{"id":2304,"date":"2026-06-29T06:18:10","date_gmt":"2026-06-29T06:18:10","guid":{"rendered":"https:\/\/hydrauliccylindersprice.com\/?post_type=product&p=2304"},"modified":"2026-06-29T06:18:10","modified_gmt":"2026-06-29T06:18:10","slug":"new-arrival-double-acting-dump-truck-telescopic-hydraulic-cylinder-for-sale","status":"publish","type":"product","link":"https:\/\/hydrauliccylindersprice.com\/sk\/product\/new-arrival-double-acting-dump-truck-telescopic-hydraulic-cylinder-for-sale\/","title":{"rendered":"New Arrival Double Acting Dump Truck Telescopic Hydraulic Cylinder For Sale"},"content":{"rendered":"
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<\/p>\n

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SYSTEM INTEGRATION GUIDE<\/span>
\nDOUBLE ACTING \u00b7 DUMP TRUCK<\/span><\/div>\n
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Double Acting Telescopic
\nHydraulic Cylinder
\nDump Truck \u2014 System Integration<\/span><\/h2>\n

The double acting telescopic cylinder<\/a> is one component in a hydraulic circuit. It cannot operate without the correct control valve, adequate pump flow, properly sized hoses, and a reservoir with sufficient fluid capacity. This page covers the complete system \u2014 everything that surrounds the cylinder and must be correctly specified for reliable bi-directional dump truck operation.<\/p>\n<\/div>\n

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Acting<\/span>Double<\/span><\/div>\n
Bore<\/span>2\u20136\u2033<\/span><\/div>\n
Stroke<\/span>4\u2013100\u2033<\/span><\/div>\n
Guide<\/span>Full System<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

Many buyers focus entirely on the telescopic cylinder specification \u2014 bore, stroke, stage count \u2014 and overlook the hydraulic system that drives it. A correctly specified cylinder installed on an incorrectly specified hydraulic circuit will not perform as expected: too little pump flow makes the tipping speed unacceptably slow; the wrong valve type prevents retraction; undersized hoses create pressure drops that reduce force; and insufficient reservoir capacity causes overheating. This page provides the system integration knowledge needed to match the cylinder to the circuit.<\/p>\n<\/section>\n

\"New<\/p>\n

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Double Acting Dump Truck Cylinder \u2014 Customisation Parameters<\/h2>\n
\n\n\n\n\n\n\n\n
Acting Type<\/td>\nDouble-acting (hydraulic extend + retract)<\/td>\n<\/tr>\n
Bore \/ Rod \/ Stroke \/ Pin<\/td>\n2\u20136\u2033 \/ 1.125\u20134\u2033 \/ 4\u2013100\u2033 \/ 0.5\u20132\u2033 (all customisable)<\/td>\n<\/tr>\n
Port Options<\/td>\nG \/ SAE \/ NPT \/ M \u2014 two ports<\/td>\n<\/tr>\n
Body \/ Certification<\/td>\nSteel \/ ISO 9001 \/ 100% dual-circuit tested<\/td>\n<\/tr>\n
Lead Time \/ Warranty<\/td>\n25\u201335 days \/ 1 year<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n

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\"Double<\/section>\n

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The Complete Hydraulic Circuit \u2014 Four Components That Must Match the Cylinder<\/h2>\n

A double-acting dump truck telescopic cylinder operates within a hydraulic circuit consisting of four key components beyond the cylinder itself. Each must be correctly specified \u2014 an error in any one component can prevent the entire system from working correctly.<\/p>\n

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1. Directional Control Valve<\/strong><\/p>\n

Double-acting requires a 4-way, 3-position (4\/3) directional control valve. The three positions are: extend (pressure to extend port, return from retract port), retract (pressure to retract port, return from extend port), and neutral (both ports blocked or floating). Single-acting uses a simpler 3-way valve. If your truck currently has a 3-way valve and you are upgrading to a double-acting cylinder, the valve must be replaced or a second valve section added.<\/p>\n<\/div>\n

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2. Hydraulic Pump<\/strong><\/p>\n

The pump must deliver sufficient flow (litres per minute) at adequate pressure (bar or PSI) to extend the cylinder at the desired tipping speed. Flow determines speed; pressure determines force. A larger bore cylinder requires more flow to extend at the same speed as a smaller bore. The pump pressure rating must exceed the system working pressure by a margin \u2014 typically the pump relief valve is set 10\u201315% above the cylinder’s rated working pressure to ensure the cylinder operates at full force.<\/p>\n<\/div>\n

