{"id":1786,"date":"2026-06-29T07:03:46","date_gmt":"2026-06-29T07:03:46","guid":{"rendered":"https:\/\/tiltcylinder.com\/?post_type=product&p=1786"},"modified":"2026-06-29T07:03:46","modified_gmt":"2026-06-29T07:03:46","slug":"ep-%cf%8640x%cf%8625x100x2-upper-leveling-cylinder-for-aerial-work-vehicle","status":"publish","type":"product","link":"https:\/\/tiltcylinder.com\/ms\/product\/ep-%cf%8640x%cf%8625x100x2-upper-leveling-cylinder-for-aerial-work-vehicle\/","title":{"rendered":"EP-\u03a640\u00d7\u03a625\u00d7100\u00d72 Upper Leveling Cylinder For Aerial Work Vehicle"},"content":{"rendered":"
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Aerial Work Vehicle | Hydraulic Leveling System<\/p>\n

EP-\u03a640\u00d7\u03a625\u00d7100\u00d72 Upper Leveling Cylinder
\nFor Aerial Work Vehicle<\/span><\/h2>\n

Precision-engineered upper leveling cylinder designed to maintain platform horizontality on boom-type aerial work platforms \u2014 ensuring operator safety, regulatory compliance, and reliable performance across construction, maintenance, and infrastructure applications throughout France and the wider European market.<\/p>\n

Lifting Cylinder\u00a0<\/a>
\nRequest a Quote<\/a><\/div>\n<\/div>\n<\/div>\n
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1. Technical Specifications<\/h2>\n

Complete dimensional and performance parameters for the EP-\u03a640\u00d7\u03a625\u00d7100\u00d72 upper leveling cylinder as supplied for aerial work vehicle applications.<\/p>\n

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Parameter<\/th>\nValue<\/th>\nNotes<\/th>\n<\/tr>\n<\/thead>\n
Cylinder Model<\/td>\nHCYY11112008<\/td>\nEP Series Upper Leveling<\/td>\n<\/tr>\n
Specifications (Bore \u00d7 Rod \u00d7 Stroke)<\/td>\n\u03a663 \u00d7 \u03a645 \u00d7 60 mm<\/td>\nDouble acting<\/td>\n<\/tr>\n
Working Pressure<\/td>\n25 MPa<\/td>\nContinuous rated<\/td>\n<\/tr>\n
Maximum Withstand Pressure<\/td>\n30 MPa<\/td>\nProof \/ test pressure<\/td>\n<\/tr>\n
Stroke (Trip)<\/td>\n60 mm<\/td>\nFull leveling travel range<\/td>\n<\/tr>\n
Installation Distance<\/td>\n375 mm<\/td>\nPin-to-pin retracted<\/td>\n<\/tr>\n
Weight<\/td>\n16 kg<\/td>\nFully assembled<\/td>\n<\/tr>\n
Hydraulic Port (Metric)<\/td>\n2 \u00d7 G3\/8<\/td>\nStandard European fitting<\/td>\n<\/tr>\n
Hydraulic Port (Imperial)<\/td>\n2 \u00d7 7\/8-14 UNF<\/td>\nSAE \/ imperial option<\/td>\n<\/tr>\n
Port Angle<\/td>\n20\u00b0<\/td>\nAngled for hose routing<\/td>\n<\/tr>\n
Clevis Pin Diameter<\/td>\n\u03a628 mm (R1)<\/td>\nBoth end attachments<\/td>\n<\/tr>\n
Clevis Eye Radius<\/td>\nR30 mm<\/td>\nFront and rear clevis<\/td>\n<\/tr>\n
Rear Mount Bolt Pattern<\/td>\n2 \u00d7 M10<\/td>\nAnti-rotation mounting<\/td>\n<\/tr>\n
Overall Envelope (Height \u00d7 Width)<\/td>\n144 mm \u00d7 115 mm<\/td>\nMax cross-section<\/td>\n<\/tr>\n
Mount Block Footprint<\/td>\n95 \u00d7 40 mm<\/td>\nBase plate section<\/td>\n<\/tr>\n
Actuation Type<\/td>\nDouble Acting<\/td>\nExtend and retract powered<\/td>\n<\/tr>\n
Application<\/td>\nAerial Work Platform<\/td>\nUpper boom articulation joint<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/div>\n

