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Hydraulic excavators

Spider excavator

Four independently adjustable legs, and an excavator that stands where no other one can.
You do not take it for output.
You take it for the slope.

Other names for this machine: spider excavator, spider, bank excavator.

The essentials
Category
No dedicated CACES category; grouped with extraction machines
Status
Direct carrier of attachments

The whole fleet →

01 Use

What it does

Silhouette of a spider excavator set across a slope: four articulated legs each adjusted to a different height, two ending in a wheel and two in a claw, carrying a turret that has stayed horizontal with its cab, its boom and its bucket. A horizontal line shows that the turret stays level while the ground is sloping. Diagrammatic silhouette, without dimensions and not to scale.
What sets it apart:
it stands where no other one would — you take it for the slope, not for the output.
Walking excavator braced on a very steep rocky bank, four articulated legs at different heights
Four legs each set at its own height, two wheels and two claws.
The machine stands where no other one would:
that is all that is asked of it.
Synthetic image.
A spider excavator at work on a cross-sloping bank, its four legs set at different heights to keep the turret level.
The four legs are not there to walk:
they are there to stay level where the ground is not.
Synthetic image.

Four independently adjustable legs:
it stands on a bank, a river bed or a slope where no other excavator can.

What it does not do. It is slow to move and expensive.
You take it for the slope, not for the output.

02 Fitting

What governs the fitting of an attachment

  • The class of the machine It is what bounds the permissible weight and volume of the tool.
    A tool that is too heavy is not merely ineffective:
    it makes the machine unstable and tires the arm.
  • The coupler system Direct mounting, mechanical, hydraulic or automatic quick coupler, and the type of the coupler itself.
    It is the first thing to identify, and the one people get wrong most often.
  • The flow of the auxiliary line Expressed in litres per minute.
    A hydraulic tool fed below its flow works badly; fed above it, it overheats and wears out.
  • The pressure available In bar.
    The flow makes the speed, the pressure makes the force.
    Both are checked, never one without the other.
  • The free return to tank Some tools, hammers and mulchers first among them, require it.
    Its absence does not show on a sales sheet and is discovered when fitting.
  • The lifting capacity at the working reach It has nothing to do with the weight of the machine.
    It is read on the manufacturer's load chart, at the real reach and height of the work.
03 Reference point

One model, as a reference point

The values below hold for this model only.
They are there to give an order of magnitude to anyone who has none, not to serve as a reference.

Menzi Muck M545
Operating weight
12,3 t
Engine power
115 kW (Deutz TCD 4.1 L4)
Horizontal reach
8,21 m
Digging depth
5,47 m
Breakout force
69 kN
Bucket
0,4 m³

Caveat. Recorded on an independent database and not on a manufacturer's sheet.
The flow and the pressure of the auxiliary circuit do not appear there:
they are, however, what decides whether a hydraulic tool can be fitted.

Source. Independent technical database LECTURA Specs,
model produced from 2013 to 2019, recorded on 1 September 2026.

These values are those of one precise model, at one precise date. They do not describe a category:
there are no characteristics of a compact loader in general, there are those of the model you have.
They change from one year to the next and never replace the data sheet of your machine.

Have your machine checked.

Give us the exact model and the work you have in mind.
We check the coupler, the flow, the pressure and the capacity on your machine, and we tell you what fits on it — and what does not.

Written study within 3 working days, complete file.

Tell us about your machine Written study within 3 working days, complete file · no obligation

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