SG CAT773E Dump Truck Rear Suspension Cylinder 223-4392

The SGCAT773E Rear Suspension Cylinder is a critical chassis component engineered for the Caterpillar 773E Off-Highway Truck. Designed as a direct replacement for OEM Part Number 223-4392, this suspension strut plays a vital role in absorbing haul road impacts and supporting the truck’s loaded weight.

Unlike standard hydraulic cylinders, this Nitrogen/Oil Suspension Group is precision-manufactured to maintain optimal ride height and stability. It effectively dampens vibration to protect the frame from fatigue and ensure operator comfort during high-speed haulage cycles.

Technical Specifications

Key Features & Ride Control

• Superior Shock Absorption: Engineered to handle the dynamic loads of a fully loaded 773E truck (approx. 100 tons GMW). The internal valving is calibrated to match OEM damping characteristics for smooth ride control.

• Leak-Proof Nitrogen Seal: Features a specialized multi-lip sealing system designed to separate and contain the high-pressure nitrogen gas and hydraulic oil, preventing internal mixing and suspension collapse.

• Chrome-Plated Durability: The piston rod is heavily chrome-plated and polished to resist rock pitting and corrosion from mud and water spray, ensuring the seals last longer in wet mining conditions.

• Direct Installation: Manufactured to exact 223-4392 dimensions for seamless mounting to the truck frame and axle housing.

Applications

• Open-pit mining haulage

• Quarry material transport

• Heavy construction site logistics