{"id":1744,"date":"2026-09-08T03:18:23","date_gmt":"2026-09-08T03:18:23","guid":{"rendered":"https:\/\/ever-powers.com\/?post_type=product&p=1744"},"modified":"2026-09-08T03:39:41","modified_gmt":"2026-09-08T03:39:41","slug":"hcyy11112021-crane-main-boom-luffing-hydraulic-cylinder","status":"publish","type":"product","link":"https:\/\/ever-powers.com\/nl\/product\/hcyy11112021-crane-main-boom-luffing-hydraulic-cylinder\/","title":{"rendered":"HCYY11112021 Crane Main Boom Luffing Hydraulic Cylinder \u2014 \u03a6280\u00d7\u03a6250\u00d73507 | 31.5 MPa"},"content":{"rendered":"
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SEO Keyword Strategy \u2014 HCYY11112021<\/h2>\n

Core Keyword:<\/strong> crane main boom luffing hydraulic cylinder<\/p>\n

Related Keywords:<\/strong> heavy duty boom cylinder for mobile crane \u00b7 crane boom lift cylinder \u00b7 hydraulic luffing cylinder \u00b7 main boom hydraulic actuator<\/p>\n

Long-Tail Keywords:<\/strong> replacement hydraulic cylinder for crane main boom \u00b7 heavy duty crane boom luffing cylinder 280mm bore \u00b7 mobile crane main boom cylinder installation dimension verification<\/p>\n<\/div>\n

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HCYY11112021 \u2014 Replacement Hydraulic Cylinder for Crane Main Boom Luffing Systems<\/h2>\n

The HCYY11112021 crane main boom luffing hydraulic cylinder<\/strong> is a heavy-duty hydraulic actuator engineered for the primary boom elevation function on mobile cranes. With a 280 mm cylinder bore, a 3,507 mm stroke, and a rated working pressure of 31.5 MPa, this cylinder belongs to the largest and most structurally demanding category of crane hydraulic components. Its function is to generate the linear force that drives the main boom through its full range of vertical travel \u2014 from the stowed, near-horizontal transport position through to the fully elevated working angle \u2014 and to hold the boom securely at any intermediate position under load.<\/p>\n

Engineers, crane maintenance managers, aftermarket procurement teams, and OEM integration buyers evaluating this cylinder should understand that a main-boom luffing cylinder is not merely a pressure vessel; it is a precision structural component whose bore, stroke, piston rod diameter, installation distance, mounting geometry, and port configuration must all be verified against the original crane design before any replacement or integration decision is made.<\/p>\n

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\"HCYY11112021<\/div>\n

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How a Heavy Duty Crane Boom Luffing Cylinder Generates Lifting Moment<\/h2>\n

The main boom luffing cylinder performs one of the most mechanically demanding tasks in crane operation. It does not lift the payload directly; instead, it generates a precisely controlled linear hydraulic force<\/strong> that acts through a lever arm formed by the distance between the cylinder’s line of action and the boom pivot point. This combination of linear force and geometric leverage produces the boom lifting moment<\/strong> that raises, holds, and lowers the main boom \u2014 and, by extension, the load suspended from its tip.<\/p>\n

Understanding this distinction is critical for engineers evaluating replacement cylinders. The relevant question is not simply “does this cylinder generate enough force?” but rather “does this cylinder, installed at the correct mounting geometry and operating at the design hydraulic pressure, generate sufficient moment about the boom pivot to handle the rated load at all operating angles?” A cylinder with an adequate pressure rating but an incorrect bore, incorrect stroke, or misaligned mounting position will fail to meet this requirement even if its raw pressure specification appears sufficient.<\/p>\n

The boom lifting moment varies continuously as the boom angle changes. At low boom angles \u2014 when the boom is nearly horizontal \u2014 the lever arm between the cylinder force line and the boom pivot tends to be shorter, and the component of gravitational load acting against the cylinder is at its maximum resolved value along the boom. The hydraulic system must supply its highest effective force at these unfavorable angles. As the boom rises toward vertical, the geometry changes and the cylinder force requirement typically decreases. Any replacement cylinder must preserve the original mounting positions precisely so that this geometric relationship remains correct throughout the full boom travel range.<\/p>\n

