The truck crane rear rack cylinder is the primary hydraulic component responsible for the horizontal expansion of the stabilizer beams. Positioned within the rear chassis box, the EPYY11112026 model drives the horizontal “racks” outward, allowing the crane to safely engage its vertical jacks on a wider foundation. This outrigger extension cylinder is critical for maintaining anti-tilt safety during heavy telescopic boom maneuvers.

Featuring a specialized complex fluid routing system, this actuator is designed for the tight confines of modern mobile crane frames. Despite its ultra-lightweight 9kg frame, it provides 12MPa of working pressure, making it a highly responsive horizontal slide ram that resists the friction and resistance inherent in heavily loaded outrigger assemblies.

The EPYY11112026 operates as a double-acting horizontal actuator. Integrated behind the rear outrigger beam, it uses its 635mm stroke to push the support rack outward. By utilizing a slender Φ40mm bore, it minimizes oil consumption and heat generation while maintaining high deployment speeds.

Precision Fluid Routing: A unique feature of this cylinder is the complex external hard-piping. This design ensures that hydraulic fluid reaches the manifold ports with zero hose entanglement or chafing within the dark, debris-filled outrigger housing.

Blueprint Anatomy: The CAD drawing details an 840mm installation profile with dual clevis mounting points. The induction-hardened Φ25mm rod is designed for high columnar strength, ensuring the actuator can overcome the friction of rust or excessive grease buildup on the stabilizer tracks without buckling.

18MPa Surge Redundancy

While operating at 12MPa, our 18MPa withstand rating prevents barrel distortion if the outrigger beam strikes a hidden obstacle during extension.

635mm Precision Reach

Calibration-matched for rear outrigger boxes, ensuring the racks extend to their full intended width for maximum machine stability.

9kg Ultra-Light Build

Optimized for rear-chassis mounting, the 9kg build minimizes rear-axle overload while providing industrial-grade horizontal slide force.

Hard-Pipe Manifold

The integrated external piping layout eliminates hose abrasion and “hose-rub” leaks within the congested outrigger housing.

Reliable outrigger extension requires superior wear resistance. As an elite Truck Crane Cylinder Manufacturer, we utilize ST52.3 (E355) high-yield strength tubing to ensure the EPYY11112026 survives the harsh environments of roadside construction.

The Φ40mm internal bore is roller-burnished to an mirror Ra 0.2µm finish. This process minimizes dynamic friction during the 635mm stroke, preventing premature seal wear caused by hydraulic fluid temperature spikes during repetitive deployment cycles.

• Quenched Φ25mm Rod: Forged from high-tensile 45# carbon steel, induction-hardened for impact resistance, and coated in 40µm of hard chrome.
• NOK Zero-Leak Seals: Fitted with Japanese NOK multi-lip seals to ensure zero internal fluid bypass and absolute rack positioning.
• 100% Quality Assurance: Every 9kg unit must pass a rigorous 18MPa hydrostatic hold test before dispatch to global job sites.

The EPYY11112026 enabling rapid and precise horizontal outrigger extension for mobile fleets.