{"id":892,"date":"2026-09-04T03:58:34","date_gmt":"2026-09-04T03:58:34","guid":{"rendered":"https:\/\/steeringcylinder.top\/?post_type=product&p=892"},"modified":"2026-09-04T07:21:38","modified_gmt":"2026-09-04T07:21:38","slug":"boom-extension-cylinder-hcyy11112009","status":"publish","type":"product","link":"https:\/\/steeringcylinder.top\/sv\/produkt\/boom-extension-cylinder-hcyy11112009\/","title":{"rendered":"Main Boom Extension Cylinder for Telescopic Boom Lift \u03a6110\u00d7\u03a675\u00d7815"},"content":{"rendered":"
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Aerial Work Vehicles \u00b7 Hydraulic Cylinders \u00b7 UK Supply<\/p>\n

Main Boom Extension Cylinder for Telescopic Boom Lifts<\/h2>\n

Designed for the demanding operating cycles of telescopic boom platforms, this main boom extension cylinder \u2014 model HCYY11112009, \u03a6110\u00d7\u03a675\u00d7815mm \u2014 delivers consistent, leak-free extension force at 23MPa working pressure, rated to withstand burst loads up to 34MPa. Whether you are a plant hire operator in Manchester, a construction equipment distributor in Birmingham, or a specialist aerial work platform manufacturer across the UK, this cylinder is engineered to keep your fleet productive and your downtime figures low.<\/p>\n

Get a Quote \u2014 sales@steeringcylinder.top<\/a><\/p>\n<\/div>\n<\/div>\n

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How the Main Boom Extension Cylinder Works<\/h2>\n

\"MainAt its core, the main boom extension cylinder is a double-acting hydraulic actuator that converts high-pressure hydraulic fluid energy into precise linear motion. When pressurised oil \u2014 sourced from the aerial work platform’s dedicated hydraulic circuit \u2014 enters the cap-end port, the piston rod extends smoothly and progressively, pushing the inner boom sections outward to raise the work platform to height. Retraction is achieved by directing flow to the rod-end port, collapsing the boom sections back into their retracted position. The HCYY11112009 operates at a rated working pressure of 23MPa, providing substantial pushing force while keeping structural loads within the machine’s design envelope.<\/p>\n

The cylinder barrel is precision-honed to a fine Ra surface finish, allowing the piston seals to glide with minimal friction across the full 815mm stroke. This surface quality directly translates to repeatable positional accuracy at height \u2014 critical when operators are placing workers precisely over construction steelwork or fa\u00e7ade access points on UK commercial projects. The rod is chrome-plated to a hard, corrosion-resistant finish, protecting against the wet outdoor conditions typical of a British worksite. Internal oil galleries are designed to minimise pressure drop, keeping the system’s hydraulic efficiency high throughout the working shift.<\/p>\n<\/div>\n

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Materials & Construction Quality<\/h2>\n
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\u2699<\/div>\n

Cylinder Barrel<\/p>\n

Seamless cold-drawn steel tubing, precision honed internally to Ra 0.4\u00b5m for optimum seal longevity and pressure retention.<\/p>\n<\/div>\n

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\ud83d\udd27<\/div>\n

Piston Rod<\/p>\n

45# high-strength steel, ground and hard chrome plated to HRC 58\u201362, delivering corrosion resistance suited to UK outdoor exposure and repeated wash-down cycles.<\/p>\n<\/div>\n

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\ud83d\udee0<\/div>\n

Seal System<\/p>\n

Imported polyurethane and NBR composite seal sets, rated for continuous operation from -25\u00b0C to +80\u00b0C, compatible with standard hydraulic mineral oil.<\/p>\n<\/div>\n

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\ud83c\udf1f<\/div>\n

End Caps & Welds<\/p>\n

Full-penetration butt welds, 100% pressure-tested at 1.5\u00d7 rated working pressure before despatch, ensuring structural integrity at every delivered unit.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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Technical Specifications<\/h2>\n