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\"HCYY11112021<\/div>\n

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Engineering Specifications for a Replacement Hydraulic Cylinder for Crane Main Boom<\/h2>\n

The following specifications are the authoritative source data for the HCYY11112021. Every parameter listed here must be verified against the original crane documentation and existing cylinder measurements before a replacement cylinder is ordered or produced.<\/p>\n

<\/p>\n

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Cylinder Bore<\/p>\n

\u03a6280 mm<\/p>\n

Piston bore diameter \u2014 determines effective piston area and theoretical extension force<\/p>\n<\/div>\n

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Piston Rod Diameter<\/p>\n

\u03a6250 mm<\/p>\n

Large rod-to-bore ratio contributes to column stability and resistance to buckling under compressive boom load<\/p>\n<\/div>\n

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Stroke<\/p>\n

3,507 mm<\/p>\n

Full travel of the piston rod \u2014 governs the angular range of boom elevation available to the crane<\/p>\n<\/div>\n

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Installation Distance<\/p>\n

4,218 mm<\/p>\n

Centre-to-centre pin distance at fully retracted condition \u2014 must match crane pivot geometry precisely<\/p>\n<\/div>\n

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Working Pressure<\/p>\n

31.5 MPa<\/p>\n

Normal continuous operating pressure \u2014 the pressure at which rated force output is achieved<\/p>\n<\/div>\n

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Max. Withstand Pressure<\/p>\n

39 MPa<\/p>\n

Peak structural pressure limit \u2014 not the recommended continuous operating pressure<\/p>\n<\/div>\n

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Cylinder Weight<\/p>\n

1,155 kg<\/p>\n

Shipping and installation planning weight \u2014 heavy lifting equipment required for field replacement<\/p>\n<\/div>\n

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Specification Format<\/p>\n

\u03a6280 \u00d7 \u03a6250 \u00d7 3507<\/p>\n

Bore \u00d7 Rod Diameter \u00d7 Stroke (mm)<\/p>\n<\/div>\n<\/div>\n

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\"HCYY11112021<\/div>\n

Fig. 1 \u2014 Dimensional CAD drawing for HCYY11112021. All replacement projects should be verified against the original crane drawing and the measured existing cylinder before production.<\/p>\n

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Mobile Crane Main Boom Cylinder Installation Dimension Verification \u2014 Why Each Parameter Matters<\/h2>\n

Each specification in the HCYY11112021 carries a direct engineering consequence. The following analysis explains why a technically informed buyer must treat each parameter as non-negotiable during replacement evaluation.<\/p>\n

Cylinder Bore: 280 mm<\/h3>\n

Piston bore determines the effective pressurized area and therefore the theoretical extension force available at a given hydraulic pressure. At 31.5 MPa working pressure, the theoretical extension force can be calculated as follows:<\/p>\n

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Effective piston area (A):<\/strong><\/p>\n

A = \u03c0 \u00d7 (0.280 m)\u00b2 \/ 4 = \u03c0 \u00d7 0.0784 \/ 4 \u2248 0.06158 m\u00b2<\/p>\n

Theoretical extension force (F) at working pressure (31.5 MPa):<\/strong><\/p>\n

F = P \u00d7 A = 31,500,000 Pa \u00d7 0.06158 m\u00b2 \u2248 1,940 kN (approximately 1.94 MN)<\/strong><\/p>\n

Note: This is a theoretical hydraulic force only. Actual available force will be lower due to hydraulic losses, seal friction, system pressure drops, and the effective pressure available at the cylinder port under dynamic load conditions. The boom lifting moment also depends on the cylinder mounting geometry and the perpendicular distance between the cylinder force line and the boom pivot axis \u2014 neither of which is a fixed constant across the boom travel range.<\/p>\n<\/div>\n

