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Used hydraulic dump cylinders for dump trucks: Codimatra stock

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A dump bed that rises slowly, stops rising altogether, or shows oil leakage at the base of the cylinder – it's often the dump cylinder that's at fault, not the bed itself. As a specialist in used earthmoving parts for over 40 years, Codimatra offers tested used dump cylinders on a hydraulic test bench, for articulated and rigid dump trucks of all brands. Each double-acting cylinder is pressure tested before resale.

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The Role of the Dump Cylinder on a Dump Truck

The dump cylinder (or tipping cylinder) is the hydraulic actuator that lifts and lowers the dump bed of an articulated or rigid dump truck. It is a piston-type hydraulic component known as a double-acting cylinder: supplied alternately to its two chambers, it controls both the lifting and the controlled lowering of the bed, unlike a single-acting cylinder which only works in one direction.

Depending on the model and capacity of the dump truck, one or more dump cylinders may be installed in parallel to distribute the lifting force. For high-capacity dump trucks (30 tonnes and above), it is common to find two dump cylinders working simultaneously.

This component operates under very high service pressures, reaching 300 to 350 bars depending on brands and models, and undergoes several hundred dumping cycles per week on machines in heavy use.

Signs Indicating a Faulty Dump Cylinder

How to tell if a hydraulic cylinder is faulty? Several signs can quickly answer this question before a more serious failure occurs.

Signs to watch for:

  • Slow or incomplete bed lift: indicating internal seal loss (worn seals) or insufficient hydraulic pressure
  • Visible oil leakage at the rod base or cylinder seals
  • Irregular or jerky dumping: possibly air in the circuit or cylinder misalignment
  • Rod scratched or corroded: visible to the naked eye when the cylinder is extended, indicating advanced mechanical wear
  • Abnormal noise during dumping (clicking, squeaking) possibly indicating a mounting or pin issue

A defective dump cylinder must never be ignored: failure during dumping can cause the bed to fall suddenly, posing a real danger to people near the machine.

What is the lifespan of a dump cylinder? A refurbished cylinder with new seals and restored sliding surfaces can offer several thousand hours of service, depending on usage intensity and site conditions. A hydraulic cylinder kit for dump beds (seals + rod) often significantly extends the component’s service life before a complete replacement is necessary.

Used Dump Cylinders Available: Brands and Covered Dump Trucks

Our dump cylinder stock covers the main brands of articulated and rigid dump trucks found on construction sites, quarries, and mines in France and Europe.

Caterpillar — dump cylinders for articulated dump trucks (series 725, 730, 735) and rigid dump trucks (notably series 773). High service pressures matching original specifications.

Volvo — cylinders for the A range of articulated dump trucks (A25, A30, A35, A40).

Bell — dump cylinders for B25, B30, and B40 articulated dump trucks, capable of pressures up to 320 bars.

Liebherr — cylinders for rigid dump trucks, sourced from disassembled quarry and mine machines.

JCB — dump cylinders for articulated dump trucks, subject to dismantling stock availability.

Each cylinder is tested on our hydraulic test bench before restocking: seal integrity checks, service pressure verification, rod and sliding surface inspection. Unlike buying used cylinders privately via classified ads, our parts receive full refurbishment and documented traceability.

Your brand or model not listed? Our physical stock updates weekly. Complete the parts request form or call us directly at +33 (0)5 18 23 21 34 with the brand, model, and if possible the serial number of your dump truck.

How to Choose the Right Used Dump Cylinder: Technical Criteria

Selecting a used dump cylinder requires precise verification of multiple technical parameters to ensure perfect compatibility with your dump truck.

  • Maximum service pressure: must match your machine’s hydraulic circuit specs. An under-rated pressure cylinder risks premature failure
  • Effective stroke length: determines dumping range — a cylinder too short limits tilt angle, too long may bottom out
  • Mounting center distance: to be measured precisely on the old cylinder to ensure fit without modifications
  • Rod and bore diameter: must exactly match the original model’s dimensions
  • Compact dimensions: a refurbished dump cylinder retains original manufacturer dimensions, allowing installation without adaptation
  • Manufacturer reference: engraved on the old cylinder, enabling quick and reliable identification by our technical team. Prefer original or fully compatible parts to avoid installation issues

Our team supports you in this verification to ensure the selected cylinder meets your machine’s exact requirements.

Related Parts to Check When Replacing a Dump Cylinder

When replacing a dump cylinder, several associated components should be inspected to prevent subsequent breakdowns.

  • The dump bed itself: If the cylinder leaked for an extended period, check that the bed structure has not been damaged by irregular dumping or repeated jolts
  • Pivot pins and bushings: subjected to high stress each dumping cycle, they often wear alongside the cylinder and must be checked
  • The hydraulic distributor: if faulty or clogged, it can cause insufficient pressure or irregular dumping, even with a new cylinder
  • The hydraulic pump: a worn pump may no longer deliver the flow needed for smooth dumping, even after cylinder replacement

Other Types of Hydraulic Cylinders for Earthmoving Equipment

The dump cylinder is part of a wider family of essential hydraulic components for earthmoving machines. Depending on the system on your machine, you may need another type of cylinder:

Discover our full range in our used hydraulic cylinder general catalog, covering all categories.

The most common signs of a faulty dump cylinder are visible oil leakage at the rod base, abnormally slow or incomplete bed lift, jerky or irregular dumping, or visibly scratched or corroded rod. If several symptoms appear simultaneously, the cylinder must be disassembled for a full check of its seal integrity and sliding surfaces.

The price depends on the brand, dump truck model, and the cylinder’s overall condition. A reconditioned used part generally offers significant savings compared to a new cylinder while providing comparable performance thanks to systematic seal replacement and test bench validation. Contact our team with your dump truck reference for an accurate quote.

A fully refurbished dump cylinder — new seals, restored sliding surfaces, pressure-tested — can offer several thousand operating hours, comparable to a new part. Actual lifespan then depends on operating conditions: dumping cycle intensity, materials transported, regular hydraulic circuit maintenance.

Earthmoving machines use several types of cylinders depending on function: dump cylinders for tipping dump trucks, steering cylinders for maneuverability, boom and bucket cylinders for excavator movements, and swing cylinders for articulated arms. All operate on the same hydraulic principle — converting oil pressure into linear motion — but differ in sizing and installation points.

Provide us with the exact brand and model of your dump truck, as well as the manufacturer reference engraved on the old cylinder if still legible. Otherwise, mounting center distance and rod diameter also help identify the compatible part.

Yes, all our used parts are covered by our warranty policy against operational defects and sealing issues. Please see our warranty page for detailed terms.

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