Outrigger Rack Support Cylinder

High-Pressure Rated

Sustained 20 MPa working pressure with a 30 MPa safety ceiling ensures the cylinder performs without creep or seal blowout during maximum outrigger load scenarios.

Precision Bore-Rod Ratio

The Φ70 × Φ50 mm combination delivers a rod area of approximately 1963 mm², providing strong retraction force — critical for pulling outrigger beams back under load.

Custom-Fit Stroke Length

A 1237 mm stroke matches the deployment range of most 25–50 tonne truck crane outrigger assemblies, reducing the need for adapter sleeves or modified mounting plates.

Durable Sealing System

Polyurethane and PTFE composite seals resist hydraulic fluid degradation and temperature cycling from sub-zero Scottish winter sites to warm summer conditions across southern England.

Full Pressure-Test Certification

Every outrigger cylinder is hydrostatically tested before despatch, with documentation available for UK fleet operators who need traceable component records for safety inspections and LOLER compliance.

Direct UK Despatch

Export-packaged for sea or air freight, with standard lead times and express options available for crane fleets needing urgent replacement units to minimise downtime on live construction contracts.

Operating Principle

Pressurised hydraulic fluid enters the cap-end port, pushing the piston and rod assembly outward to extend the outrigger beam. Return oil exits through the rod-end port. A balanced spool valve in the crane’s hydraulic circuit holds the cylinder in any intermediate position without drift, keeping the machine stable during crane operation. The annular differential between bore and rod areas means retraction requires less flow volume than extension — this is intentional, as retraction typically occurs unladen.

Materials & Construction

The cylinder barrel is manufactured from seamless cold-drawn steel tube, honed to Ra 0.4 µm internally for optimal seal life. The piston rod is 50Cr alloy steel, hard chrome plated to 20–25 µm and ground to h6 tolerance — giving a surface hardness above 850 HV that resists the abrasion found on construction and quarry sites throughout the UK. End caps are forged steel, machined and thread-locked. All external surfaces receive anti-corrosion primer suited to the coastal and industrial environments common in UK infrastructure projects.

Typical Applications (UK)

• 25–50 tonne truck-mounted cranes (road haulage and plant hire)
• Telescopic boom elevated work platforms (Nationwide rental fleets)
• Bridge inspection units operated by local authorities
• Offshore supply vessel crane outriggers (North Sea logistics)
• Concrete pump truck outrigger systems (major construction contractors)
• Recovery vehicle stabiliser legs (motorway incident response)

Aerial Platform Steering Cylinder (320mm Stroke)

Engineered for the steering axis of aerial work platforms, this short-stroke cylinder provides precise angular control for platform directional changes at height. Compact mounting, 320 mm stroke, and robust seal selection make it a direct-fit solution for scissor and boom-type EWPs across UK hire fleets.

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Grain Tank Lifting Cylinder

Purpose-built for combine harvester grain tank tipping systems, this lifting cylinder copes with the cyclical loading inherent in agricultural harvesting. Dust-sealed rod ends, corrosion-resistant surface treatment, and a stroke profile matched to common grain tank pivots make it a reliable seasonal replacement unit for UK arable farms and dealerships.

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“We ordered HCYY11112022 units as replacement outrigger cylinders for our Grove crane fleet. Fitment was straightforward — the installation distance matched our existing pin centres without any modification. Three months on and all units are holding pressure perfectly.”

— Operations Director, Crane Hire Company, Yorkshire

“Compared prices from three suppliers before going with boom-cylinders.com. The technical specification matched what we needed exactly, delivery was fast, and the quality when we stripped one for inspection was on par with OEM pricing at roughly 30% lower cost. Will be ordering again.”

— Fleet Engineer, Infrastructure Contractor, Manchester

“Our workshop carries HCYY11112022 as a stock-in-service part for mobile crane outrigger repairs. The hydraulic test certification that comes with each unit is genuinely useful — our customers expect documentation for their LOLER records and this saves us having to arrange independent testing.”

— Parts Manager, Specialist Crane Workshop, East Midlands

BORE RANGE

Φ40 mm — Φ200 mm

MAX STROKE

Up to 6,000 mm

PRESSURE RANGE

Up to 40 MPa

MIN ORDER

1 unit (custom: 5 units)

You can order the HCYY11112022 outrigger rack support cylinder directly from boom-cylinders.com with delivery to any UK postcode. Pricing is available on request via [email protected] — standard lead time is 12–20 working days depending on order volume. Express options are available for urgent replacement needs. The price varies by quantity; single-unit and fleet-volume quotes are both accommodated.

The HCYY11112022 is rated at 20 MPa working pressure with a maximum withstand pressure of 30 MPa — well within the hydraulic circuit pressures used by 25–50 tonne truck cranes common on UK construction sites. The 30 MPa ceiling also provides an adequate safety margin for pressure spikes that can occur during rapid valve operation on older crane control systems.

Measure the pin-to-pin installation distance at full retraction (this is 140 mm for the HCYY11112022) and the total deployment distance you need (stroke = 1237 mm on this model). Also confirm the bore and rod diameters by checking the OEM parts list or measuring the existing cylinder. Send these dimensions to our team and we’ll confirm compatibility or recommend an alternative from the series range.

Yes. Custom outrigger cylinder orders are a regular part of our work with UK fleet operators and OEM equipment manufacturers. We can modify bore, rod diameter, stroke length, port orientation, and surface treatment to match your drawing or existing cylinder dimensions. Custom units carry the same hydrostatic test certification as standard stock items. Minimum order for custom configurations is typically 5 units, with lead times of 4–6 weeks from drawing approval.

Each unit ships with a hydrostatic pressure test certificate confirming it was tested to rated working pressure and maximum withstand pressure before despatch. A dimensional inspection report is available on request. These documents are formatted to support LOLER (Lifting Operations and Lifting Equipment Regulations 1998) documentation requirements that UK crane operators and their insurance engineers typically request at annual thorough examination.

Replace when you observe visible rod seal weeping (oil tracking down the chrome rod), slow cylinder drift under load (outrigger beam creeping inward while the crane is working), erratic or jerky extension/retraction, or any scored section of the chrome rod surface. In high-cycle rental fleet environments, proactive replacement at 3,000–5,000 hours of crane operation is sensible even without visible failure. For North Sea or coastal site crane fleets in Scotland and northern England, inspect the external rod surface for corrosion pitting annually.