How much material can a Komatsu D155A move in an 8-hour shift?

A Komatsu D155A can move roughly 1,500 to 2,300 m³ of loose material in an 8-hour shift when the push is short, the ground gives good traction, and the work area allows continuous cycles. Longer pushes, slopes, rock fill, and time spent ripping can reduce that output considerably.

The reason the D155A can handle this type of bulk work is simple: it is a roughly 40-ton dozer with around 360 hp and a Semi-U blade holding about 9 m³. That gives it much more material per push than a smaller site dozer.

This article uses simple working examples to show how much material the D155A can move in sand, soil, and rock fill, and why push distance and site conditions matter as much as blade size.

Komatsu D155A blade capacity and pushing power

Komatsu D155A sits in a useful position for bulk earthmoving: large enough for heavy production, but still suitable for construction sites, stockpiles, road work, quarry support, and large-scale grading.

Its Semi-U blade carries around 9 m³ of material, while the machine weighs about 42 tons and has around 360 hp. 

If the blade holds 9 m³ but is around 80% full during a normal push, the dozer is actually moving about:

9 m³ × 80% = around 7 m³ per push

If it completes 40 productive cycles in an hour, that becomes roughly:

7 m³ × 40 cycles = 280 m³ per productive hour

An 8-hour shift will not normally contain eight full hours of continuous pushing. Refuelling, repositioning, turning, waiting, breaks, trimming, and moving between push lanes all take time.

With around six productive hours, the same simple example gives:

280 m³ × 6 hours = around 1,680 m³ per shift

Estimated D155A output in sand, soil, and rock fill

Different materials fill and move across the blade differently. Loose sand and soil generally allow a better blade fill and smoother pushing. Mixed rubble is less predictable. Rock fill may leave more empty space in the blade and can require ripping before the real dozing begins. A practical starting range for a short push of roughly 20 to 30 metres looks like this:

These are planning estimates, not fixed production figures. For example, moving dry sand across a prepared pad is very different from pushing compacted rocky material on uneven ground. The same D155A dozer can therefore have two very different shift totals without anything being wrong with the machine.

How push distance changes Komatsu D155A production

Push distance can change the result more than many buyers expect. Imagine two D155A dozers with the same blade, operator, and material. The first pushes material 20 metres before reversing. The second pushes the same material 60 metres.

The second machine spends much more of every cycle travelling forward and reversing back to the cut. Even if the blade carries exactly the same amount, it completes fewer cycles every hour.

A simple planning range shows the difference:

This is why site layout matters. If a project needs to move material a long distance, continuously pushing it with a dozer may stop making sense. The D155A can open the cut and move material over the shorter section, while a wheel loader or dump truck handles the longer haul.

Ground conditions, slopes, and operator efficiency

A flat, firm push lane lets the D155A use its weight and power effectively. Tracks can hold the ground, the blade fills properly, and the operator can maintain a steady cycle. 

Soft or uneven ground changes that. In loose sand, mud, or poorly compacted fill, some engine power is lost through track slip. The dozer may still move material, but each cycle can take longer. 

Slopes make an even bigger difference. A downhill push lets gravity help the machine. An uphill push makes the D155A move its own 40-ton mass plus a full blade of material against the slope.

Operator technique also adds up across a full shift. A good operator keeps the blade full without digging too deeply, limits track spin, reverses efficiently, and avoids unnecessary steering. Saving only a few seconds on every cycle can mean many extra pushes by the end of the day.

For bulk work, the strongest setup is usually:

• Short push distance.
• Firm working surface.
• Good blade fill.
• Limited turning.
• Organised push lanes.
• Material that has already been ripped when necessary.

Komatsu D155A vs smaller dozers for bulk earthmoving

A larger dozer is not automatically better for every job. A Cat D6R XL can make more sense for road preparation, medium earthmoving, backfilling, or sites where space is limited. It is easier to move between work areas and does not bring the same transport requirements as a 40-ton machine.

The D155A becomes more useful when volume starts to matter. If a project needs to push thousands of cubic metres of fill, open a large site, develop a quarry area, or work repeatedly with heavy material, the larger blade means fewer passes to move the same volume.

A Cat D8T is much closer to the D155A in role. Both belong in the heavier production-dozer range and can be used for bulk earthmoving, ripping, large cuts, and major site preparation.

So the real question is not whether the D155A moves more material than a smaller machine. It does. The question is whether the project has enough bulk work to make that extra production useful.

Find Komatsu D155A dozers on Makana

Browse Komatsu D155A-6R crawler dozers on Makana for heavy earthmoving, bulk dozing, stockpile work, site preparation, and ripping.

Each machine can be reviewed through detailed specifications, photos, videos, and a 75+ point inspection report, so you can see the undercarriage, blade, ripper, drive system, hydraulics, structure, cabin, electronics, and overall operating condition before buying.

You can also browse other crawler dozers when the project needs a smaller or different production class.

FAQs

How much material can a Komatsu D155A move in 8 hours?

A practical estimate is around 1,500 to 2,300 m³ of loose sand or soil during an 8-hour shift with short pushes and good working conditions. Longer push distances, rock, slopes, and difficult ground can reduce the output considerably.

What is the Komatsu D155A blade capacity?

The D155A can use a Semi-U blade of around 9 m³. The exact blade capacity depends on the configuration. (komatsu.com)

How much material does a D155A move in one push?

A 9 m³ blade does not normally mean 9 m³ moved on every pass. At around 80% blade fill, a simple working estimate would be about 7 m³ per push.

What push distance is best for a Komatsu D155A?

Short pushes generally give the highest production. A push of around 20 to 30 metres allows many more cycles per hour than pushing the same material 60 or 80 metres.

Can a Komatsu D155A push rock?

Yes. The D155A is suitable for heavy earthmoving and ripping applications. Hard or compacted rock may need to be ripped first, and production will normally be lower than with loose soil.

Is the Komatsu D155A suitable for bulk earthmoving?

Yes. Its roughly 40-ton size, large blade, and heavy pushing capability make it suitable for large cuts, fill work, stockpiles, quarry development, and major site preparation. (komatsu.com)

Is a D155A better than a smaller dozer?

For high-volume earthmoving, usually yes. For smaller grading jobs, restricted sites, and lighter work, a smaller dozer may be more practical and economical.