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Truck Crane Hydraulic Components · UK B2B Supply
Truck Crane Rear Outrigger Opening Cylinder — Φ40×635mm, 12MPa
Precision-engineered hydraulic cylinder for rear outrigger rack deployment on truck-mounted cranes. Built to EN/ISO standards, trusted by UK crane operators and hire fleets.
The Truck Crane Rear Outrigger Opening Cylinder (HCYY11112026, Φ40×635mm) is a compact, high-performance hydraulic actuator designed specifically to drive the lateral deployment of rear outrigger rack arms on truck cranes. Operating at a rated working pressure of 12MPa and certified to withstand up to 18MPa, this cylinder delivers the force and reliability demanded by heavy-lift operations across UK construction sites, infrastructure projects, and industrial plant maintenance. The unit’s 635mm stroke enables complete rack extension in a controlled, single-action motion — eliminating manual intervention and reducing setup time on site.
Designed with a bore of Φ40mm and rod diameter of Φ25mm, the cylinder is manufactured from high-tensile alloy steel with precision-honed internal surfaces and multi-lip sealing systems that maintain zero-leak performance even under prolonged field cycles. The total installation distance of 840mm suits standard truck crane chassis layouts without modification, while the 9kg unit weight keeps axle loads well within UK road transport regulations. Whether you are a crane OEM sourcing components for a new build or a fleet operator replacing an outrigger cylinder mid-project, this unit is available ex-stock or to custom specification.
Technical Specifications
All data sourced from factory type-test documentation. Parameters strictly as per original product catalogue.
How It Works — Principle, Materials & Application Scenarios
Working Principle
The rear outrigger opening cylinder operates as a single-acting or double-acting hydraulic linear actuator depending on the host crane’s hydraulic circuit design. Pressurised oil — supplied by the crane’s onboard pump at up to 12MPa — enters the cap-end port, driving the piston rod outward along its 635mm stroke and pushing the rear outrigger rack arm to its fully deployed position. When the valve is reversed, oil returns to tank and the rod retracts under the weight of the rack assembly. The precision-lapped bore ensures consistent friction across the full stroke, preventing uneven deployment that could compromise crane stability during lifting operations.
Materials & Construction
The cylinder barrel is produced from seamless cold-drawn hydraulic tubing in 27SiMn or equivalent high-strength alloy steel, with an internal finish of Ra 0.4–0.8 µm to extend seal life and minimise internal leakage. The piston rod (Φ25mm) is precision-ground chrome-plated alloy steel with a minimum chrome layer of 20–25 µm, protecting against corrosion during outdoor UK operation where moisture and road salt are persistent concerns. End caps are machined from ductile cast iron or forged steel. The sealing system uses composite PTFE-backed lip seals rated for continuous operation from -20°C to +80°C, covering the full range of British seasonal conditions.
Application Scenarios
This cylinder is fitted as a direct OEM or replacement component on 8–25 tonne truck-mounted cranes, including small all-terrain cranes used across UK road maintenance, utilities, and the civil construction sector. Common deployment environments include motorway gantry erection, rail infrastructure projects, steel fabrication yards, and oil terminal maintenance in Scotland and the North Sea service sector. The cylinder is also compatible with certain knuckle-boom and mini-crane chassis where the rear rack geometry uses a Φ40mm bore actuator of sub-700mm stroke. Crane hire companies in the Midlands and South East have found the HCYY11112026 a reliable like-for-like upgrade when original OEM cylinders become unavailable.
Why UK Crane Engineers Specify This Cylinder
Pressure Safety Margin
Rated to withstand 18MPa against a working pressure of 12MPa — a 50% safety margin that far exceeds the requirements of BS EN ISO 10100 for hydraulic cylinders in lifting equipment.
Compact & Lightweight
At just 9kg, the HCYY11112026 is among the lightest cylinders in its pressure class. Installation requires no special tooling, and the slim Φ40mm barrel integrates cleanly into tight rear chassis outrigger envelopes.
Custom Configuration Available
Port thread, end fitting, mounting style, and stroke length can all be adapted to your specific crane model. Our engineering team provides full drawing review and rapid prototype service for OEM customers.
Corrosion-Resistant Finish
Hard chrome piston rod with optional exterior epoxy coating suits UK coastal and industrial environments. Salt spray tested to 500 hours, meeting the durability expectations of offshore and port crane applications.
Related Products in the Truck Crane Cylinder Series
The rear outrigger opening cylinder is part of a comprehensive hydraulic cylinder programme for truck cranes. Explore related units below:
Truck Crane Front Outrigger Opening Cylinder — Φ40×1855mm, 12MPa
Longer-stroke front counterpart for full outrigger arm deployment. Same 12MPa working pressure, compatible hydraulic circuit, designed to pair with the rear cylinder for balanced crane stabilisation.