\"tiltcylinder-products-EP-\u03a640\u00d7\u03a625\u00d7100\u00d72<\/p>\n

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2. What Is an Upper Leveling Cylinder?<\/h2>\n

An upper leveling cylinder is a hydraulic actuator installed on articulating and telescopic boom aerial work platforms to automatically maintain the working platform in a level position as the boom changes elevation angle. In boom-type aerial work vehicles \u2014 widely used across the construction, infrastructure, and utility sectors in France and throughout Europe \u2014 the operator platform must remain horizontal regardless of whether the boom is extended horizontally, angled at 45 degrees, or elevated to full vertical reach. Without a precisely calibrated upper leveling cylinder driving the platform linkage, the basket would tilt dangerously with every change in boom angle, making the machine unable to meet the safety requirements set out in EN 280 and related European standards. The upper leveling cylinder prevents this tilt by mechanically restoring the platform to horizontal at every boom angle change.<\/p>\n

The EP-\u03a640\u00d7\u03a625\u00d7100\u00d72 upper leveling cylinder is a short-stroke double-acting hydraulic cylinder purpose-built for this leveling function. It operates as part of a master-slave hydraulic circuit in which a lower leveling cylinder at the boom pivot tracks the boom angle mechanically, and the upper leveling cylinder at the platform joint translates that angular motion into a compensating angular correction. The result is continuous, automatic platform leveling throughout the full operating envelope of the machine \u2014 typically \u00b175 degrees from horizontal \u2014 without any input from the operator.<\/p>\n

With a bore of \u03a663 mm, rod diameter of \u03a645 mm, and a 60 mm stroke, this upper leveling cylinder delivers the precise, repeatable motion that leveling systems demand. The upper leveling cylinder rated working pressure of 25 MPa and maximum withstand pressure of 30 MPa give ample safety margin for the shock loads and pressure transients that occur during normal machine operation on uneven ground or when the platform is suddenly occupied at full extension.<\/p>\n<\/div>\n

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3. Five Key Advantages of the EP Upper Leveling Cylinder<\/h2>\n

What distinguishes this upper leveling cylinder from commodity alternatives in the aerial work platform market.<\/p>\n

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1. Precision Bore and Rod Tolerances<\/h3>\n

The \u03a663 bore is honed to H7 tolerance and the \u03a645 rod ground to f7, producing a radial clearance that maintains consistent oil film without allowing lateral play to develop. In the upper leveling cylinder the rod is in bending as well as axial compression and tension, and the upper leveling cylinder dimensional accuracy at the rod-seal interface, so dimensional accuracy at the rod-seal interface directly affects how long the cylinder operates without leakage in service.<\/p>\n<\/div>\n

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2. 25 MPa Rated Working Pressure<\/h3>\n

Operating at 25 MPa with a proof pressure of 30 MPa, this upper leveling cylinder head assembly is built for the high-pressure circuits common in modern aerial work platforms. The 20% pressure margin above working load accommodates dynamic pressure spikes from sudden platform occupation and machine travel over rough terrain \u2014 making this upper leveling cylinder reliable even in the most demanding site conditions.<\/p>\n<\/div>\n

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3. Compact 60 mm Stroke, 375 mm Installation<\/h3>\n

The short 60 mm stroke of this upper leveling cylinder is precisely matched to the angular travel range of the platform linkage \u2014 a longer stroke would waste packaging space and add unnecessary rod exposure to the corrosive environment at the upper boom articulation. The 375 mm installation distance fits the standard upper-boom geometry of most articulated boom platforms without modification to the machine frame.<\/p>\n<\/div>\n

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4. Dual G3\/8 Port Configuration<\/h3>\n

