025 D9 brings noticeable improvements in both performance and operator comfort. The old D9 was a beast in its own right, but it didn’t have the same level of automation or fuel-saving tech. The Enhanced AutoShift in the newer model means you’re not over-revving the engine and wasting fuel, which wasn’t the case with the older transmission. Plus, the optional Cat GRADE with 3D makes a huge difference in precision work, something the older model simply didn’t offer.
From a maintenance standpoint, daily check ups like oil level and filter changes are easier with improved access points on the newer D9. The Tier 4 Final engine does mean more attention to emissions-related components, like the diesel particulate filter (DPF) and selective catalytic reduction (SCR), but with better diagnostics, it’s easier to stay ahead of issues before they become costly repairs. The ride is also noticeably smoother on rough terrain like coal mines with the new cab design and suspension, something operators will appreciate during long shifts.
Final verdict
The new Cat D9 (2021-2025) is a clear step up from its older sibling. For operators in heavy-duty environments like quarries, mining, and large-scale construction, it offers improved fuel economy, better comfort, and smart automation features that reduce the strain of everyday tasks. Yes, the upfront cost is higher, especially with features like Cat GRADE with 3D, but the long-term savings in fuel, time, and maintenance make it a solid investment.
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AED 2,200,000Starting from
AED 2,000,000:quality(50)/60971/1eadf789-097c-447a-af88-9e7744dcea0a.png)
Overview
The D155A lineup is Komatsu’s mid‑size crawler dozers- tough enough for everything from heavy grading to landfill duty. As it marches from the -1 to the int’l -8, you get cleaner emissions, better cab comfort, auto‑idle, and SIGMADOZER options. SL gives you wider tracks, WH makes it trash‑tough. In short: get your telco-ready hard hat on, the D155A means business.
What’s new
- Newer -8 models got Tier 4-final SAA6D140E‑7 engines, cleaner burn, same power bump.
- Auto-pitch and ripper auto-return cut operator fatigue; shift into reverse and the ripper raises itself.
- WH variant stacks added shields, auto-reverse fan, and striker bars for trash comp.
Performance & efficiency
The hydrostatic steering with lock-up torque converter gives smooth power transfer and lowers fuel waste, king on long hauls. SIGMADOZER blades in heavier trims mean better load carry and less spill. Operator feedback in hard ground say these keep pace with larger cats but sip less fuel, it’s that mortar-and-steel feel that seals the deal.
Maintenance & ownership
Service points are grouped, Komtrax watches your back, and parts commonality across the D-series means fewer surprises. Tier 4 systems like DPF/SCR add oiling needs and DEF cost, but overall uptime is solid if filters are changed and electronics aren’t ignored. Just budget for undercarriage on slippy ground or rotary waste sites.
In cabin & interior
Cab is quiet, pressurized, with big glass for visibility. Palm‑command joysticks, auto shift/auto‑idle features, plus auto fan, climb in, and you’re set for a long haul shift.
Safety features
Standard ROPS/FOPS, plus tight sightlines. WH models step it up with striker bars, extra guarding, and auto reversing fans, designed to soak up landfill abuse smartly.
In comparison
- Versus D155A‑1: Old-school and simple (~320 hp), but lacks Tier 4, auto systems, and comfort.
- Versus Cat D8T: D155A-8 is lighter and smaller but brings similar horsepower and bigger blades. Carry the logic of better visibility and tighter turning radius.
- Versus next-size D275A: If you don’t need ~50 t of slab and your site is tighter, the D155A saves fuel, shifts faster, and fits where the bigger rig doesn’t.
Verdict
Need a mid-size dozer that’s cleaner, smarter, and built for long shifts? The D155AX‑8 and its siblings are worth a look- earning a solid 4/5 stars. Stick with SL on soft ground, WH only if you’re trashing. Tune your service, don’t treat the tech like a nuisance, and you’ve got a solid grading and waste hauler with brains.
Owner sentiment: Rugged, ergonomic, and efficient, with the occasional electronics hiccup when DEF or sensors aren’t fed right.