Truck Crane Outrigger Frame Support Cylinder — Φ140×640mm, 30MPa
High-pressure vertical support cylinder that bears the crane’s deadweight load during lifting operations. Φ140mm bore and 30MPa rating for maximum load capacity on large-tonnage truck cranes.
Customer Success Story
Case Study — UK Crane Hire & Lifting Contractor
Midlands-Based Fleet Operator Cuts Outrigger Downtime by 60%
A Birmingham-based crane hire company operating a mixed fleet of 12- and 16-tonne truck cranes was experiencing repeated outrigger cylinder failures during peak summer and winter periods. The original OEM rear outrigger opening cylinders were showing internal seal degradation after approximately 18 months of service, causing unscheduled downtime of up to 4 days per incident while replacement parts were sourced from the continent.
In Q1 2024, their procurement manager contacted our UK sales team and specified the HCYY11112026 as a like-for-like replacement across six crane units. We supplied a batch of 12 cylinders within 10 working days, with full dimensional verification documentation. After 14 months in service — including the wet winter of 2024-25 — none of the replaced units had required maintenance. The fleet operator estimated an annual saving of over £18,000 in crane downtime costs, plus reduced subcontractor hire during breakdown periods.
“Ordered two rear outrigger cylinders for our Liebherr LTM fleet. Both fitted perfectly with no adaptor bushings required. Delivery to our Leeds depot was faster than quoted.”
R. Hardcastle — Plant Manager, Yorkshire
“We source hydraulic components for three different brands of crane and the technical support from this supplier is a cut above. Detailed drawings, fast lead times, competitive pricing.”
S. Patel — Procurement, Bristol
“Used on our harbour crane refurbishment project in Aberdeen. The cylinders handled North Sea conditions well — no corrosion after 10 months of coastal operation.”
D. Fraser — Engineering Lead, Scotland
Factory Capabilities & Custom Engineering Services
Our production facility operates a dedicated hydraulic cylinder manufacturing line with CNC deep-hole boring, precision honing, automated chrome plating, and multi-stage pressure testing — all in-house under one roof. For standard products like the HCYY11112026, production cycles are measured in days, not weeks. For custom requirements, our engineering team handles full reverse engineering from worn-out samples, customer-supplied drawings, or dimensional specifications alone. Port configurations (BSP, NPT, metric), mounting styles (flange, trunnion, clevis, foot mount), stroke adjustments, and special seal compounds for high-temperature or fire-resistant fluid applications can all be accommodated.
UK customers particularly value our pre-shipment test reports — every cylinder is pressure-tested at 1.5x rated pressure before despatch, with the test certificate included in the shipping documentation. We hold ISO 9001 certification for the cylinder manufacturing process and can supply CE Declaration of Conformity on request for customers integrating these cylinders into UKCA-marked lifting equipment. MOQ is as low as one piece for standard models, with volume pricing available from 10 units upward.
Frequently Asked Questions
Where can I buy a replacement truck crane rear outrigger opening cylinder in the UK?
You can source the HCYY11112026 directly through steeringcylinder.top, with delivery available to depots anywhere in England, Scotland, and Wales. Contact [email protected] for a quote and lead time.
What is the price of a truck crane outrigger hydraulic cylinder for a UK crane hire company?
Pricing depends on specification and order quantity. Volume breaks are available from 10 units upward. Email our sales team with your quantity, delivery address, and crane model for a firm, itemised quote within one working day.
Which hydraulic cylinder fits the rear outrigger rack of a 12-tonne truck crane working on UK construction sites?
The HCYY11112026 (Φ40×635mm, 12MPa) suits most 8–16 tonne truck cranes. Share your crane make, model, and the existing cylinder’s outer diameter and stroke measurement, and our engineers will confirm fit within 24 hours.
How long does it take to get a custom-specification truck crane outrigger cylinder delivered to a plant depot in England?
Standard in-stock units typically ship within 3–5 working days to UK addresses. Custom cylinders with modified stroke, porting, or mounting are usually ready in 15–25 working days. Urgent requirements can be accommodated — please indicate your deadline in your enquiry.
What is the maximum pressure rating for a truck crane rear outrigger cylinder used in Scottish offshore crane operations?
The HCYY11112026 works at 12MPa and is withstand-tested to 18MPa — a 50% safety margin above rated pressure. This is well within the tolerance required for coastal and offshore lifting environments in Scotland and the North Sea.
Can a truck crane hydraulic cylinder supplier provide UKCA or CE documentation for lifting equipment used in England and Wales?
Yes. We can furnish ISO 9001 pressure test certificates, material traceability records, and CE Declaration of Conformity to support UKCA marking of your lifting equipment. Please mention your compliance requirements when you contact us for a quote.
Trusted by UK Crane Operators & OEMs
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