Two G3\/8 hydraulic ports \u2014 with an alternative 2-7\/8-14 UNF thread option \u2014 give this upper leveling cylinder direct compatibility with the hose connections standardised on European-manufactured aerial work platforms, reducing on-site installation time and the risk of thread damage from mismatched fittings. The 20-degree port angling shown in the dimensional drawing ensures hoses route cleanly in the restricted space of the upper boom articulation zone.<\/p>\n<\/div>\n

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5. Heavy-Duty Clevis Mount with R30 Pins<\/h3>\n

The front and rear clevis mounts use \u03a628R1 bearing pins with R30 radius clevis eyes, providing articulated end fixings that absorb the complex loads at the boom linkage connection points without introducing bending stress into the cylinder barrel. The 2-M10 bolt pattern on the rear mount gives a positive location against rotation that plain pin fixings alone cannot provide, simplifying installation and maintaining alignment during full leveling travel.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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4. How Does the Upper Leveling Cylinder Work?<\/h2>\n

The leveling system on an aerial work platform operates on a hydrostatic master-slave principle. A lower leveling cylinder \u2014 mounted at the main boom pivot on the turntable \u2014 is mechanically linked to the boom structure so that as the boom raises or lowers, the lower cylinder automatically displaces oil in direct proportion to the boom angle change. This displaced oil is routed through dedicated leveling hoses to the upper leveling cylinder at the platform attachment joint. Because the oil displaced by the lower cylinder is precisely metered in proportion to the boom angle change, the upper leveling cylinder receives exactly the volume of oil needed to rotate the platform joint by an equal and opposite angle \u2014 keeping the platform basket level throughout the full range of boom elevation.<\/p>\n

This upper leveling cylinder mechanism functions without electronic control or solenoid valves during normal operation \u2014 the hydraulic geometry of the master-slave circuit makes the leveling automatic and continuous. The upper leveling cylinder must therefore respond smoothly and without stick-slip at any position within its 60 mm stroke. Stick-slip \u2014 caused by seal friction that is too high relative to the applied force \u2014 produces a jerkiness in platform leveling that is immediately felt by the operator and that can cause the platform to over-correct and oscillate. The precision bore finish, low-friction seals, and carefully specified radial clearance in this cylinder are all directed at eliminating stick-slip throughout the operating life of the unit.<\/p>\n

In emergency lowering mode \u2014 when hydraulic power is unavailable \u2014 some platform designs allow manual override of the leveling circuit. The upper leveling cylinder must in this case tolerate controlled back-driving without damage to seals or end fittings, a requirement that shapes the end-cap thread engagement length and the seal groove geometry visible in the cross-section drawing. The double-acting configuration of the EP upper leveling cylinder handles both extension and retraction with equal precision, ensuring that the platform remains level whether the boom is rising or descending.<\/p>\n<\/div>\n

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5. Materials and Construction<\/h2>\n

The material selection for an upper leveling cylinder used in aerial work platform service is driven by three competing requirements: high strength to handle the working and proof pressures, corrosion resistance to survive the outdoor environment typical of aerial work platforms in France and Northern Europe, and tight dimensional stability to maintain the bore and rod tolerances needed for low-friction, leak-free operation throughout the service life. Every component in this upper leveling cylinder is specified with these demands in mind.<\/p>\n

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Cylinder Barrel<\/h4>\n

Cold-drawn seamless steel tubing (20# or 45# carbon steel) with honed bore surface to Ra 0.4 \u00b5m or better. Honing creates the cross-hatched oil retention pattern essential for controlled lubrication at the piston seal contact face during reciprocating motion.<\/p>\n<\/div>\n

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Piston Rod<\/h4>\n

45# carbon steel or 40Cr alloy steel, precision-turned and induction-hardened to 50\u201360 HRC on the outer surface, then chrome-plated to 20\u201325 \u00b5m hard chrome with a final ground finish to Ra 0.2 \u00b5m or better. Hard chrome provides the wear and corrosion resistance that rod seals depend on for long service life.<\/p>\n<\/div>\n

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End Caps and Clevis Fittings<\/h4>\n