This scale of force \u2014 approaching 2 MN theoretical \u2014 reflects the structural demands placed on a crane main boom luffing cylinder. A replacement cylinder with a smaller bore would generate proportionally less force at the same pressure, which could result in inability to raise the boom at rated load or at low boom angles where the geometric disadvantage is greatest.<\/p>\n

Piston Rod Diameter: 250 mm<\/h3>\n

The 250 mm piston rod diameter relative to the 280 mm bore gives a rod-to-bore ratio of approximately 0.893. This unusually large ratio is not accidental. In a main-boom luffing cylinder, the extended piston rod experiences substantial compressive loading as it supports the boom moment, and it is subject to potential buckling if the rod cross-section is insufficient relative to the unsupported rod length. A large-diameter rod dramatically improves column stability \u2014 the rod’s resistance to lateral deflection under the combined compressive and bending loads that can arise from small amounts of misalignment or dynamic side loading during crane operation.<\/p>\n

This is particularly significant for a cylinder with a 3,507 mm stroke, because as the rod extends, the unsupported length increases and column stability becomes more critical. A replacement cylinder with a thinner piston rod may have an identical bore and pressure rating but a fundamentally different structural response under the compressive and eccentric loads present in the luffing application.<\/p>\n

Stroke: 3,507 mm<\/h3>\n

Stroke is one of the most frequently underestimated parameters in cylinder replacement projects. The stroke determines the total change in cylinder length between fully retracted and fully extended states, and this change maps directly to the available range of boom angular travel. A replacement cylinder with a stroke even 50\u2013100 mm shorter than the original will result in insufficient boom elevation range \u2014 the boom may not reach its intended maximum angle, or it may not fold down to the correct transport position, preventing the crane from meeting road-transport width and height restrictions.<\/p>\n

Conversely, a cylinder with a stroke longer than the original may cause mechanical over-travel \u2014 the boom could contact a physical stop before the cylinder reaches full extension, or the cylinder could reach maximum extension while the boom is still short of its mechanical end stop, creating uncontrolled load conditions. Stroke verification must be performed against the measured existing cylinder and the original crane OEM drawing, not solely against a nameplate or catalogue specification.<\/p>\n

Installation Distance: 4,218 mm<\/h3>\n

The installation distance of 4,218 mm represents the centre-to-centre distance between the cylinder’s mounting pivot pins at the fully retracted (closed) condition. This dimension governs where the cylinder sits within the crane boom geometry when the boom is at its stowed or minimum-angle position. If a replacement cylinder has an incorrect installation distance \u2014 even by a small margin \u2014 the cylinder will be either pre-loaded in tension or will sit proud of the crane frame when the boom is stowed, causing interference or preventing the boom from reaching its transport position. The CAD drawing supplied with this product provides the dimensional reference; however, the final confirmation must always come from the actual crane frame measurement or the original OEM engineering drawing.<\/p>\n

Working Pressure vs. Maximum Withstand Pressure<\/h3>\n

It is essential to distinguish between the 31.5 MPa working pressure<\/strong> and the 39 MPa maximum withstand pressure<\/strong>. Working pressure is the normal, continuous hydraulic operating pressure at which the cylinder is designed to perform its rated function. The maximum withstand pressure is a structural limit \u2014 a peak pressure that the cylinder body, end caps, seals, and rod assembly are designed to withstand without permanent deformation or catastrophic failure, but it is not<\/strong> recommended as a continuous operating pressure. Specifying a hydraulic system that routinely operates at or near 39 MPa on this cylinder would accelerate seal wear, increase the risk of fatigue failure at stress-concentration points, and reduce service life. The hydraulic system pressure-relief setting on the crane should be matched to the cylinder’s working pressure, not its maximum withstand pressure.<\/p>\n

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Crane Installation Location \u2014 Heavy Duty Crane Boom Luffing Cylinder Position and Alignment<\/h2>\n

The installation diagram below identifies the mounting position of the HCYY11112021 within the crane structure. The main-boom luffing cylinder is typically located between the crane superstructure turntable and the underside of the main boom body, with pin connections at both the boom-side and the superstructure-side mounting brackets.<\/p>\n