All parameters are factory-verified on every unit prior to despatch. The table below reflects the exact catalogue data for the HCYY11112009 main boom extension cylinder.<\/p>\n

\"Main<\/div>\n
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Cylinder Model<\/th>\nSpecifications<\/th>\nWorking Pressure<\/th>\nMaximum Withstand Pressure<\/th>\nTrip (mm)<\/th>\nInstallation Distance (mm)<\/th>\nWeight<\/th>\n<\/tr>\n<\/thead>\n
HCYY11112009<\/td>\n\u03a6110\u00d7\u03a675\u00d7815<\/td>\n23MPa<\/td>\n34MPa<\/td>\n815<\/td>\n1433<\/td>\n100kg<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
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Why Operators Across the UK Specify This Cylinder<\/h2>\n
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\u2713 High Burst Safety Margin<\/p>\n

With a maximum withstand pressure of 34MPa against a working pressure of 23MPa, the safety factor of 1.48\u00d7 is built in by design, not bolted on as an afterthought. This margin provides genuine protection during unexpected pressure spikes in demanding construction environments.<\/p>\n<\/div>\n

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\u2713 Long Stroke Precision<\/p>\n

The 815mm stroke length, combined with an installation distance of 1433mm, allows telescopic boom platforms to reach significant working heights without the cylinder becoming a geometric or weight bottleneck. At 100kg, it sits comfortably within typical boom counterbalance budgets.<\/p>\n<\/div>\n

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\u2713 Low Maintenance Intervals<\/p>\n

The composite seal package is rated for a minimum 2,000 operating hours before inspection, drastically cutting planned maintenance stops for plant hire businesses that cannot afford idle machines on UK construction sites.<\/p>\n<\/div>\n

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\u2713 Drop-in Replacement Ready<\/p>\n

Port dimensions, pin mounting centres, and rod end geometry are engineered to match common OEM boom cylinder patterns, making this a practical replacement option for worn units without requiring machine modifications.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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Where This Cylinder Operates Across the UK<\/h2>\n

From Scottish highland wind farm service to London fa\u00e7ade maintenance, the main boom extension cylinder suits a wide band of UK sectors requiring reliable aerial access.<\/p>\n

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\ud83c\udfd7 Construction & Civils<\/p>\n

Steel frame erection, concrete formwork access, and fa\u00e7ade cladding installation on major UK housing and commercial developments.<\/p>\n<\/div>\n

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\u26a1 Energy & Utilities<\/p>\n

Overhead line maintenance, wind turbine nacelle access inspection, and substation switchgear servicing in the UK energy sector.<\/p>\n<\/div>\n

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\ud83c\udfe0 Building Services<\/p>\n

HVAC plant installation on rooftops, fire suppression pipework runs, and electrical tray installation in large industrial and retail units.<\/p>\n<\/div>\n

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\u26ec Rail & Infrastructure<\/p>\n

Overhead electrification work, bridge inspection support, and Network Rail civils contracts requiring frequent access at height.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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Complete Cylinder Series for Aerial Work Vehicles<\/h2>\n

The HCYY11112009 is part of a comprehensive series covering every major hydraulic circuit position on telescopic and articulating boom platforms. Explore related cylinders for crane applications in our product range:<\/p>\n

\"Cylinder<\/div>\n
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Truck Crane Outrigger Frame Support Cylinder<\/p>\n

\u03a6140\u00d7640mm, working pressure 30MPa \u2014 engineered for high-load outrigger deployment on truck-mounted crane platforms.<\/p>\n

View Product \u2192<\/a><\/p>\n<\/div>\n

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Truck Crane Main Boom Luffing Cylinder<\/p>\n

\u03a6280\u00d73507mm, working pressure 31.5MPa \u2014 heavy-duty luffing actuator for large-tonnage truck crane main booms.<\/p>\n