Forged or machined from 45# steel with thread engagement and seal groove dimensions calculated to maintain seal compression at 30 MPa proof pressure without gasket yielding. Clevis eyes are stress-relieved after machining to prevent fatigue cracking at the pin bore under the cyclic bending loads of platform leveling duty.<\/p>\n<\/div>\n

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Sealing System<\/h4>\n

Polyurethane rod seals, PTFE-backed piston seals, and NBR O-ring static seals \u2014 all rated for operation with mineral hydraulic oil (ISO VG 46 or 68) and hydraulic fluid temperatures from \u221225 \u00b0C to +80 \u00b0C. The wiper seal prevents ingress of the dust and grit that accumulates on outdoor construction sites in France and across the EU \u2014 a protection that directly extends the service interval of the upper leveling cylinder seal package.<\/p>\n<\/div>\n

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Surface Protection<\/h4>\n

External surfaces of the barrel and end caps receive a two-coat paint system \u2014 epoxy primer plus polyurethane topcoat \u2014 providing salt-spray resistance exceeding 480 hours to ISO 9227. The piston rod is protected by the hard chrome coating. Bare clevis bore surfaces are treated with phosphate conversion coating prior to painting to prevent corrosion in the unmachined bore before pin installation.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

\"tiltcylinder-products-Aerial<\/p>\n

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6. Application Scenarios<\/h2>\n

The upper leveling cylinder serves as the critical platform stabilisation actuator across a wide range of aerial work platform types deployed in France and across Europe. The following scenarios illustrate where this leveling hydraulic cylinder delivers the most direct operational value.<\/p>\n

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Articulating Boom Lift<\/h3>\n

On articulating boom platforms \u2014 the most common type used for building maintenance and facade work in French cities \u2014 the upper boom can articulate independently of the lower boom, requiring the upper leveling cylinder to compensate for the combined angular change of both boom sections. The 60 mm stroke of this upper leveling cylinder covers the full articulation range \u2014 the upper leveling cylinder stroke is matched specifically to the angular geometry of the upper boom pivot linkage of standard two-section boom designs without bottoming or topping out during normal operation.<\/p>\n<\/div>\n

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Telescopic Boom Lift<\/h3>\n

Telescopic boom platforms \u2014 preferred for construction work at height in French and European industrial facilities \u2014 use a single upper leveling cylinder at the platform joint to maintain level as the boom extends and retracts. The upper leveling cylinder operates at constant stroke position during extension, with corrections occurring only when boom elevation changes, making this a lower-duty upper leveling cylinder application that nonetheless demands the same sealing and structural integrity as articulated designs.<\/p>\n<\/div>\n

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Bucket Truck \/ Aerial Line Work<\/h3>\n

Utility and electrical line maintenance vehicles \u2014 known in France as camions nacelle \u2014 mount an upper leveling cylinder at the basket joint to keep linemen level while working on overhead infrastructure at up to 40 metres height. The 25 MPa working pressure of this upper leveling cylinder is appropriate for the higher-capacity bucket trucks used by ENEDIS and French telecom infrastructure contractors, where basket capacities up to 300 kg impose substantial pressure demands on the leveling circuit.<\/p>\n<\/div>\n

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Bridge Inspection Equipment<\/h3>\n

Bridge inspection platforms deployed by French road and rail infrastructure operators \u2014 including SNCF R\u00e9seau and autoroute concession holders \u2014 use articulated booms with upper leveling cylinders to position inspectors under and alongside bridge structures. In this application the boom often operates at steep downward angles, requiring the upper leveling cylinder to sustain maximum extension pressure over long periods while the inspector performs visual and NDT assessments of bridge components.<\/p>\n<\/div>\n

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Tree Care and Urban Maintenance<\/h3>\n

Municipal boom trucks used for urban tree pruning, street lamp maintenance, and sign servicing in France’s communes and agglom\u00e9rations frequently operate on sloped or uneven road surfaces where the machine levelling jack cannot fully compensate for ground irregularity. In these conditions the leveling jack cylinder at the boom head must work harder than on level ground, making the 30 MPa proof pressure safety margin particularly valuable for municipal operators who cannot control site conditions.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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7. Regulatory Compliance \u2014 France and European Markets<\/h2>\n

