Crawler excavators are generally considered universal equipment, suitable for complex types of terrain and soils. However, when working on unstable soils (peat, sand, silt, swampy areas), their behavior requires separate analysis. In this article, we will analyze how a crawler excavator works in conditions of a weak foundation, and which models and configurations should be chosen to minimize the risks of downtime, breakdowns and excessive fuel consumption.

Why unstable soils require a special approach

Unstable soils have low bearing capacity and are prone to settling and shifting. Operating equipment in such conditions can result in:

  • subsidence or bogging of the excavator;
  • violation of the geometry of the bucket and boom;
  • deformation of tracks or damage to the chassis;
  • excess fuel consumption due to slippage;
  • risk of tipping over when working on slopes and edges.

All these factors entail not only repairs, but also stoppages at the construction site, which in the context of commercial construction results in losses.

What parameters are important when choosing equipment

To ensure that a crawler excavator operates efficiently even on unstable soils, the following characteristics must be taken into account when selecting a model:

  • Track width and type . The wider the track, the lower the specific ground pressure. Models with rubber or extra-wide steel tracks are suitable for working on peat and sand.
  • Weight and balance . Lightweight models are preferable for marshy areas, but with a mandatory stability check.
  • Availability of hydraulic adjustments . The ability to adapt the pressure of the bucket and boom reduces the risk of slippage and subsidence.
  • Telematics system . Models with GPS control and tilt sensors help avoid accidents in real time.

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Examples of models suitable for unstable foundations

Some manufacturers already offer solutions for such conditions:

  • Hitachi ZX135US-6 is a shortened model with an optimal ratio of weight and stability, recommended for swampy areas.
  • Komatsu PC138US-11 – reduced ground pressure thanks to innovative chassis.
  • Hidromek (e.g. HMK‑230 LC) is a Turkish manufacturer that focuses on durability and adaptability of designs to heavy workloads, including work on soft ground.
  • Sinomach ZG3365LC‑9C is a Chinese excavator equipped with a reliable Cummins engine and reinforced hydraulics, ideal for difficult conditions and mining.

When choosing special equipment excavators, it is important to consider how well the model is adapted to real soil conditions, and not just to the nominal characteristics from the catalog.

Tips for use on unstable soils

Even the best model will not give results without proper operation:

  1. Preliminary preparation of the site – leveling, gravel filling, laying geotextiles.
  2. Bucket loading control – avoid overloading, especially at the edges of pits and trenches.
  3. Regular cleaning of the chassis – stuck silt and clay increase wear.
  4. Visual control of the draft – at the slightest list, stop work and revise the plan.

What to consider when buying equipment for difficult conditions

If you have to work on unstable soils, you should pay attention to:

  • used equipment with a guarantee – availability of official diagnostics and service;
  • equipment adapted to Ukrainian climatic and geological conditions;
  • import of used equipment from Europe , if a high quality standard is required, but with budget savings.

It is also important to determine where to order used equipment from Europe to avoid purchasing equipment that is not designed to work in damp climates and unstable foundations.

Final advice: how to choose a reliable partner

Unstable soils require precise selection of equipment and competent support after purchase. At TAD Group, we don’t just sell equipment — we select solutions for specific customer conditions. We have access to used special equipment with a service history, proven chassis and adaptation to Ukrainian soils. Contact us – we will help you choose equipment that will not let you down.