\"Crane<\/div>\n

Fig. 2 \u2014 Installation location diagram showing the position of the main boom luffing cylinder and associated crane hydraulic cylinders within the crane structure.<\/p>\n

In most mobile crane designs, the main boom luffing cylinder is installed in a roughly vertical or steeply inclined plane when the boom is near its working angles, transitioning toward a shallower angle as the boom approaches its transport position. The cylinder must therefore accommodate a continuously changing angle of attack relative to the boom pivot point throughout its full stroke. This variation in geometry means that the cylinder sees both the longitudinal compressive\/tensile loads along its axis and a small but real transverse component when the alignment between the cylinder axis and the boom linkage is not perfectly maintained. Ensuring that the mounting pin bores, bushing fits, and bracket alignments are correctly restored during replacement is as important as matching the dimensional parameters of the cylinder body itself.<\/p>\n

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Replacement Hydraulic Cylinder for Crane Main Boom \u2014 Dimensional Verification Protocol<\/h2>\n

Before requesting a quotation or approving production of a replacement cylinder, a systematic verification of all relevant dimensional and application parameters is essential. Dimensional compatibility on paper does not guarantee functional compatibility in service, and the consequences of an incorrect main-boom luffing cylinder on a mobile crane \u2014 in terms of both structural risk and operational downtime \u2014 are severe.<\/p>\n

The following verification sequence is recommended for engineers and procurement managers:<\/p>\n

    \n
  • Measure the existing cylinder physically.<\/strong> Record the bore (or confirm from a nameplate), the piston rod diameter, the stroke by measuring the extended and retracted lengths, and the pin-to-pin installation distance at the retracted position. Do not rely solely on the crane model’s general specification; individual crane units within the same model series may have been built with cylinder variants.<\/li>\n
  • Obtain the crane OEM drawing for this cylinder.<\/strong> The drawing specifies mounting pin diameters, lug widths, port thread sizes, port positions, required cleanliness level of hydraulic fluid, and any special surface treatments on the rod. These parameters are not listed in the commercial product specification but are critical to a functioning replacement.<\/li>\n
  • Confirm the hydraulic working pressure in service.<\/strong> If the crane has been modified, has a non-standard pump, or has had its relief valve adjusted, the actual operating pressure in service may differ from the original OEM design specification. The replacement cylinder specification must be matched to the actual operating pressure.<\/li>\n
  • Confirm the port configuration and thread standard.<\/strong> Hydraulic port positions and thread standards (metric, BSP, SAE, etc.) must match the existing hose routing and fittings precisely, or new hydraulic hose and fitting work will be required.<\/li>\n
  • Consider the operating environment.<\/strong> The rod coating specification, seal compound selection, and paint or protective-coating requirements should be discussed with the supplier in the context of the crane’s operating region, ambient temperature range, and exposure to water, salt air, or corrosive substances.<\/li>\n
  • Check the mounting pin diameters and bushing specifications.<\/strong> If the original mounting pins are worn or the lug bushings require replacement, this is an opportunity to address those items simultaneously. Installing a new cylinder with worn pins or deteriorated bushings will accelerate side loading damage on the new cylinder.<\/li>\n<\/ul>\n

    <\/p>\n

    Column Stability and Structural Alignment in a Heavy Duty Crane Boom Luffing Cylinder<\/h2>\n

    A cylinder with a 3,507 mm stroke and a 250 mm piston rod is a long, heavy structural member, and the engineering discipline of column stability \u2014 often described in terms of Euler buckling theory \u2014 is directly relevant to its application. When the piston rod is extended and the cylinder is under compressive loading (as it is when supporting the boom weight and payload), the rod behaves as a column. The tendency of this column to deflect laterally \u2014 to buckle \u2014 is a function of the rod’s diameter, its unsupported length, and the end-restraint conditions provided by the mounting pins.<\/p>\n