The upper leveling cylinder for aerial work platform applications is subject to a multi-layer regulatory framework in France and across the EU. Buyers and OEMs should verify compliance at both the component and complete-machine level before deployment in regulated working environments.<\/p>\n

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EN 280:2013+A1:2015 (France \/ EU)<\/h4>\n

The primary European standard for mobile elevating work platforms (MEWPs) governs the design, calculation, stability criteria, and testing of the complete platform including the leveling system. The upper leveling cylinder must sustain the rated load at full extension at maximum boom angle without exceeding defined deflection limits \u2014 a test condition that the 25 MPa working pressure and \u03a663 bore diameter of this cylinder are designed to satisfy.<\/p>\n<\/div>\n

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EU Machinery Directive 2006\/42\/EC<\/h4>\n

All aerial work platforms sold in France and EU member states must carry CE marking under the Machinery Directive, which requires the hydraulic system \u2014 including the leveling circuit and the upper leveling cylinder \u2014 to be documented in the technical file with pressure calculations, hose routing diagrams, and hydraulic schematic. The cylinder must demonstrate compliance with the Essential Health and Safety Requirements of Annex I covering hydraulic and pneumatic components.<\/p>\n<\/div>\n

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ISO 4413: Hydraulic Fluid Power<\/h4>\n

ISO 4413 sets the international general rules for hydraulic systems on mobile machinery including MEWPs. Its requirements for pressure rating, proof pressure testing, burst pressure factors, and hydraulic cylinder installation practices directly shape how the leveling hydraulic cylinder must be rated, tested, and installed. The proof-to-working pressure ratio of this upper leveling cylinder (30 MPa \/ 25 MPa) is specifically sized to meet the EN 280 leveling circuit proof test requirement. The upper leveling cylinder pressure rating (30 MPa \/ 25 MPa = 1.2\u00d7) complies with EN 280 leveling circuit requirements.<\/p>\n<\/div>\n

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Code du Travail (France) \u2014 Work at Height<\/h4>\n

French labour law under Articles R4323-58 to R4323-91 of the Code du Travail mandates that MEWPs used by French employers must be in conformity with applicable European standards including EN 280, undergo periodic inspection by a qualified inspector (contr\u00f4leur technique), and maintain maintenance records accessible to the inspection authorities (DREETS). The leveling system inspection records must document cylinder condition, pressure test results, and seal replacement history.<\/p>\n<\/div>\n

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ANSI A92.20 (USA Export)<\/h4>\n

For OEMs supplying aerial work platforms to the North American market, ANSI A92.20 governs MEWP design requirements, and the leveling system must satisfy the stability and leveling accuracy requirements of that standard. The 7\/8-14 UNF hydraulic port option on the EP upper leveling cylinder simplifies integration into US market hydraulic systems that use SAE port and fitting standards rather than the ISO\/DIN metric threads standard in Europe.<\/p>\n<\/div>\n

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RoHS and REACH (EU Chemical Regulations)<\/h4>\n

The surface treatment and seal materials of the upper leveling cylinder must comply with REACH regulation (EC) 1907\/2006 restrictions on hazardous substances in industrial components. Hard chrome plating is subject to REACH authorisation requirements in the EU under SVHC listing of hexavalent chromium compounds. Manufacturers supplying this cylinder to French and EU customers should be able to provide REACH compliance declarations confirming the chrome plating process meets current authorisation conditions.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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8. Related Hydraulic Products<\/h2>\n

We supply a complete range of hydraulic cylinders and components that integrate with the upper leveling cylinder in aerial work platform hydraulic systems \u2014 providing a single-source supply advantage for OEMs and service operators.<\/p>\n

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\"Tilt<\/p>\n

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Tilt Cylinder<\/a><\/h3>\n

Our tilt cylinder range covers the full spectrum of industrial and mobile machinery tilt actuation requirements \u2014 from forklift mast tilt to aerial boom tilt functions. Designed to work alongside the upper leveling cylinder in combined leveling and tilt circuit architectures, with compatible port sizing and pressure ratings for matched system integration.<\/p>\n<\/div>\n<\/div>\n

