You have a site to grade, a lot to clear and a budget that doesn’t include a new machine. You look for a CAT D3 dozer, and find a long list of names; weights don’t match, and there’s no clear distinction between D3K and D3K2. This is a start from which one wishes to get out.

This guide gets it sorted for you. We’ll be comparing the D3K and D3K2, discussing the CAT D3 specs, answering the question of how much a D3 dozer weights, and discussing what to check before purchasing a used one. The specs are provided by Caterpillar documentation and by Cat dealer listings.

What Is a CAT D3 Dozer, and Who Buys One?

The Caterpillar D3 is a small-sized crawler dozer, also referred to as a D3 bulldozer. It’s at the lowest end of Cat’s K-series dozer range and is below the D4, D5 and the D7. Its size is the thing; it fits where bigger machines can’t and is easier to haul.

Most buyers fall into a few groups:

• Site-work and excavation contractors who need a finish-grading machine on residential and commercial lots
• Landscapers and land developers doing clearing, pad work and backfill
• Farm and ranch owners building roads, ponds and drainage
• Utility crews working on pipelines and access roads

Most of the work is grading, spreading, pushing fill and light land clearing. For heavy ripping or large production pushes, you’d look at a bigger class.

CAT D3K vs D3K2: What’s the Difference?

This is the question most buyers get stuck on. Both run the Cat C4.4 ACERT engine and both are hydrostatic dozers built for grading. The D3K2 came later, around 2013, as an update to the D3K.

Spec	CAT D3K	CAT D3K2
Engine	Cat C4.4 ACERT	Cat C4.4 ACERT
Net power (SAE J1349)	74–75 hp (55.2 kW)	80 hp (59.7 kW)
Operating weight, XL	17,185 lb (7,795 kg)	17,544 lb (7,958 kg)
Operating weight, LGP	17,842 lb (8,093 kg)	18,525 lb (8,403 kg)
Grade control	Standard dozer controls	Optional Cat GRADE with 3D and Slope Assist
Emissions	Earlier generation	Tier 4 Interim, later Tier 4 Final

Some clarification of this table is in order. A bit different weights are found in later Tier 4 Final D3K2 literature with XL at 17,465 lb and LGP at 18,442 lb. Thus, the exact number would depend on the version and build of the machine. Weights are assumed to include: dozer blade, canopy ROPS, operator and full fuel tank. An enclosed cab provides approximately 495 lb (225 kg) additional weight.

Simply put, the D3K2 is more powerful and offers better grade control. The older and cheaper way of getting to the same basic machine is the D3K. Do NOT assume that specs carry over. Match numbers always according to the model and serial number.

How Much Does a CAT D3 Dozer Weight?

There is no one correct answer, which is why the search results are not uniform. The CAT D3 operating weight changes with the model, the track configuration and what’s bolted on.

• D3K XL: about 17,185 lb (7,795 kg)
• D3K LGP: about 17,842 lb (8,093 kg)
• D3K2 XL: about 17,544 lb (7,958 kg), or 17,465 lb on Tier 4 Final units
• D3K2 LGP: about 18,525 lb (8,403 kg), or 18,442 lb on Tier 4 Final units

Operating weight is the combined weight of fluids, fuel, operator and standard blade. Lightly packed for shipping,, with possible removal of Fuel or other items. The Caterpillar D3 dozer weight increases when a cab, ripper or winch is added to it. If you need a trailer or permits, ask for the weight of the particular machine you are buying.

CAT D3K XL vs D3K LGP: Which Fits Your Ground?

Track configurations XL and LGP impact dozer performance on the job.

• The extra length operation of XL gives it a greater track length than a standard machine, so it will offer better grading stability and a good balance over firm or mixed ground.
• LGP essentially stands for low ground pressure. It is a machine that has a broader track gauge and a broader shoe, so it has a better floating performance. 

The Cat says that ground pressure is 3.6 psi with 30-inch shoes on the LGP on the D3K2.