    The 250 mm rod diameter for a 3,507 mm stroke produces a slenderness ratio that is far more favorable than would be achieved with a thinner rod. This is likely a deliberate design decision by the original crane engineer. A buyer who considers substituting a version with a smaller rod diameter \u2014 for example, because a “standard” cylinder with the same bore and stroke but a thinner rod might appear cheaper \u2014 should understand that this would represent a structural downgrade, not merely an aesthetic difference.<\/p>\n

    Side loading is a related concern. A luffing cylinder is intended to operate in pure axial loading conditions \u2014 the force should be transmitted directly along the cylinder’s longitudinal axis. In practice, small angular misalignments at the mounting pins, manufacturing tolerances in the boom bracket, or dynamic effects during crane slewing or load swing introduce side loads. These side loads are borne by the piston rod and the rod-seal system. Ensuring that the crane’s mounting brackets are correctly aligned and that the mounting-pin bushings are in serviceable condition is part of correct cylinder installation and significantly reduces side-load induced seal and rod wear.<\/p>\n

    <\/p>\n

    Load Holding, Counterbalance Valves, and Crane Safety in the Main Boom Luffing Circuit<\/h2>\n

    The main boom luffing cylinder must hold the boom at any selected angle under the full rated load, including during hydraulic system engine-off periods and in the event of hydraulic line failure. This load-holding requirement is not a function of the cylinder body itself but of the counterbalance or load-holding valves that are fitted either directly to the cylinder’s hydraulic ports or immediately adjacent to them in the crane’s hydraulic circuit. These valves are a separate but critical component of the crane’s safety system.<\/p>\n

    When a replacement cylinder is being evaluated or produced, the port configuration \u2014 specifically the port size, position, thread form, and the ability to mount the correct load-holding valve manifold \u2014 must be confirmed against the crane’s hydraulic circuit design. A cylinder body that accepts fluid efficiently but does not interface correctly with the counterbalance valve assembly creates a genuine safety risk and will require hydraulic circuit modification before the crane can return to service.<\/p>\n

    Buyers should specifically confirm the port thread standard (metric, BSP, or SAE), port position (head-end and rod-end locations relative to mounting references), and any manufacturer’s requirements for valve mounting adapter interfaces before approving a replacement cylinder for production.<\/p>\n

    <\/p>\n

    Inspection and Maintenance Considerations for the Crane Main Boom Hydraulic Actuator<\/h2>\n

    A crane main boom luffing cylinder of this size operates in a demanding environment of high pressure, dynamic loading, and exposure to the elements, and it requires systematic inspection and maintenance to achieve its intended service life. The following inspection points are relevant to both the original cylinder’s end-of-life assessment and to the management of a replacement unit after installation.<\/p>\n

      \n
    • Piston rod surface condition:<\/strong> The rod surface \u2014 which slides through the rod seal and guide bush on every boom cycle \u2014 must be free of scoring, pitting, impact damage, and corrosion. Rod surface damage is one of the primary causes of premature seal failure. Inspect the exposed rod surface for chrome layer delamination, impact damage from debris, and corrosion pits, particularly in the wiper-seal contact zone.<\/li>\n
    • Weld inspections:<\/strong> The cylinder body end cap welds, trunnion welds, and any bracket welds should be inspected for surface cracks at the specified crane service intervals. This is particularly important on a cylinder that has experienced shock loading or has been operated on a crane that has exceeded its rated capacity.<\/li>\n
    • Mounting-pin and bushing wear:<\/strong> Excessive pin and bushing clearance causes the cylinder to operate under side-load conditions for which it was not designed. Inspect the lug bore diameter and pin diameter at both ends, and replace bushings before clearance exceeds the crane manufacturer’s tolerance.<\/li>\n
    • Seal and hydraulic-fluid condition:<\/strong> Visible external oil seepage around the rod seal or from port connections, discoloration of hydraulic fluid, or increased system contamination level are early indicators of cylinder condition changes. Addressing these early is far less costly than a cylinder rebuild or replacement.<\/li>\n
    • Internal inspection and seal replacement:<\/strong> Seals in a high-pressure hydraulic cylinder operating under dynamic load have a finite life. The timing of seal replacement should follow the crane manufacturer’s service schedule or be assessed based on operating hours, observed seepage, and hydraulic oil analysis results.<\/li>\n<\/ul>\n