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AED 342,000Starting from
AED 290,000:quality(50)/58813/0f6660f4-ad30-4bbf-a75d-9c9488112611.png)
Since 2005, the Caterpillar D6 line has evolved from the reliable D6T, known for its Tier 4 interim C9.3 ACERT engine, four‑speed fully automatic transmission, and integrated Cat Connect/GRADE tech, all wrapped up in an elevated‑sprocket undercarriage, to the game‑changing D6 XE electric‑drive model. The D6T dominated the medium‑dozer class with world‑class versatility, fuel‑saving automation (up to 30 %), and upgraded operator comfort; the D6 XE then disrupted the segment by ditching gears entirely, delivering up to 35 % better fuel efficiency, as much as 50 % more productivity, lower maintenance costs, and reduced CO₂ emissions, raising the bar on performance and sustainability.
- D6T: automatic, efficient, tech-rich dozer
- D6 XE: electric drive, lean maintenance
- Fuel savings, productivity, emissions improvements
Overview
This is Cat’s “Swiss Army” mid-size dozer line. D6K/K2 = nimble finish grader with tech baked in. D6N = balanced all-rounder with lock-up transmission. D6T = the muscle: more weight, more shove, still precise with Grade tech. LGP/XL/XW decide how light you float; WH packs landfill armor. If your work ranges from pad-finishing to serious production pushes, there’s a D6 spec that fits.
What’s new
- Transmissions and efficiency: D6N uses a powershift with lock-up torque converter and Enhanced Auto Shift. D6T adds full-time auto shift with lock-up to keep fuel burn per m³ in check.
- Grade tech: D6K2 includes Slope Assist and Stable Blade, plus optional factory-integrated Grade with 3D. D6T offers Slope Assist standard with optional GRADE with 3D.
- Emissions: Tier 4 interim or Tier 4 Final across this era, with SCR and DEF on N, K2, and T models.
Performance & efficiency
- D6K2 (finish work hero): Hydrostatic, automatic traction control, excellent blade visibility. Set up to hit target grade faster with less rework.
- D6N (do-everything): Lock-up converter plus Enhanced Auto Shift helps lower fuel use while keeping a solid push for its weight.
- D6T (production with finesse): Four-speed powershift with lock-up keeps power to the ground. With Slope Assist or 3D, the T still finishes well for its size.
Operator chatter backs the split: some prefer the D6T for ride and shove, others prefer the D6N for footprint and side visibility. Pick for the site, not the logo.
Maintenance & ownership
- DEF reality: Plan for roughly 2–3% DEF use versus fuel on D6N and a convenient 1:1 fill rhythm with fuel. Use ISO-22241 DEF and ULSD.
- Service access and telemetry: Grouped service points and connected monitoring help daily checks and planning.
- Landfill kits: WH variants add striker bars, guarding, and debris-tolerant cooling for tip-face abuse.
In-cab & interior
Pressurized cabs, air-suspension seats, seat-mounted joysticks. K2 stands out for blade sightlines and integrated displays for Slope Assist and rear camera. N and T cabs are calmer than older series.
Safety features
ROPS/FOPS, available rear camera, operator presence logic. WH machines add striker bars, extra guarding, and debris-resistant cooling for landfill work.
In comparison
Within D6 family:
- D6K2: about 13.3–13.9 t; about 97 kW/130 hp net. Best for pads, tight sites, and easy transport.
- D6N: about 16.8–18.3 t; about 124 kW/166 hp net typical. Balanced push and grading, popular as VPAT LGP.
- D6T: about 21–24 t; about 161 kW/215 hp net T4F. More shove; grade tech keeps it precise.
Against rivals (same era):
- Komatsu D65EX-16: roughly 20–23 t; about 164 kW/219 hp. Sigma blade helps carry.
- John Deere 850K: roughly 19–22 t; about 152 kW/205 hp. Nimble with strong dealer coverage in many regions.
Verdict
If your mix is finish > bulk, start with D6K2. If it’s 50/50 grading + push or you need more drawbar without stepping up to a D7, D6N hits the sweet spot. If you’re production-biased or running landfill armor, go D6T or D6T WH and let Grade tech handle the finesse.
Owner feedback: K2 is easy and fast; N is the safe bet; T is a beast, just mind weight and sightlines.
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AED 435,000Starting from
AED 410,000Related machinery rankings
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