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3. Hydraulic Hoses<\/strong><\/p>\n

Double-acting requires two hose lines \u2014 one for extend, one for retract. The hose internal diameter must be large enough to carry the pump flow without excessive pressure drop. Undersized hoses create friction losses that reduce the effective pressure at the cylinder \u2014 the dump body rises more slowly and with less force than the pump output should provide. The hose pressure rating must match or exceed the system relief valve setting. Both hoses must be correctly routed to avoid chafing, kinking, or contact with hot exhaust components.<\/p>\n<\/div>\n

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4. Hydraulic Reservoir<\/strong><\/p>\n

The reservoir must hold enough hydraulic fluid to fill the cylinder at full extension plus maintain a minimum level above the pump suction port. A telescopic cylinder displaces a significant oil volume \u2014 a 4-inch bore, 4-stage cylinder at 80-inch stroke displaces approximately 6\u20138 litres. The reservoir must accommodate this volume swing without running dry on the extend stroke or overflowing on the retract stroke. Undersized reservoirs cause pump cavitation (air ingestion) on the extend stroke and fluid overheating due to insufficient cooling time.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

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Tipping Speed \u2014 How Pump Flow, Bore Size, and Stage Count Interact<\/h2>\n

The speed at which the dump body rises is determined by how quickly hydraulic fluid fills the cylinder \u2014 and this is a relationship between pump flow rate and cylinder bore area. Understanding this relationship helps you match the pump to the cylinder for the tipping speed your operation requires.<\/p>\n

\"Dump<\/p>\n

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Extension speed = Flow \u00f7 Bore area<\/strong><\/p>\n

The extension speed of each stage equals the pump flow rate divided by the piston area of that stage. A larger bore has a larger piston area, so it extends more slowly at the same flow rate. The first stage (largest bore) extends the slowest; the last stage (smallest bore) extends the fastest. If the tipping speed is too slow, either increase the pump flow or reduce the bore (which also reduces force \u2014 a trade-off).<\/p>\n<\/div>\n

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Retract speed = Flow \u00f7 Annular area<\/strong><\/p>\n

On the retract stroke, the flow fills the annular area (bore area minus rod area), which is smaller than the full bore area. This means the retract speed is faster than the extend speed at the same flow rate. On a dump truck, this translates to the body lowering faster than it rises \u2014 which is usually acceptable, but if the lowering speed must be controlled, a flow control valve on the retract circuit provides metering.<\/p>\n<\/div>\n<\/div>\n

Practical example: <\/strong>
\nA 4-inch bore first stage has a piston area of approximately 81 cm\u00b2. At 20 litres\/minute pump flow (333 cm\u00b3\/second), the first stage extends at approximately 333 \u00f7 81 = 4.1 cm\/second = 2.5 metres\/minute. If a faster tipping speed is required, increase the pump displacement or use a smaller bore (which produces less force). This speed calculation applies to all telescopic hydraulic cylinders<\/a>, not just dump truck configurations.<\/span><\/div>\n<\/section>\n

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Valve Centre Position \u2014 Closed Centre vs Float Centre for Dump Truck Operation<\/h2>\n

The 4-way directional control valve has three positions: extend, retract, and centre (neutral). The behaviour of the centre position determines how the dump body behaves when the driver releases the control lever \u2014 and the wrong centre position choice can create a safety hazard.<\/p>\n

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Closed centre \u2014 body holds position<\/strong><\/p>\n

When the valve returns to centre, both cylinder ports are blocked \u2014 hydraulic fluid is trapped in both the extend and retract chambers. The dump body holds its current tipping angle. This is the standard choice for dump trucks where the driver needs to stop the body at a partial tipping angle (for metered discharge or inspection). The body will not move until the driver actively selects extend or retract.<\/p>\n<\/div>\n

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Float centre \u2014 body free-falls under gravity<\/strong><\/p>\n

When the valve returns to centre, both ports are connected to the return line \u2014 fluid flows freely in and out of the cylinder. The dump body is free to move under gravity, which means it will lower by itself if it is above horizontal. Float centre is used when the driver wants the body to automatically lower to horizontal when the lever is released. This is convenient for rapid cycle operations but provides no holding capability \u2014 the body cannot be stopped at a partial angle.<\/p>\n<\/div>\n<\/div>\n