      <\/p>\n

      OEM Integration and Procurement Guidance for Replacement Hydraulic Cylinder for Crane Main Boom Applications<\/h2>\n

      Procurement managers and OEM integration engineers working with the HCYY11112021 should approach the procurement process as an engineering evaluation rather than a catalogue purchase. At 1,155 kg and with the structural responsibilities described above, this cylinder cannot be treated as an interchangeable commodity item.<\/p>\n

      For aftermarket replacement projects, the supplier should be provided with the complete information set described in the buyer checklist below. In OEM or bulk-order scenarios where new cranes are being produced or a fleet of cranes requires a consistent cylinder specification, an engineering drawing exchange process \u2014 supplier providing a pre-production dimensional drawing for buyer confirmation before manufacturing begins \u2014 is strongly recommended. This step prevents costly rework, ensures dimensional traceability, and provides a quality reference for incoming inspection.<\/p>\n

      Private-label and white-label buyers should additionally confirm the required markings, paint specification, and any shipping protection requirements relevant to the crane model or the customer’s own branding and documentation standards.<\/p>\n

      <\/p>\n

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      Technical Information Checklist \u2014 Heavy Duty Crane Boom Luffing Cylinder Inquiry<\/h2>\n

      Providing the following information when submitting your inquiry will enable a prompt and accurate engineering response:<\/p>\n

      \n
      Crane make, model, and year of manufacture<\/div>\n
      Original cylinder model number or nameplate<\/div>\n
      Photographs of existing cylinder, both ends and nameplate<\/div>\n
      Measured bore diameter and piston rod diameter<\/div>\n
      Measured stroke and installation distance<\/div>\n
      Mounting pin diameter at head and rod end<\/div>\n
      Lug or clevis width at both mounts<\/div>\n
      Hydraulic port thread form, size, and position<\/div>\n
      Rated hydraulic working pressure in service<\/div>\n
      OEM engineering drawing (if available)<\/div>\n
      Operating environment and temperature range<\/div>\n
      Required quantity and delivery schedule<\/div>\n<\/div>\n<\/div>\n

      <\/p>\n

      Frequently Asked Questions \u2014 Replacement Hydraulic Cylinder for Crane Main Boom<\/h2>\n
      \n
      \n

      Can the HCYY11112021 be evaluated as a replacement for an existing crane main boom cylinder?<\/h3>\n

      This cylinder can be evaluated as a potential replacement where the specified bore, rod diameter, stroke, installation distance, working pressure, and mounting geometry are confirmed to match the crane’s original design requirements. Compatibility cannot be guaranteed solely from the dimensional data presented here; it must be confirmed against the crane’s OEM engineering drawing and the measured existing cylinder. Rod coating specification, seal compound, port configuration, and mounting details should all be verified before production approval.<\/p>\n<\/div>\n

      \n

      Why is the piston rod diameter (250 mm) nearly as large as the bore (280 mm)?<\/h3>\n

      The large rod-to-bore ratio is a deliberate engineering response to the column stability requirements of a 3,507 mm stroke cylinder operating under high compressive loads. When the piston rod is extended and the cylinder is supporting boom weight under load, the rod behaves as a structural column. A large-diameter rod has substantially greater resistance to lateral deflection (buckling) at the extended lengths required by this application. Buyers should not assume that a thinner rod with the same bore and pressure rating would be structurally equivalent.<\/p>\n<\/div>\n

      \n

      Is the 39 MPa maximum withstand pressure the normal operating pressure I should set on my crane?<\/h3>\n

