{"id":456,"date":"2025-06-18T07:46:29","date_gmt":"2025-06-18T07:46:29","guid":{"rendered":"https:\/\/single-acting-hydraulic-cylinder.com\/product\/dump-trailer-telescopic-cylinder\/"},"modified":"2025-06-19T02:25:36","modified_gmt":"2025-06-19T02:25:36","slug":"dump-trailer-telescopic-cylinder","status":"publish","type":"product","link":"https:\/\/single-acting-hydraulic-cylinder.com\/fr\/product\/dump-trailer-telescopic-cylinder\/","title":{"rendered":"Dump Trailer Telescopic Cylinder"},"content":{"rendered":"

Dump trailer telescopic cylinders are crucial components of dump trucks, primarily responsible for managing the unloading process. These cylinders use a hydraulic system to provide the necessary force, allowing the truck to discharge its load efficiently. The telescopic cylinder for dump trailers features a multi-stage hydraulic design that enables extended lifting while being compact during retraction. This innovative structure makes it the preferred option for lifting systems in dump trailers, especially in scenarios demanding high lift angles and the ability to carry heavy loads. Our telescoping hydraulic cylinders for dump trailers are constructed from high-strength steel and include precision sealing technologies, ensuring reliability and longevity, even in challenging operational conditions.<\/p>\n

\"Dump<\/p>\n

Telescopic Cylinder for Dump Trailer Specification<\/strong><\/h2>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Parameter<\/td>\nSpecification\/Description<\/td>\n<\/tr>\n
Bore Size<\/td>\n2\u20136 inch (50.8\u2013152.4 mm)<\/td>\n<\/tr>\n
Rod Size<\/td>\n1.125\u20134 inch (28.6\u2013101.6 mm)<\/td>\n<\/tr>\n
Stroke Size<\/td>\n6\u201348 inch (152.4\u20131219.2 mm)<\/td>\n<\/tr>\n
Pin Size<\/td>\n0.5\u20132 inch (12.7\u201350.8 mm)<\/td>\n<\/tr>\n
Ports<\/td>\nG (BSP), SAE, NPT, M (Metric)<\/td>\n<\/tr>\n
Working Pressure<\/td>\n2000\u20134000 PSI (13.8\u201327.6 MPa)<\/td>\n<\/tr>\n
Number of Stages<\/td>\n2\u20139 stages<\/td>\n<\/tr>\n
Lifting Capacity<\/td>\n5\u2013100 tons (depending on bore size and pressure)<\/td>\n<\/tr>\n
Material<\/td>\nHigh-strength seamless steel (optional aluminum alloy for lightweight models)<\/td>\n<\/tr>\n
Mounting Type<\/td>\nFront-end, underbody, or custom mounting (e.g., trunnion, clevis, or flange)<\/td>\n<\/tr>\n
Operating Temperature<\/td>\n-30\u00b0C to 80\u00b0C (-22\u00b0F to 176\u00b0F)<\/td>\n<\/tr>\n
Seal Type<\/td>\nPolyurethane, nitrile rubber, or composite seals (resistant to wear and oil)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/div><\/span><\/h2>\n

Main Structure Composition of Telescopic Dump Trailer Cylinder<\/strong><\/h2>\n
\n
\n\n\n\n\n\n\n
Base Cylinder\/Barrel<\/strong><\/td>\nSleeves<\/strong><\/td>\nPiston and Seals<\/strong><\/td>\nGuide Rings and Support Rings<\/strong><\/td>\n<\/tr>\n
The base cylinder is the outermost fixed part, typically attached to the chassis or frame of the dump trailer.
\nMaterial:<\/strong> High-strength steel or aluminum alloy, designed to endure hydraulic pressure and external stresses.
\nFunction:<\/strong> Provides structural integrity and houses the telescopic sleeves within.<\/td>\n		The sleeves consist of multiple concentric tubes with decreasing diameters that nest within one another, usually ranging from 2 to 9 stages based on stroke requirements.
\nEach sleeve serves as both a piston and a hydraulic chamber, with the top of the upper stage sleeve functioning as the driving surface for the next stage.
\nMaterial:<\/strong> Made from high-strength seamless steel, often treated with chrome plating for enhanced durability.
\nFunction:<\/strong> Allows extended travel while taking up minimal space during retraction.<\/td>\n		Each sleeve has a piston at the bottom, forming a sealed hydraulic chamber with the upper stage sleeve.
\nSeals can include O-rings, polyurethane rings, or composite seals, effectively preventing hydraulic oil leakage.
\nFunction:<\/strong> Ensures effective pressure transfer between chambers while keeping the cylinder sealed.<\/td>\n		Guide and support rings are positioned between the sleeve walls to minimize friction and prevent misalignment during movement.
\nMaterial:<\/strong> Composed of nylon, PTFE, or other wear-resistant materials.
\nFunction:<\/strong> Enhances stability during operation and extends the lifespan of the cylinder.<\/td>\n<\/tr>\n
Hydraulic Ports<\/strong><\/td>\nEnd Cap and Mountings<\/strong><\/td>\nCushioning Mechanism<\/strong><\/td>\n<\/td>\n<\/tr>\n
Hydraulic ports are located on the outer cylinder or specific sleeves, connecting to the hydraulic system for oil input and discharge.
\nCommon configuration:<\/strong> Single-acting cylinders have one oil inlet (retracting via gravity); double-acting cylinders feature an inlet and outlet for hydraulic control.
\nFunction:<\/strong> Manages hydraulic oil flow, facilitating sleeve extension.<\/td>\n		The end cap seals the top of the outer cylinder, preventing dust ingress, and secures internal components.
\nConnectors (like hinged or ball heads) facilitate attachment to the trailer or chassis.
\nFunction:<\/strong> Ensures reliable connections and movement flexibility between the cylinder and trailer.<\/td>\n		Higher-end cylinders may include buffering structures (throttle holes or pads) at extension limits.
\nFunction:<\/strong> Softens impacts at the end of extension, protecting the cylinder and trailer.<\/td>\n		\"Dump<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/article>\n

<\/div><\/span><\/h2>\n

Working Principle of Dump Trailer Telescopic Cylinders<\/strong><\/h2>\n

The working principle of a dump truck’s telescopic sleeve hydraulic cylinder relies on the hydraulic oil pressure to push the piston, facilitating the extension and retraction of the telescopic sleeve. In practice, hydraulic oil is drawn into the cylinder via a pump, causing the piston to move forward and extend the sleeve. To retract, hydraulic oil flow is redirected by a valve, making the piston slide back, thus retracting the sleeve. The hydraulic pump generates pressure, while the hydraulic valve regulates oil flow direction, enabling the piston to move back and forth. Seals within the cylinder are vital, preventing leaks and ensuring system functionality. During unloading, multi-stage telescopic cylinders operate in conjunction with hydraulic pumps, check valves, and switches. Together, these components enable the trailer to tilt forward, activate the cylinder, and retract, making the unloading process safer and more efficient.<\/p>\n