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\"Forklift<\/p>\n

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Forklift Lifting Cylinder<\/a><\/h3>\n

The lifting cylinder range covers telescopic and single-stage designs for counterbalance forklifts, reach trucks, and order pickers across the French and European materials handling market. These hydraulic cylinder components share the same manufacturing platform and seal specifications as the aerial work vehicle cylinders, ensuring consistent quality across product families for buyers sourcing multiple hydraulic cylinder types from a single supplier.<\/p>\n<\/div>\n<\/div>\n

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\"Hydraulic<\/p>\n

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Hydraulic Pump Station Series<\/h3>\n

The hydraulic pump station series includes power units configured to supply the leveling circuit and main boom circuit simultaneously, with pressure-compensated pumps and priority flow dividers that ensure the upper leveling cylinder receives priority flow during dynamic boom movements. Systems are sized to match the 25 MPa circuit pressure requirements of the EP aerial work platform cylinder range, with tank capacities, filter specifications, and heat exchangers matched to French and EU machine duty cycles.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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9. About Our Hydraulic Cylinder Manufacturing<\/h2>\n

We are a specialist hydraulic cylinder manufacturer with deep experience in the aerial work vehicle, materials handling, and industrial machinery sectors. Our engineering team has decades of combined experience in hydraulic cylinder design, and our manufacturing facility operates under a certified quality management system covering the full production cycle from raw material inspection through final pressure testing. Every upper leveling cylinder we produce undergoes dimensional verification, load testing at working pressure, load testing at working pressure, and a 100% seal leak test before dispatch, backed by documentation packages that support machine builder technical files under EU Machinery Directive requirements.<\/p>\n

We supply hydraulic cylinder components to OEMs, distributors, and maintenance operators across France, the EU, and internationally. Our commitment to on-time delivery, precise conformance to drawing specifications, and responsive technical support has made us a preferred supplier for aerial work platform manufacturers and service organisations in the French market where equipment downtime during maintenance windows carries significant contractual penalty exposure. Custom upper leveling cylinder configurations \u2014 including non-standard stroke lengths, port positions, and special rod end geometries \u2014 are available for OEM volumes with full traceability documentation.<\/p>\n<\/div>\n