Safety note: <\/strong>
\nNever use float centre on a dump truck that may have personnel working under a raised dump body. Float centre allows the body to lower without warning if the valve shifts to neutral. Closed centre provides a hydraulic lock that holds the body in position. For maintenance access under a raised body, always use mechanical safety props in addition to the hydraulic hold \u2014 regardless of valve type.<\/span><\/div>\n<\/section>\n

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OEM & ODM \u2014 Cylinder + System Specification Support<\/h2>\n

When you order a double-acting telescopic cylinder from Korea Ever-Power, the engineering team can also advise on the supporting hydraulic system components \u2014 valve type, pump flow requirements, hose sizing, and reservoir capacity. This system-level support is part of the manufacturer-direct relationship: the people who build the cylinder understand the system it operates in.<\/p>\n

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What You Provide<\/h3>\n<\/div>\n
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Cylinder specs (bore, rod, stroke, stages, acting type, ports) plus system context: pump type and flow rate, existing valve model, hose sizes, reservoir capacity, desired tipping speed, and dump truck model. The more system context you provide, the more precisely the engineering team can verify compatibility and flag potential issues before production.<\/p>\n<\/div>\n<\/div>\n

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What the Factory Delivers<\/h3>\n<\/div>\n
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Drawing 2\u20133 days. System compatibility review on request. Samples available. Production 25\u201335 days. 100% dual-circuit pressure test with certificate. 1-year warranty. Browse other industrial hydraulic cylinder products<\/a> for your complete fleet requirements.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n

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Hydraulic System Integration \u2014 FAQ<\/h2>\n
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My dump truck tips too slowly \u2014 is the cylinder undersized or the pump?<\/h3>\n

Usually the pump. The cylinder’s bore determines force, not speed. Speed is determined by how fast the pump fills the cylinder bore area. If the tipping speed is unacceptable, check the pump flow rate first \u2014 it may be insufficient for the cylinder bore. Also check for restrictions in the hose lines, filter, and control valve that reduce the effective flow reaching the cylinder. A partially clogged filter or an undersized valve can reduce tipping speed by 30\u201350%.<\/p>\n<\/div>\n

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What hose size do I need for a 4-inch bore double-acting telescopic cylinder?<\/h3>\n

Hose size depends on the pump flow rate, not just the cylinder bore. As a general guideline, the hose internal diameter should maintain a fluid velocity below approximately 6 metres\/second for pressure lines and 3 metres\/second for return lines. At 20 litres\/minute, a 1\/2-inch (12.7 mm ID) hose maintains approximately 2.6 m\/s \u2014 well within limits. At 40 litres\/minute, a 3\/4-inch hose is appropriate. Always confirm with a hydraulic hose sizing calculation or consult your hose supplier.<\/p>\n<\/div>\n

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How large should the hydraulic reservoir be?<\/h3>\n

The reservoir must hold the full cylinder displacement volume plus a minimum operating reserve above the pump suction port. A common guideline for mobile hydraulic systems is that the reservoir capacity should be at least 2\u20133 times the pump flow rate per minute (for cooling) plus the cylinder displacement volume. For a dump truck with a 4-inch bore, 4-stage, 80-inch stroke cylinder displacing approximately 6\u20138 litres, and a 20 L\/min pump, a 50\u201360 litre reservoir is typical.<\/p>\n<\/div>\n

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Can Korea Ever-Power supply the valve, pump, and hoses as well as the cylinder?<\/h3>\n

Korea Ever-Power’s core manufacturing capability is hydraulic cylinders \u2014 including telescopic, welded, and tie-rod types for forklifts<\/a>, aerial work vehicles<\/a>, and dump trucks. The factory can recommend compatible valve, pump, and hose specifications for your system, but these components are typically sourced from their respective specialist manufacturers. The engineering team will provide the flow, pressure, and port specifications needed so you can order the supporting components from your preferred hydraulic component supplier.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

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Field Reports<\/h2>\n
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T<\/div>\n
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Thomas G. \u2014 Dump Truck System Integrator<\/div>\n
Verified Purchase \u00b7 Netherlands \u00b7 April 2025<\/div>\n<\/div>\n
\u2605\u2605\u2605\u2605\u2605<\/div>\n<\/div>\n