      No. The 39 MPa maximum withstand pressure is a structural limit \u2014 the maximum pressure at which the cylinder body, end caps, and seals are designed to withstand without permanent deformation or catastrophic failure. It is not the recommended continuous operating pressure. The hydraulic circuit should be configured to operate at the 31.5 MPa rated working pressure. Operating routinely at or near the maximum withstand pressure accelerates seal deterioration, increases fatigue loading on structural welds and end cap connections, and reduces service life.<\/p>\n<\/div>\n

      \n

      Why can’t I simply match the bore and pressure rating to find a compatible replacement?<\/h3>\n

      Two cylinders with identical bore diameter and pressure rating can be mechanically incompatible in a crane luffing application if their stroke, installation distance, piston rod diameter, mounting pin diameter, port position, or port thread differ from the original. The stroke governs boom travel range; the installation distance governs where the cylinder sits in the crane geometry at the stowed position; the rod diameter governs column stability; the port configuration governs compatibility with the load-holding valve system. All parameters must match, not merely bore and pressure.<\/p>\n<\/div>\n

      \n

      What causes premature seal failure in a crane main boom luffing cylinder?<\/h3>\n

      The most common causes include operating at or above the maximum withstand pressure, side loading due to misaligned mounting brackets or worn pin bushings, rod surface damage from impact or corrosion that abrades the rod seal during operation, hydraulic fluid contamination that introduces abrasive particles into the seal contact zone, and thermal cycling in environments with large daily temperature variations. Addressing mounting alignment and bushing condition during installation, and maintaining clean hydraulic fluid, are the most effective preventive measures available to the operator.<\/p>\n<\/div>\n

      \n

      Can the installation distance and stroke be modified for a custom crane design?<\/h3>\n

      Custom modifications to stroke and installation distance may be possible for OEM integration projects involving new crane designs or significant redesigns. Buyers interested in custom-dimensioned cylinders should submit their crane design geometry, intended operating pressure, and load requirements for engineering review. A pre-production CAD drawing approval process is strongly recommended for any custom variant.<\/p>\n<\/div>\n<\/div>\n

      <\/p>\n

      \n

      Request Technical Evaluation for the HCYY11112021 Crane Main Boom Luffing Cylinder<\/p>\n

      Send us your crane model, existing cylinder nameplate, photographs, measured dimensions, or OEM engineering drawing. Our engineering team will review your replacement or OEM integration requirements and provide a technical assessment, dimensional drawing for confirmation, and a commercial quotation.<\/p>\n

      \n
      \ud83d\udcd0 Send Your OEM Drawing<\/div>\n
      \ud83d\udcf7 Send Cylinder Photos<\/div>\n
      \ud83d\udccb Request Dimensional Drawing<\/div>\n
      \ud83d\udce6 Ask About Bulk OEM Orders<\/div>\n<\/div>\n

      Request a Quotation \u2192<\/a><\/p>\n

      Engineering review \u00b7 Pre-production drawing confirmation \u00b7 OEM and bulk order support available<\/p>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"

      Heavy-duty crane main boom luffing hydraulic cylinder, \u03a6280\u00d7\u03a6250\u00d73507mm, 31.5MPa working pressure, 1,155kg. Engineered for truck crane boom elevation. Request dimensional drawing and OEM quotation.<\/p>","protected":false},"featured_media":1725,"template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[114],"product_tag":[],"class_list":["post-1744","product","type-product","status-publish","has-post-thumbnail","product_cat-crane-hydraulic-cylinder","first","instock","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/ever-powers.com\/nl\/wp-json\/wp\/v2\/product\/1744","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ever-powers.com\/nl\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/ever-powers.com\/nl\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ever-powers.com\/nl\/wp-json\/wp\/v2\/media\/1725"}],"wp:attachment":[{"href":"https:\/\/ever-powers.com\/nl\/wp-json\/wp\/v2\/media?parent=1744"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/ever-powers.com\/nl\/wp-json\/wp\/v2\/product_brand?post=1744"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/ever-powers.com\/nl\/wp-json\/wp\/v2\/product_cat?post=1744"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/ever-powers.com\/nl\/wp-json\/wp\/v2\/product_tag?post=1744"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}