Select the XL for general grading, site preparation and firm ground. If you’re working in wet, sandy or soft ground – consider using an LGP where there is a risk of being sunk. The downside is that this means LGP machines will be wider and slightly heavier, impacting haulage.

CAT D3 vs CAT D4: Which Dozer Should You Choose?

The difference between these two is less than people think. A D4K2 makes about 92 hp and weights roughly 18,000 lb, compared to 80 hp and about 17,500 lb for the D3K2. A D5K2 steps up to about 104 hp and over 20,000 lb.

If you are grading or preparing a small lot site, cleaning trails and light clearing, a CAT D3 will suffice and is easily maneuvered to new jobs. The D4 may be worth considering if you are pushing heavier material, are working more acreage or have long production days. Many contractors begin by buying the D3, then add a heavier machine after that.

Why Contractors Buy a Used CAT D3 Dozer Instead of New

Cost is the primary and most important factor. Equipment spec sites offer the fresh D3K2 LGP around $110K, and that, rather than a quote. A 2nd-hand D3K can be sold at significantly less than half the price. We have sold our listing above for $45,000.

That gap is important to a small contractor, or to a landowner who requires the machine for a few projects a year. The value of a used dozer also decays at a lower rate than for a new dozer, so there is more resale value. When you require the most recent grade-control tech or a full warranty, new is the smart thing to do. A lot of purchasers opt for the used machine because it does exactly the same grading as the new one but costs less.

We sell used machines as they come to us, described as being in good condition. If you want an inspection or a closer look at records, tell us and we’ll arrange it.

What to Check Before Buying a Used CAT D3 Dozer

Hours alone don’t tell the story. A machine with higher hours and good records can beat a low-hour one that sat outside for years. Look at:

• Engine and maintenance history
• Operating hours against the machine’s age
• Undercarriage, including track chains, rollers and sprockets
• Blade and hydraulic cylinders for leaks and play
• Steering and transmission response
• Controls, ROPS and safety equipment
• Overall condition and service records

Undercarriage is often the biggest wear cost on a dozer, so spend extra time there.

2012 CAT D3K XL Dozer for Sale at Mico Equipment

Mico currently lists a used CAT D3K XL for sale at our Houston, Texas location. Here are the listing details:

• Year: 2012
• Hours: 7,512
• Price: $45,000
• Features: OROPS, blade shake, differential steering, engine enclosures, hand and foot controls, joystick steering, lighting and mirrors
• Undercarriage: 90%, as stated on the listing

Because it’s a 2012, it’s a D3K, not a D3K2. It suits buyers who want a compact crawler for grading, land clearing and site prep without paying new-machine prices. You can also browse our full range of used crawler dozers for sale.

Pick the Right D3 Before You Pay

Looking for a used CAT D3 dozer? Please call +1 (281) 468-9898 Mico Equipment regarding availability, additional machine information, inspection and shipping.

For the CAT D3K and the CAT D3K2, the engine family and work are identical. The D3K2 does provide additional power & grade-control features, and the D3K is cheaper. Before purchasing, ensure that you are comparing the same model and get both the XL and LGP versions to see the operating weight and machine condition. If a compact dozer is a good fit for your job, check out our 2012 CAT D3K XL and reach out to our team.

FAQ’s

How much does a CAT D3 dozer weight?

About 17,200 to 18,500 lb (7,800 to 8,400 kg), depending on the model and whether it’s an XL or LGP. Refer to the weight list above.

What is the difference between CAT D3K and D3K2?

The D3K2 is the later model. It makes 80 hp compared to about 74–75 hp on the D3K, and it offers optional Cat GRADE with 3D and Slope Assist.

How much horsepower does a CAT D3 dozer have?

The D3K is rated about 74–75 net hp. The D3K2 is rated 80 net hp.

Where can I find a CAT D3 dozer for sale?

Check Cat dealers, auction sites and used equipment suppliers like Mico Equipment, which lists used crawler dozers across the USA.