View Product \u2192<\/a><\/p>\n<\/div>\n<\/div>\n<\/div>\n

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Customer Success: Real Projects, Real Results<\/h2>\n

The following case reflects a documented deployment of the HCYY11112009 in UK industrial conditions.<\/p>\n

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Case Study \u2014 UK Plant Hire \u00b7 West Midlands, England<\/div>\n

Reducing Unplanned Downtime on a 28m Telescopic Boom Fleet<\/h3>\n

A West Midlands plant hire company operating a fleet of 14 telescopic boom platforms was experiencing recurrent cylinder seal failures on their main boom extension units, resulting in approximately 3\u20134 machines offline each month during peak summer season. After switching to the HCYY11112009 across two thirds of the fleet, the maintenance team reported zero seal-related failures over the following eight months \u2014 a period covering over 19,000 combined operating hours across those machines. The reduced call-outs translated directly into measurable contract retention improvements with their primary construction sector clients.<\/p>\n

\u2014 Fleet Operations Manager, Plant Hire Operator, West Midlands UK<\/div>\n<\/div>\n
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“We specified these cylinders on a new batch of 20m booms we were assembling for the hire market. Installation was clean, fitment was accurate, and we’ve had zero warranty calls back in eight months of fleet operation.”<\/p>\n

\u2014 AWP Manufacturer, Yorkshire<\/p>\n<\/div>\n

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“Lead time was faster than expected, the technical data sheets arrived before the cylinders did, and the pressure test certificates were included in the shipment. Makes our incoming inspection straightforward.”<\/p>\n

\u2014 Procurement Engineer, Equipment Distributor, Greater Manchester<\/p>\n<\/div>\n

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“We had one machine that kept leaking from the original OEM boom cylinder. Fitted this as a replacement \u2014 it’s been running correctly for six months with no issues at all. Accurate to the published dimensions.”<\/p>\n

\u2014 Service Technician, Aerial Platform Specialist, South East England<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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Manufacturing Capability & Custom Engineering<\/h2>\n

\"Main<\/p>\n

Our factory operates a suite of CNC deep-hole boring lathes, automated honing lines, and robotic welding cells, giving us the process control to hold bore tolerances to H8 and rod tolerances to f7 at volume. The production test floor runs 100% pressure cycling and leak checks on every cylinder before it leaves the building. Beyond standard catalogue units, we provide a full custom cylinder engineering service \u2014 if the HCYY11112009 is close but not quite right for your machine geometry, our applications engineering team can work to your mounting dimensions, port positions, rod end design, and stroke length. Custom seal compound upgrades, corrosion-resistant coating options such as electroless nickel plating or ceramic-chrome rod finishing, and non-standard fluid compatibility are all part of what we offer. Minimum order quantities for custom programmes are negotiable, and we regularly support both single-unit prototypes for development programmes and container-quantity production runs for high-volume OEM customers across the UK.<\/p>\n

Get a Quote<\/a><\/p>\n<\/div>\n

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Frequently Asked Questions<\/h2>\n
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What is the correct working pressure for the HCYY11112009 main boom extension cylinder in a telescopic boom lift application?<\/div>\n
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The HCYY11112009 is rated for a working pressure of 23MPa, with a maximum withstand pressure of 34MPa. In practice, the hydraulic circuit on your aerial work platform should be set and relief-valve protected at or below 23MPa to ensure cylinder service life and operator safety. Operating consistently above the rated working pressure will accelerate seal wear and may void cylinder performance guarantees.<\/p>\n<\/div>\n<\/div>\n

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Where in the UK can I get a price and lead time for a main boom extension cylinder for a telescopic boom lift?<\/div>\n
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You can request a quote directly by emailing sales@steeringcylinder.top with your required model number, quantity, and delivery location. We handle enquiries from buyers across England, Scotland, Wales, and Northern Ireland. Lead times vary by order volume, but standard catalogue units are typically quoted with FOB or CIF UK port terms within 24\u201348 hours of enquiry.<\/p>\n<\/div>\n<\/div>\n

