SK220LC IV SK220 IV Hydraulic Boom Cylinder for Kobelco Excavator Spare Parts

This heavy-duty boom hydraulic cylinder is engineered as a direct drop-in aftermarket replacement for Kobelco SK220 IV standard track and long-track SK220LC IV medium excavators. As the core lifting power component of the front working mechanism, it undertakes boom lifting, lowering and load-bearing work for earthmoving, road construction, stone loading and medium quarry operations. It is widely favored by machinery repair yards, medium-sized equipment rental fleets and construction spare parts dealers focusing on Kobelco fourth-generation excavators.

All products are manufactured strictly following original Kobelco design drawings and dimensional standards. Mounting hole spacing, lug width and hydraulic port positions are fully consistent with OEM specifiions. No cutting, grinding or welding modifiion is required during on-site replacement, effectively shortening maintenance downtime.

1. Dual Model Universal Matching for SK220 IV Series

   This cylinder fits both standard-track SK220 IV and long-track SK220LC IV without dimensional mismatch. Every connecting size is identical to the original 2438U1135F1 cylinder, perfectly docking original boom linkages and hydraulic pipelines, avoiding seal wear and oil leakage caused by forced assembly.

2. Construction Site Reinforced Wear-Resistant Structure

   The barrel and lug plates are thickened and upgraded for long-term heavy-load construction scenarios such as road earthwork and stone yards. It effectively resists frequent heavy bearing loads and accidental collision abrasion with rock and concrete, greatly extending the overall service life compared with ordinary aftermarket cylinders.

3. Two-Round Strict Offline Testing to Eliminate Hidden Leakage Risks

   Each finished cylinder will pass full-stroke reciproing fatigue testing to verify structural stability, matched with high-pressure soaking airtight inspection. All products with internal or external oil leakage problems are eliminated before packaging, preventing unexpected construction shutdown losses for customers.

4. High Cost Performance for Medium Fleet Operators

   It reaches the same structural strength, operating smoothness and service cycle as genuine Kobelco OEM parts at a far more competitive price, significantly reducing long-term repeated spare parts procurement costs for medium-sized rental companies and independent repair shops.

5. Multi-Mode Global Logistics Solutions to Meet Different Delivery Needs

   In-stock products can be delivered within 3 working days. Air freight channels support emergency rush orders for sudden site breakdowns; bulk sea consolidation and full-container FCL services provide cost-saving wholesale transport solutions for African, Southeast Asian and Middle Eastern construction machinery markets.

Our factory has more than 10 years of specialized production experience in hydraulic cylinders for Kobelco medium excavators, covering classic fourth-generation SK220 IV / SK220LC IV models. We own complete supporting production lines including heavy forging, precision honing, heat treatment and chrome plating, equipped with professional test benches to simulate real construction heavy-load working conditions for product optimization. Our aftermarket hydraulic cylinder series is exported to multiple regions around the world all year round, and has accumulated stable market reputation and continuous positive reviews from global construction machinery spare parts distributors relying on precise compatibility and stable quality.

Q1: Can this boom cylinder be installed on SK220 III or SK230 IV excavators?

A: Not interchangeable. Excavators of different generations and models adopt exclusive part numbers and unique mounting structural dimensions. Please confirm the complete machine model before placing an order.

Q2: Does the standard package come with a matching seal repair kit?

A: The standard package only includes the complete boom cylinder assembly. The dedied 2438U1135F1 sealing kit needs to be purchased separately. We can offer a preferential combined quotation for cylinder + seal kit orders.

Q3: What protective measures are used for long-distance sea transportation?

A: Anti-rust hydraulic oil is injected into the cylinder inner cavity for internal anti-corrosion; the entire piston rod surface is evenly coated with anti-rust grease. The cylinder is wrapped with multi-layer thick waterproof PE film and placed into reinforced thick plywood export cases to prevent scratches, impact deformation and moisture erosion during long ocean transit.

Q4: Will there be tiered volume discounts when purchasing a full set of boom, arm and bucket cylinders for SK220 IV series?

A: Yes. Complete working device cylinder set orders enjoy gradient bulk discounts. Consolidated full-container sea shipping service is also available to cut overall international logistics expenses for large orders.

Q5: What after-sales support is available if oil leakage occurs within the 12-month warranty period?

A: Please provide clear photos of the leakage position and the excavator serial number for verifiion. We will send free replacement seal accessories and detailed remote maintenance operation guidance in a timely manner to solve the failure