The EPYY11112027 truck crane rear outrigger cylinder is a specialized vertical actuator integrated into the rear chassis stabilizers. Its primary function is to extend the outrigger pads to the ground, leveling the machine and transferring its weight to a stable footprint. This stabilization jack cylinder is the backbone of safe lifting, ensuring that the crane’s center of gravity remains secure even when working at maximum outreach.

Built with a Φ70mm bore and Φ55mm rod, this model offers an exceptional strength-to-weight ratio. It serves as a high-performance aftermarket replacement for global mobile crane brands, featuring a 640mm installation distance and a reinforced mounting block design optimized for the dynamic vibrations of active job sites.

The EPYY11112027 functions as a vertical double-acting hydraulic jack. Integrated into the rear stabilizer boxes, it uses system pressure to extend the outrigger beam pads downward. By establishing firm ground contact, it ensures that the chassis remains horizontal, providing the necessary leverage for the crane’s telescopic boom to function safely.

Hydraulic Performance: Supplying 20MPa to the Φ70mm bore generates the stable force required to level medium-to-heavy mobile equipment. The thick Φ55mm rod is specifically engineered to provide extreme columnar strength, preventing any risk of buckling when the cylinder is under full compression from the machine’s rear weight.

Blueprint Anatomy: The CAD drawing details a robust mounting block design at the cylinder base, which distributes load evenly into the outrigger beam. A specialized spherical rod end allows the outrigger pad to adapt to sloped or uneven ground, preventing destructive lateral forces on the internal seal matrix.

30MPa Overload Redundancy

Stabilizers face violent hydraulic shocks during heavy lifts. Our 30MPa withstand rating ensures the steel barrel remains immune to swelling.

Zero-Drift High-Pressure Seals

Utilizing imported Japanese NOK multi-lip seals to eliminate internal fluid bypass, maintaining a perfectly level chassis for hours of site operation.

Anti-Buckling Φ55mm Rod

The high-tensile 55mm rod is induction-hardened to provide unparalleled columnar strength, critical for preventing buckling under full vertical load.

Compact 24kg Integration

The ultra-slender build minimizes rear-chassis weight, maintaining the machine’s center of gravity for safe road travel between jobsites.

Establishing stability for high-reach lifting requires uncompromised metallurgy. As an elite Heavy-Duty Outrigger Cylinder Manufacturer, we utilize ST52.3 (E355) high-yield strength seamless steel to ensure the EPYY11112027 outlasts the equipment it serves.

The Φ70mm internal bore is roller-burnished to an absolute mirror finish of Ra 0.2µm. This minimizes dynamic friction during outrigger deployment, preventing thermal seal degradation even in dusty environments where abrasive grit is present.

• Quenched Φ55mm Rod: Forged from high-tensile 45# carbon steel and coated in 40µm of hard chrome for maximum impact resistance.
• Robotic Joint Welding: Mounting blocks and ports are fused via multi-pass robotic SAW welding, validated by ultrasonic NDT for zero porosity.
• 100% Quality Assurance: Every 24kg unit undergoes a mandatory 30MPa hydrostatic hold test before being cleared for dispatch.

The EPYY11112027 providing rock-solid foundation stability for the world’s most productive mobile fleets.