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Frequently Asked Questions<\/h2>\n
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\nQ1. What is the correct upper leveling cylinder specification for a French aerial work platform requiring a 60 mm stroke and 25 MPa working pressure?<\/summary>\n
The EP-\u03a640\u00d7\u03a625\u00d7100\u00d72 upper leveling cylinder with model reference HCYY11112008 meets those requirements directly. It provides a \u03a663 bore, \u03a645 rod, 60 mm stroke, 25 MPa working pressure \u2014 specifications that make this upper leveling cylinder the direct replacement, and 30 MPa maximum withstand pressure \u2014 the specification set required by most modern articulating and telescopic boom platforms in the French market operating to EN 280 requirements.<\/div>\n<\/details>\n<\/div>\n
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\nQ2. How does an upper leveling cylinder work on an aerial work platform, and what happens if it fails during operation?<\/summary>\n
An upper leveling cylinder on an aerial work platform operates on a master-slave hydrostatic circuit principle. When the upper leveling cylinder fails, \u2014 the lower leveling cylinder tracks boom angle mechanically and displaces oil to the upper leveling cylinder at the platform joint to generate an equal and opposite rotation, keeping the basket level. If the upper leveling cylinder fails \u2014 typically through seal extrusion causing internal bypass, or a fractured rod causing full extension \u2014 the platform will tilt progressively as the boom moves. Most modern platforms incorporate a flow restrictor and counterbalance valve in the leveling circuit that limits uncontrolled platform tilt rate in the event of cylinder failure, but the machine must be immediately lowered and taken out of service for repair.<\/div>\n<\/details>\n<\/div>\n
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\nQ3. Where can I find a reliable upper leveling cylinder supplier for aerial work platform maintenance in France?<\/summary>\n
Reliable supply of upper leveling cylinders for French market MEWP maintenance should be sourced from manufacturers who can provide: (1) full dimensional conformance to OEM drawings or equivalent replacement specifications; (2) documentation packages supporting CE and EN 280 technical files; (3) lead times compatible with MEWP maintenance windows; and (4) seal and material specifications aligned with the hydraulic fluid and temperature range of the original machine. Contact our team with your OEM part number or upper leveling cylinder dimensions and we will confirm cross-reference availability and lead time for France delivery.<\/div>\n<\/details>\n<\/div>\n
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\nQ4. How much weight can a hydraulic cylinder lift in a typical aerial work platform leveling circuit?<\/summary>\n
The force output of a hydraulic cylinder is calculated as: Force = Pressure \u00d7 Bore Area. For this upper leveling cylinder at 25 MPa working pressure with a \u03a663 mm bore, the theoretical extension force is approximately 77.7 kN (roughly 7.9 tonnes). In practice the usable force in the leveling circuit is determined by the platform payload rating, the boom geometry at maximum angle, and the counterbalance valve setting \u2014 typically much lower than the cylinder’s theoretical maximum. Upper leveling cylinders in this bore class are routinely used on platforms rated for 200\u2013400 kg basket capacity at full boom extension.<\/div>\n<\/details>\n<\/div>\n
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\nQ5. What is the difference between an upper leveling cylinder and a standard double-acting hydraulic cylinder in aerial work vehicle systems?<\/summary>\n
An upper leveling cylinder is a double-acting hydraulic cylinder applied in a specific master-slave circuit architecture that makes platform leveling automatic. The upper leveling cylinder terminology that makes the leveling correction automatic \u2014 no separate control signal or solenoid valve is needed for the leveling function during normal boom movement. The term “self leveling” refers to the system behaviour, not a special feature of the cylinder itself. The hydraulic cylinder components \u2014 bore, rod, seals, end caps \u2014 are standard double-acting designs, but they are sized and specified with particular attention to zero-stick-slip operation across the full stroke, which is more demanding than a general-purpose double-acting cylinder application.<\/div>\n<\/details>\n<\/div>\n
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\nQ6. How do you equalise hydraulic cylinders in a boom platform leveling system, and what role does the upper leveling cylinder play?<\/summary>\n
Equalising hydraulic cylinders in an aerial work platform leveling system means ensuring that the oil displaced by the master (lower) cylinder exactly matches the oil received by the slave (upper leveling cylinder) across the full stroke range, so that the platform correction angle precisely equals the boom angle change. This is achieved by matching the effective piston areas of the upper and lower cylinders to the geometric ratio of the boom linkage. Any mismatch in piston area \u2014 from manufacturing tolerance or cylinder replacement with a non-conforming bore size \u2014 introduces a systematic leveling error that accumulates with boom angle. This is why exact bore diameter conformance is critical when sourcing replacement upper leveling cylinders for aerial work platforms for aerial work platforms.<\/div>\n<\/details>\n<\/div>\n
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\nQ7. What inspection and maintenance schedule should a French MEWP operator follow for the upper leveling cylinder under Code du Travail requirements?<\/summary>\n
Under Code du Travail Articles R4323-58 to R4323-91, French employers must have MEWPs inspected by a qualified competent person (personne comp\u00e9tente) at least annually, with a general periodic inspection (v\u00e9rification g\u00e9n\u00e9rale p\u00e9riodique) every 6 months for machines used in France. The upper leveling cylinder specifically should be inspected at each service for rod surface condition. A worn upper leveling cylinder rod seal (corrosion, scoring), external seal leakage at the rod seal and port connections, and overall operation by cycling the boom through the full elevation range and confirming platform level is maintained within the tolerance specified in the machine manual \u2014 typically \u00b15\u00b0 from level.<\/div>\n<\/details>\n<\/div>\n
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\nQ8. Which hydraulic fluid is compatible with the seals in this upper leveling cylinder, and can it be used with biodegradable hydraulic oil?<\/summary>\n
The standard seal package \u2014 polyurethane rod seals, PTFE-backed piston seals, NBR O-rings \u2014 is compatible with mineral hydraulic oil ISO VG 46 and ISO VG 68, which are the most commonly used grades in French aerial work platform hydraulic systems. For applications requiring biodegradable hydraulic fluid (HETG, HEES, or HEPG types) \u2014 increasingly specified for work near waterways and in environmentally protected areas in France \u2014 an alternative seal kit using FKM (Viton) seals or EPDM seals appropriate to the fluid type should be specified at time of order. Contact our technical team to confirm the correct upper leveling cylinder seal specification for your hydraulic fluid type.<\/div>\n<\/details>\n<\/div>\n
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\nQ9. What is the typical cost and lead time for a replacement upper leveling cylinder for an aerial work vehicle used by a French MEWP hire company?<\/summary>\n
We do not publish pricing on this page because the delivered cost of an upper leveling cylinder for MEWP applications in France varies by configuration, port thread specification, quantity, and the documentation package required. We can generally quote within 24 hours of receiving a confirmed specification \u2014 either an OEM part number or a full dimensional drawing. Lead times for standard stock dimensions are typically 5 to 15 working days to French or EU ports; custom configurations or non-standard bore\/stroke combinations require 3 to 6 weeks depending on production schedule. Contact us with your requirements and we will provide a firm quote.<\/div>\n<\/details>\n<\/div>\n
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\nQ10. How does the upper leveling cylinder head design affect the long-term sealing performance of the upper leveling cylinder in outdoor aerial work applications?<\/summary>\n
The upper leveling cylinder head \u2014 the front end cap that guides and seals the piston rod \u2014 is the component most exposed to external contamination in outdoor aerial work platform service. A well-designed head incorporates a primary polyurethane rod seal, a secondary rod seal or backup ring, and a wiper seal in sequence. The wiper removes particulate and moisture from the rod surface before it contacts the primary seal, preventing abrasive contamination from reaching the seal lip where it would accelerate wear. The head body itself must be machined to hold the seal groove dimensions accurately \u2014 oversize grooves allow seal rocking that causes early fatigue failure of the lip, and undersize grooves over-compress the seal and increase friction to the level where platform leveling shows stick-slip.<\/div>\n<\/details>\n<\/div>\n<\/div>\n<\/div>\n

