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The grain tank lifting cylinder is a precision-engineered hydraulic component at the heart of modern combine harvesters. Responsible for raising and lowering the grain tank cover or extension flap, it must perform under sustained pressure, repeated cycling, and the unpredictable vibration loads of field operation. UK arable farms — from the flat fens of Lincolnshire to the rolling chalk downland of Hampshire — push harvesting equipment to its limits during the narrow seasonal window. A cylinder that fails mid-harvest does not just slow output; it stops it entirely. This is why our HCYY11112016 grain tank lifting cylinder is manufactured to exceed, not merely meet, standard operating tolerances, giving operators genuine confidence through every harvest rotation.
Technical Specification
The table below reproduces the full factory datasheet for model HCYY11112016. All measurements reflect the as-shipped condition; installation distances and stroke values are in millimetres unless otherwise stated.
Data verified against factory test records. Custom bore, stroke and port configurations available on request.
How the Grain Tank Lifting Cylinder Works
The HCYY11112016 operates on a single-acting or double-acting piston principle — hydraulic fluid is supplied under pressure to the full-bore side, extending the piston rod and raising the grain tank cover through a mechanical linkage. When pressure is released or reversed, the rod retracts smoothly under controlled flow. The working pressure ceiling of 16.7 MPa provides more than adequate force to lift loaded tank extensions even on heavily burdened machines, while the 24.5 MPa burst rating delivers the safety margin that UK field machinery regulations and OEM quality standards demand.
The cylinder body is manufactured from seamless cold-drawn steel tubing, internally honed to Ra 0.4 µm for consistent seal life across wide temperature swings — critical in Britain’s damp autumn harvesting conditions. The piston rod is hard-chrome plated (minimum 20 µm depth) then ground and polished, resisting the corrosion and abrasion that dusty threshing environments generate. Wiper seals at the rod end are fitted with polyurethane dust exclusion lips to keep chaff and grit away from the working seals, and internal O-rings are NBR compounds rated from -25°C to +100°C. Every unit is hydraulically pressure-tested at the factory to 1.5× maximum rated pressure before despatch.
Application Scenarios
Combine Harvester Grain Tanks
Lifting and locking grain tank extensions on Claas, John Deere, and New Holland combines operating on British cereal farms.
Specialised Harvesting Attachments
OEM-matched replacement for aftermarket distributors supplying spare parts across the East Midlands, Yorkshire, and East Anglia.
Agricultural OEM Supply Chains
Batch supply to UK and European machinery manufacturers who require consistent dimensional accuracy and certified pressure testing across production runs.
Farm Machinery Service Centres
Rapid-replacement units stocked by agricultural dealers in Scotland, Wales, and Northern Ireland to minimise combine downtime at peak harvest.
Why Operators Choose This Cylinder
Oversized Safety Margin
The 24.5 MPa burst pressure is 46% above working pressure — a genuine engineering buffer, not a datasheet footnote. Pressure spikes from rough terrain or rapid cycling will not compromise the barrel or seals.
Corrosion-Resistant Finish
Hard-chrome rod plating and phosphate surface treatment on the cylinder body hold up to the salt-laden coastal air experienced in areas like the Lincolnshire and Norfolk fens during autumn harvest.
Dimensional OEM Compatibility
The 823 mm installation distance and standard clevis mounting pattern allow direct-fit replacement on a wide range of combine models without bracket modification — saving workshop time during the critical harvest season.
Low Weight, High Output
At 18 kg, the HCYY11112016 keeps unsprung mass minimal while still delivering the full force output required. Lighter cylinders reduce stress on mounting brackets and pivot pins, extending service life across the whole linkage.
Customer Success Stories
Agricultural machinery businesses across the UK have made this grain tank lifting cylinder a core stocking line. Here is what three of our partners report after a full harvest season.
Broadland Agricultural Parts, Norfolk, UK
Aftermarket Parts Distributor — 2025 Wheat Harvest Season
Broadland Agricultural Parts supplies hydraulic replacement components to approximately 80 arable farms across Norfolk and North Suffolk. In 2025 they trialled 24 units of the HCYY11112016 as a like-for-like replacement across three Claas Lexion and two John Deere S-series combine fleets. All 24 cylinders completed the full harvest season — averaging 420 operating hours each — without a single seal failure or fitting leak reported. The dealership has since placed standing orders for the model as a standard stock item, citing zero warranty returns and a lead time of under seven working days from our Bury St Edmunds despatch point.
“We replaced our combine’s original grain tank cylinder mid-season last year and were back in the field within a morning. Fit was exact, no shimming needed. Pressure-held fine at 16.7 MPa through the entire barley run.”
— Farm Manager, Cambridgeshire Cereal Farm
“Sourced 10 units for our parts van stock ahead of harvest. Price was competitive, delivery tracked accurately, and every cylinder arrived with a test certificate. Not had one comeback from a customer yet.”
— Parts Manager, Agricultural Machinery Dealer, Lincolnshire
“We needed 8 cylinders at short notice for a fleet service contract on Yorkshire farms. Got them within the week. The chrome finish on the rod looks properly industrial-grade — not the thin coating you sometimes see on cheap imports.”
— Procurement Lead, Agricultural Service Contractor, Yorkshire
Related Hydraulic Cylinders for Agricultural Machinery
Alongside the grain tank lifting cylinder, we supply a comprehensive range of hydraulic cylinders for aerial work vehicles and specialist agricultural platforms. Two of our most frequently specified models for UK buyers are listed below.
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Folding Boom Angle Cylinder for Aerial Work Vehicle (1458mm Stroke)
Designed for heavy-duty folding boom articulation on aerial platforms. 1458 mm stroke delivers the extended reach needed for elevated work at height across UK construction and utility sectors.
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Aerial Platform Steering Cylinder (320mm Stroke)
Compact 320 mm stroke steering cylinder for self-propelled aerial work platforms. Precision bore tolerances ensure responsive directional control in confined UK work sites.
Agricultural Machinery Cylinder Series
Manufacturing & Custom Cylinder Service
UK Ever-power Boom Cylinders Co., Ltd. operates from Bury St Edmunds, Suffolk, with manufacturing and engineering support drawn from an ISO-certified facility running full CNC honing, turning, and seal-assembly lines dedicated exclusively to hydraulic cylinders. Every grain tank lifting cylinder passes a 100% hydraulic pressure test and dimensional inspection before despatch — no sampling, no exceptions.
Our custom cylinder design service is available to UK agricultural OEMs, Tier-1 component distributors, and specialist machine builders who need dimensions, port specifications, or materials that fall outside standard catalogue parameters. We can modify bore diameter, rod diameter, stroke length, mounting style (clevis, flange, trunnion), port thread form (BSP, SAE, JIC), and seal compound to suit your exact application. Minimum order quantities for custom variants start at five pieces for prototype validation, scaling to full production batches. The typical engineering-to-delivery lead time for a bespoke grain tank or agricultural lifting cylinder is four to six weeks from drawing approval.
Custom Bore & Stroke
BSP / SAE / JIC Ports
UK Despatch — Suffolk IP32
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Ready to order or need a custom specification?
Our team in Bury St Edmunds is ready to help UK agricultural businesses source the right hydraulic cylinder — fast.
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