2 Stage Telescopic Hydraulic Cylinder For Dump Truck

What Is a 2-Stage Telescopic Hydraulic Cylinder?

A 2-stage telescopic hydraulic cylinder is a specialized actuator used in dump trucks (tippers) to provide a long extension stroke in a compact retracted size. Unlike a single-stage cylinder, it has two nested barrels: when hydraulic pressure is applied, the inner (smaller) stage extends first, followed by the outer stage.

This two-stage design strikes a balance between extension height and space efficiency, making it especially suitable for vehicles where mounting space is limited but a significant lifting height is needed.

Key Specifications & Design Considerations

Bore Diameter & Material Quality

Typical bore sizes range from 4 to 12 inches, depending on the model and load capacity.

High-strength alloy steel or treated steel is commonly used to ensure durability and resistance under heavy loads.

Rods are often chrome-plated for corrosion resistance and long service life, especially in harsh environments.

Stroke Length & Extension

Stroke length can vary widely—some manufacturers offer 60–120 inches (or customized) for two-stage cylinders.

Compact retracted length is a key advantage, enabling installation in tight spaces beneath the dump bed.

Pressure Rating & Actuation

Working (maximum) pressures for these cylinders typically go up to 3000 PSI (or about 200 bar), though this depends on design.

These cylinders can be double-acting, meaning hydraulic fluid is used for both extension and retraction, or single-acting, where gravity or the load returns the cylinder.

Cushioning (damping) mechanisms, such as orifice type cushions, are used to reduce shock at the end of stroke.

Mounting Options

Common mounting types: pin eye, clevis, trunnion, or combinations, depending on truck design.

It’s crucial to match the mounting style to the truck’s frame and hinge geometry to avoid side loading.

Operating Environment & Temperature

Operating temperature range often spans from –20 °C to +80 °C or more, depending on seals and materials.

In very humid, corrosive, or dusty environments, chrome plating of the final stage is often recommended to prevent corrosion and wear.

Small Sleeve Cylinders TG150/160 Series

Jiaheng small sleeve cylinder TG150/160 series is a multi-stage telescopic cylinder designed for extreme heavy loads and limited space conditions.

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Small Sleeve Cylinders TG125/130 Series

Jiaheng TG125/130 series small sleeve cylinder is a hydraulic cylinder designed for heavy-load lifting scenarios with limited space.

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Belly Lift Cylinder HG Series

Jiaheng under body cylinder is a hydraulic cylinder specially designed for heavy-load horizontal jacking

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Side-tilting Sleeve Hydraulic Cylinder (TG140 Series)

The side-tilting sleeve hydraulic cylinder (TG140 series) is a multi-stage telescopic hydraulic cylinder specially designed by Hubei Jiaheng Technology for mines and engineering vehicles.

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FE Series Front End Cylinders

FE series front push cylinder is a hydraulic cylinder designed for heavy-load horizontal propulsion.

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Front End Cyliners for Trailers

Jiaheng Hydraulic G series Front End Cyliners For Trailers is specially developed for lifting cargo compartments of heavy trucks

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Q series Dump Truck Lightweight Cylinders

Jiaheng Q series dump light truck cylinders are mainly used for light dump trucks (light trucks), small engineering vehicles, etc.

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Underbody Cylinders HG180 Series

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Small Sleeve Cylinders TG110 Series

The Jiaheng Small Sleeve Cylinders TG110 series is a multi-stage telescopic hydraulic cylinder specially designed by Hubei Jiaheng Technology for mines and engineering vehicles.

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Front End Cylinders

The Jiaheng Hydraulic Q series front hydraulic cylinder is designed specifically for lifting cargo compartments of trucks

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Belly Lift With Flange TG110 Series

Jiaheng's TG110 series of under body cylinders with Flange are high-performance hydraulic cylinders designed for heavy-load lifting

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Hydraulic Magnifying Frame

Hydraulic magnifying frame (specially used with belly-lifting cylinder) application areas: bridge construction

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Product Category

2 Stage Telescopic Hydraulic Cylinder For Dump Truck

Advantages & Use Cases

Compact Design with Long Reach

Because of its two-stage design, this type of cylinder provides significant extension while keeping the retracted length compact—ideal for dump trucks where space under the bed is limited.

Cost-Effectiveness

Compared to multi-stage (3, 4, or more stages) telescopic cylinders, a 2-stage cylinder is simpler, typically less expensive, and has fewer parts that may fail.

Efficient Hydraulic Performance

Fewer stages mean less hydraulic fluid is required for extension, improving system efficiency.

The simpler structure reduces maintenance needs and lowers the risk of seal failure.

Wide Applicability

Used in dump trucks (tippers) for construction, mining, agriculture, and waste management.

Supports a variety of mounting and stroke configurations, making it a versatile choice for OEMs and retrofit applications.

How to Choose the Right 2-Stage Telescopic Cylinder

Define Your Application Needs

Maximum lift height (stroke) needed

Load / payload of the dump bed

Mounting geometry (pin eye, clevis, trunnion, etc.)

Operating environment (temperature, corrosion risk, dust)

Specify Technical Parameters

Bore diameter and stroke

Working pressure (psi / bar)

Double-acting vs single-acting

Cushioning mechanism requirements

Material & Quality Assurance

Choose high-strength steel (chrome-plated rod if in corrosive or humid areas)

Ask for material certificates, testing reports (pressure test, fatigue, sealing)

Supplier Evaluation

OEM or custom capabilities

Quality certifications (ISO, CE, etc.)

After-sales support, documentation (technical manual, user safety sheet)

Logistics & Compliance

Shipping lead time, minimum order quantity (MOQ)

Packaging (protecting chromed rods), transport risks

Import compliance, duty, and standards in your country

Why Choose us?

As a Experienced manufacturers provide OEM-level customization, reliable specs, and a wide range of mounting options.

We maintain strict quality control, perform pressure tests, and can supply technical documentation (spec sheets, safety manuals).

We also help with design-for-manufacturability, reducing risk of incorrect dimensions, side loading, or long-term failure.