Editor: PXY<\/p>","protected":false},"excerpt":{"rendered":"

Aerial Work Vehicle | Hydraulic Leveling System EP-\u03a640\u00d7\u03a625\u00d7100\u00d72 Upper Leveling Cylinder For Aerial Work Vehicle Precision-engineered upper leveling cylinder designed to maintain platform horizontality on boom-type aerial work platforms \u2014 ensuring operator safety, regulatory compliance, and reliable performance across construction, maintenance, and infrastructure applications throughout France and the wider European market. Lifting Cylinder\u00a0 Request a […]<\/p>","protected":false},"featured_media":1789,"comment_status":"open","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[1145],"product_tag":[],"class_list":["post-1786","product","type-product","status-publish","has-post-thumbnail","product_cat-upper-leveling-cylinder","first","instock","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/tiltcylinder.com\/ms\/wp-json\/wp\/v2\/product\/1786","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tiltcylinder.com\/ms\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/tiltcylinder.com\/ms\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/tiltcylinder.com\/ms\/wp-json\/wp\/v2\/comments?post=1786"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/tiltcylinder.com\/ms\/wp-json\/wp\/v2\/media\/1789"}],"wp:attachment":[{"href":"https:\/\/tiltcylinder.com\/ms\/wp-json\/wp\/v2\/media?parent=1786"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/tiltcylinder.com\/ms\/wp-json\/wp\/v2\/product_brand?post=1786"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/tiltcylinder.com\/ms\/wp-json\/wp\/v2\/product_cat?post=1786"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/tiltcylinder.com\/ms\/wp-json\/wp\/v2\/product_tag?post=1786"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}