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À LA PELLE, the specialist in hydraulic excavator attachments Who is Arnaud Dufour
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Wear parts

Hydraulic hoses and fittings

Three hydraulic hoses running along an excavator arm and crimped into their swivel-nut fittings; on one of them the cover is torn away and the metal braid shows bare and frayed.
The cheapest part on the machine:
and the one whose failure costs the most.
Synthetic image.

A hose that lets go means oil on the ground, a job stopped and sometimes an attachment lost.
It is the cheapest wear part and the one that costs the most when it is neglected.

Other names for this part: hydraulic hose, flexible pipe, high-pressure hose, fitting, coupler, hydraulic end fitting, olive.

The essentials
Family
Wear parts
Classes or machines concerned
All
Fitting
As an original-equipment replacement, depending on the circuit
Power source
None: part of the hydraulic circuit

All wear parts →

01 Use

What it is for

On the left, hoses clamped in place, with no contact with the machine structure. On the right, a hose that rubs wears down to the braid and ends up bursting. Computer-generated image.
hoses clamped in place, with no contact with the machine structure a hose that rubs wears down to the braid and ends up bursting
Left: hoses clamped in place, with no contact with the machine structure.
Right: a hose that rubs wears down to the braid and ends up bursting.
What sets them apart:
it is the cheapest wear part, and the one that costs the most when it is neglected.
Computer-generated image.
A hydraulic hose whose rubber cover is torn away over a section, leaving the metal reinforcing braid bare, with broken wires sticking out.
This hose has not leaked yet, and it already has to be changed:
a bare braid means the failure is close.
Synthetic image.

A hose links what moves to what does not move.
It works under pressure, in bending and in rubbing, and it is almost always the rubbing that kills it first.

The fittings decide the compatibility between your machine and the attachment:
thread, cone, size.
Two circuits of the same flow do not necessarily connect to one another.

Never look for a leak with your hand. A jet of oil under pressure goes through the skin with no visible wound and causes a serious injury that calls for immediate treatment.
You look for a leak with a piece of cardboard, with the machine stopped whenever possible.

02 Key technical data

On which machine?

The hoses and fittings suit all machines, depending on their circuit.
Each part replaces the original part, on the coupler circuit.

What the tool does

These are wear parts of the hydraulic circuit.
The weight of each part: we calculate it with you for your machine.

What is needed on the hydraulic side

No power source is needed: it is a part of the hydraulic circuit.

Your study sets the exact value for your machine.

How to read these values →

03 Your study

Have your machine checked.

Tell us what let go and on which circuit.
A photograph of the marking and of both fittings nearly always lets us make the hose again identically.

What we need to answer you
  • Your machine Its exact make and model.
  • What is fitted What equips the machine today.
  • The work What the machine is used for.

Without these details, the study still begins: we will ask you for them.

Book an appointment with the specialist

Or call 01 84 16 55 49 · our lines are open 7 days a week, from 7h to 22h.

Written study within 3 working days, once the file is complete.

04 Choice

What determines the choice

  • 01 — The working pressure It is read on the hose fitted.
    A hose that holds the static pressure may not hold the peaks from a hammer.
  • 02 — The number of plies One, two or four plies of braid:
    that is what separates an oil return line from a breaker line.
  • 03 — The type of fitting BSP, JIC, ORFS, cone type:
    the thread alone is not enough to identify it, the angle of the cone counts.
  • 04 — The routing Length, bend radius, protection against rubbing.
    A hose that is too short tears, a hose that is too long rubs.
05 Check

What is checked before ordering

  • Record the marking printed on the hose:
    diameter, plies, pressure.
    It is written on it, you just have to wipe it.
  • Photograph both ends — a fitting is identified better from a photograph than from a description.
  • Measure the length between fixing points, not the length of the hose lying slack.
  • Look for the cause before replacing:
    a hose that always breaks in the same place is rubbing, and the new one will break in the same place.
To go further
A question about an attachment? 01 84 16 55 49 Send my photos