HCYY11112003 Lifting Cylinder for Aerial Work Vehicles

18 MPa — Working Pressure

The maximum continuous pressure the lifting cylinder operates at during normal use. The hydraulic pump and relief valve are set to deliver up to 18 MPa to the cylinder during platform raising. At this pressure, the Φ65 bore produces approximately 59.7 kN (6.1 tonnes-force) of extension force — sufficient to raise the platform, structure, and rated personnel load through the full stroke of 840 mm. The cylinder is designed to operate at this pressure for the full service life of the machine without fatigue or seal degradation.

27 MPa — Maximum Withstand Pressure

The highest pressure the cylinder housing, rod, seals, and ports can safely withstand without permanent deformation or seal damage. This is 1.5× the working pressure — the standard proof test ratio for hydraulic cylinders. Transient pressure spikes can occur during operation (for example, if the platform is loaded beyond its rated capacity, or if the lowering valve closes abruptly during descent). The 27 MPa rating ensures these spikes do not cause cylinder failure. Korea Ever-Power proof-tests every HCYY11112003 at 27 MPa before shipment.

The Aftermarket Challenge

AWV dealer networks may not carry hydraulic cylinders in stock — these are low-volume, high-value items. When a lifting cylinder fails, ordering from the OEM factory can add 4–8 weeks. During that time, the aerial work vehicle is grounded, and the lost rental revenue or project downtime can exceed the cylinder's replacement cost.

The Korea Ever-Power Solution

Korea Ever-Power holds the HCYY11112003 dimensional data (Φ65×Φ45×840, 18/27 MPa, 1075 mm installation distance, 27 kg) in its validated database — no engineering review delay. Typical lead time: 2–3 weeks for a single unit. For fleet operators, annual blanket agreements with planned call-off scheduling provide the shortest lead times and the best unit pricing.

Is the HCYY11112003 the same cylinder as the HCYY11112006?

No. Both are lifting cylinders for aerial work vehicles, but they serve different AWV models with different dimensional specifications. The HCYY11112003 is Φ65×Φ45×840 at 18 MPa; the HCYY11112006 has different dimensions for a different platform. Always order by the exact part number stamped on the cylinder you are replacing.

Can I order the HCYY11112003 together with other HCYY AWV cylinders for a complete overhaul?

Yes — and this is recommended for major service. Order the full set of HCYY AWV cylinders for your specific platform in one order. All are manufactured on the same production line, with the same seal brand, in the same batch. Shipped in one consolidated crate, reducing shipping cost. Total installation time for a complete cylinder overhaul is 1–2 days — far more efficient than replacing cylinders individually over months as they fail one by one.

What seal upgrade do you recommend for dusty construction-site use?

For outdoor use in dusty or abrasive environments, specify Parker or Hallite PTFE rod seals. Standard polyurethane seals last 3,000–5,000 hours in clean indoor environments but may wear in 1,500–2,500 hours on construction sites. PTFE rod seals have significantly better abrasion resistance and can extend the service interval to 4,000–6,000 hours in the same conditions. Contact Korea Ever-Power with your operating environment for a specific seal recommendation.

What does the 27 MPa maximum withstand pressure mean in practice?

It means the HCYY11112003 is proof-tested at 27 MPa (1.5× the 18 MPa working pressure) before shipment. This test confirms the housing, seals, and rod can survive transient pressure spikes without leakage or deformation. In daily use, the cylinder should never reach 27 MPa — the system relief valve limits the pressure to approximately 18–20 MPa. If the working pressure regularly exceeds 18 MPa, the hydraulic system has a fault (typically an overloaded platform or a relief valve set too high) that should be diagnosed before the cylinder is stressed beyond its design intent.

We operate 8 scissor lifts in a logistics park. The lifting cylinder on unit #3 started leaking at about 4,800 hours. The OEM dealer quoted 6 weeks and a premium price. Contacted Ever-Power — they confirmed the HCYY11112003 dimensions (Φ65×Φ45×840) within a day and delivered in 18 days. Perfect fit. Drift test passed with zero measurable descent at rated load. We've since ordered the steering cylinder (HCYY11112004) for unit #5 — same experience. Planning to consolidate all HCYY cylinder replacements with Ever-Power going forward.

We rent out AWVs across the UAE. The lifting cylinders are our #1 replacement item — the construction dust in this region is brutal on rod seals. We asked Ever-Power to build the HCYY11112003 with NOK FKM seals for better dust and heat resistance. Seal life improved from approximately 2,500 hours to over 5,000 hours so far and still going. We've ordered 6 units over the past 4 months. The HCYY part number ordering is simple — no ambiguity, just quote the number and receive the correct cylinder.

Good cylinder, correct dimensions, works as expected on our scissor platform. Delivery took 24 days to São Paulo — a bit longer than the 2–3 weeks quoted, but still much faster than the OEM channel which quoted 8+ weeks. Product quality is solid. Four stars because of the delivery variance — the cylinder itself deserves five.

Ordered the complete AWV cylinder set — HCYY11112003, 004, and 005 — for a boom lift at 9,500 hours. All three arrived together, individually packaged with port caps and test certificates. Our technicians installed everything in one day. The machine feels new again. Total cost for 3 cylinders from Ever-Power was about 50% of what the OEM dealer quoted for just the lifting cylinder alone. Remarkable value.