Øvre nivelleringscylinder til arbejdsplatform (60 mm slaglængde)

How It Works

The upper leveling cylinder operates as part of a closed-loop parallelogram linkage. As hydraulic oil enters the rod-side port, the piston rod retracts across its 60mm stroke, pulling the platform linkage to counteract boom elevation. The 25 MPa working pressure is maintained by the machine’s dedicated leveling circuit, which monitors boom position via a sensor and modulates flow through a proportional valve. Peak transient loads — such as those from sudden boom stops — are safely absorbed up to the 30 MPa maximum withstand pressure, ensuring no seal failure or rod deformation under UK field conditions.

Materials & Construction

The cylinder barrel is machined from seamless cold-drawn steel tubing with an internal honing finish of Ra 0.4 µm, minimising seal wear over extended service cycles. The piston rod is manufactured from 45# high-carbon steel and hard-chrome plated to a minimum thickness of 25 µm, providing corrosion resistance essential for outdoor aerial platforms operating across the UK’s variable climate. Internal sealing uses a compound of polyurethane lip seals and PTFE wear rings — compatible with standard mineral hydraulic oil (ISO VG 46) commonly specified by British OEMs. The end caps are forged steel, machined to exact tolerances and pressure-tested at the factory before dispatch.

Applikationsscenarier

The HCYY11112008 upper leveling cylinder is specified across a broad range of aerial work vehicle types deployed throughout England, Scotland, Wales, and Northern Ireland. Primary platforms include articulated knuckle boom lifts (8–20 m working height), telescopic straight boom platforms used by utilities contractors, and spider-type tracked aerial platforms for confined or uneven terrain. Beyond construction, the cylinder is extensively used in UK facility management — including maintenance of warehouses, railway overhead line structures, bridge inspection rigs, and wind farm nacelle access platforms. Its compact 375mm installation distance makes it suitable for space-constrained boom assemblies where envelope sizing is critical.

High Pressure Integrity

Rated to 25 MPa continuous working pressure and proof-tested to 30 MPa, the cylinder maintains zero leakage across the full stroke envelope.

Long Service Life

Hard-chrome rod surface and compound seal package together extend mean time between overhauls beyond 5,000 operating hours under typical UK field conditions.

Compact Envelope

At just 375mm installation distance and 16kg, the HCYY11112008 slots into existing boom assemblies without requiring structural modifications or counterweight re-balancing.

All-Climate Sealing

Polyurethane and PTFE compound seals maintain full function from -20°C to +80°C, covering the full temperature range encountered on British outdoor job sites through winter.

Factory-Tested & Documented

Every unit undergoes 100% pressure cycle testing at factory before shipment, with full test records provided — supporting LOLER compliance documentation for UK operators.

Drop-In Replacement Compatible

Standard pin-joint interface dimensions are kept consistent with common OEM specifications, making the HCYY11112008 a practical service replacement across multiple platform brands.

“We’ve run these leveling cylinders across our 12-metre boom fleet for over a year now. Not a single seal failure. The fit was straightforward and the test certs made our LOLER paperwork easy.”

— Plant Hire Fleet Manager, Birmingham, UK

“Sourcing hydraulic cylinders for specialist aerial platforms used to mean long waits or expensive OEM pricing. These units arrived on the agreed schedule, the quality is visibly high, and the pricing made the procurement decision simple.”

— Procurement Manager, Utilities Access Contractor, Leeds, UK

“The technical support team responded within hours when I asked about port sizing compatibility. That level of pre-sales engineering support is rare at this price point. The cylinders themselves have been solid.”

— Service Engineer, Access Platform OEM, Glasgow, Scotland