We design complete dump truck hydraulic systems \u2014 cylinder, valve, pump, reservoir, hoses, and controls. The Ever-Power engineering team provided the cylinder displacement data and port flow coefficients that we needed to model the circuit before ordering. This system-level technical support is rare from cylinder suppliers \u2014 most just provide bore and stroke. The double-acting 4-stage, 5-inch bore we ordered matched the circuit model precisely: the tipping speed on site was within 5% of our calculated prediction. 8 complete systems installed, all performing to specification.<\/p>\n<\/div>\n

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R<\/div>\n
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Ricardo P. \u2014 Fleet Upgrade Contractor<\/div>\n
Verified Purchase \u00b7 Brazil \u00b7 March 2025<\/div>\n<\/div>\n
\u2605\u2605\u2605\u2605\u2606<\/div>\n<\/div>\n

Upgraded 3 dump trucks from single-acting to double-acting. The cylinder replacement was straightforward, but I underestimated the system changes needed: had to replace the 3-way valves with 4-way, add retract hose lines, and enlarge the reservoir on one truck that was running marginal oil capacity. Four stars because the total conversion cost was about 40% more than the cylinder price alone \u2014 the system components added up. The system integration guidance on this page would have helped me budget the complete conversion more accurately. The cylinders themselves are excellent \u2014 smooth bi-directional operation on all 3 trucks.<\/p>\n<\/div>\n

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A<\/div>\n
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Anna L. \u2014 Municipal Fleet Engineer<\/div>\n
Verified Purchase \u00b7 Sweden \u00b7 February 2025<\/div>\n<\/div>\n
\u2605\u2605\u2605\u2605\u2605<\/div>\n<\/div>\n

We specified closed-centre valves on our municipal dump trucks following the safety guidance \u2014 personnel occasionally work adjacent to raised dump bodies during salt loading in winter. The closed centre hydraulic lock holds the body securely at any angle. The Ever-Power double-acting cylinder paired with a Bosch-Rexroth 4\/3 closed-centre valve provides exactly the behaviour we need: body stays where the operator puts it, no drift, no unintended lowering. The system integration information helped our specification engineer select the correct valve centre position before ordering.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

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Other Hydraulic Cylinder Categories<\/h2>\n
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\"Forklift\"<\/p>\n

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Forklift Hydraulic Cylinder Range \u2192<\/a><\/h3>\n

Lift, tilt, steer, and accessory cylinders. HCYY OEM parts available.<\/p>\n<\/div>\n<\/div>\n

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\"AWV\"<\/p>\n

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Aerial Platform Hydraulic Cylinders \u2192<\/a><\/h3>\n

15 cylinder types for scissor lifts and boom lifts.<\/p>\n<\/div>\n<\/div>\n

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\"All\"<\/p>\n

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Hydraulic Cylinder Pricing & Full Catalogue \u2192<\/a><\/h3>\n

Welded, tie-rod, telescopic, and custom cylinders \u2014 complete range.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<\/div>","protected":false},"excerpt":{"rendered":"

New arrival double acting telescopic hydraulic cylinder for dump trucks \u2014 with a complete hydraulic system integration guide. A double-acting telescopic cylinder does not work in isolation: it requires a compatible control valve, adequate pump flow, correct hose sizing, and proper circuit design to deliver reliable bi-directional operation. This page covers the system integration \u2014 what surrounds the cylinder and how everything must work together.<\/div>","protected":false},"featured_media":2272,"comment_status":"open","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[851],"product_tag":[],"class_list":["post-2304","product","type-product","status-publish","has-post-thumbnail","product_cat-telescopic-hydraulic-cylinder","first","instock","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/hydrauliccylindersprice.com\/sk\/wp-json\/wp\/v2\/product\/2304","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hydrauliccylindersprice.com\/sk\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/hydrauliccylindersprice.com\/sk\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/hydrauliccylindersprice.com\/sk\/wp-json\/wp\/v2\/comments?post=2304"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hydrauliccylindersprice.com\/sk\/wp-json\/wp\/v2\/media\/2272"}],"wp:attachment":[{"href":"https:\/\/hydrauliccylindersprice.com\/sk\/wp-json\/wp\/v2\/media?parent=2304"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/hydrauliccylindersprice.com\/sk\/wp-json\/wp\/v2\/product_brand?post=2304"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/hydrauliccylindersprice.com\/sk\/wp-json\/wp\/v2\/product_cat?post=2304"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/hydrauliccylindersprice.com\/sk\/wp-json\/wp\/v2\/product_tag?post=2304"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}