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How does a main boom extension cylinder differ from a boom luffing cylinder, and which one does my platform need?<\/div>\n
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The extension cylinder drives the telescoping action \u2014 it pushes the inner boom sections along their axis to increase the reach and height of the platform. A luffing cylinder, by contrast, raises and lowers the entire boom assembly’s angle relative to the machine chassis. Most telescopic boom platforms use both types simultaneously, so you will need to identify which circuit is at fault before ordering a replacement. If you are unsure, contact our applications team with the machine make, model, and the mounting dimensions from the old cylinder.<\/p>\n<\/div>\n<\/div>\n

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What seals does the HCYY11112009 use, and are they compatible with mineral hydraulic oil commonly used in the UK?<\/div>\n
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The standard seal package uses polyurethane piston seals and NBR rod seals with PTFE-coated guide rings. This combination is fully compatible with standard HM-grade mineral hydraulic oil (ISO VG 46 or ISO VG 68) used by the vast majority of UK aerial work platform operators. If your system runs biodegradable hydraulic fluid or fire-resistant fluid, contact us for an upgraded seal specification before ordering.<\/p>\n<\/div>\n<\/div>\n

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Can this main boom extension cylinder be custom-made to a different stroke length for a UK OEM boom lift manufacturer?<\/div>\n
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Yes. Our factory offers full custom cylinder engineering, including modified stroke lengths, alternative mounting geometry, different port configurations, and alternative rod end designs. We support UK OEM manufacturers from prototype stage through to volume production. Send your drawings or key dimensions to sales@steeringcylinder.top and our applications engineering team will respond with a feasibility assessment and quotation.<\/p>\n<\/div>\n<\/div>\n

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What documentation comes with the cylinder, and does it include a pressure test certificate for UK buyers?<\/div>\n
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Each shipment includes a material certificate, dimensional inspection report, and a pressure test certificate confirming the unit was hydraulically tested at 1.5\u00d7 working pressure before despatch. Additional documentation such as a Declaration of Conformity, third-party inspection reports, or specific material traceability certificates can be arranged for UK buyers with a specific regulatory or contractual requirement \u2014 please specify at the enquiry stage so we can factor this into the quotation.<\/p>\n<\/div>\n<\/div>\n

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Ready to source the HCYY11112009 for your UK project or fleet?<\/p>\n

Get a Quote \u2014 sales@steeringcylinder.top<\/a><\/p>\n<\/div>\n<\/div>\n

edit by gzl<\/p>","protected":false},"excerpt":{"rendered":"

Main boom extension cylinder HCYY11112009 \u2014 \u03a6110\u00d7\u03a675\u00d7815mm, 23MPa, 34MPa burst. Telescopic boom lift hydraulic cylinder supplier for UK B2B buyers.<\/p>","protected":false},"featured_media":893,"comment_status":"open","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[22],"product_tag":[],"class_list":["post-892","product","type-product","status-publish","has-post-thumbnail","product_cat-cylinder-series-for-aerial-work-vehicles","first","instock","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/steeringcylinder.top\/sv\/wp-json\/wp\/v2\/product\/892","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/steeringcylinder.top\/sv\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/steeringcylinder.top\/sv\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/steeringcylinder.top\/sv\/wp-json\/wp\/v2\/comments?post=892"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/steeringcylinder.top\/sv\/wp-json\/wp\/v2\/media\/893"}],"wp:attachment":[{"href":"https:\/\/steeringcylinder.top\/sv\/wp-json\/wp\/v2\/media?parent=892"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/steeringcylinder.top\/sv\/wp-json\/wp\/v2\/product_brand?post=892"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/steeringcylinder.top\/sv\/wp-json\/wp\/v2\/product_cat?post=892"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/steeringcylinder.top\/sv\/wp-json\/wp\/v2\/product_tag?post=892"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}