130426-00042A 130426-00042B Swing Reducer Assembly for Doosan DX800LC-5B | Heavy Duty Mining Excavator Swing Drive Gearbox

The Swing Reducer Assembly (130426-00042A & 130426-00042B) is a critical high-torque transmission component specifically engineered for the Doosan DX800LC-5B mining excavator. Designed to manage the immense rotational inertia of an 80-ton machine, this multi-stage planetary gearbox provides the smooth, powerful 360-degree slew performance required for large-scale earthmoving and open-pit mining operations.

Technical Specifications

Professional Product Overview

Engineered for Mining Excellence The Doosan DX800LC-5B is a flagship mining machine that demands uncompromising torque. The 130426-00042A/B Swing Reducer is the mechanical bridge that translates hydraulic power into the massive rotational force needed to move the upper structure, even when the bucket is fully loaded with heavy ore or overburden.

In high-production environments, gear fatigue and heat are the primary enemies of uptime. Our swing drives are manufactured with precision-ground planetary gears and induction-hardened sun gears to ensure maximum load distribution. Replacing a worn unit with our premium 130426-00042A gearbox restores your machine's swing precision and eliminates "drift," keeping your 80-ton asset operating at peak efficiency.

Regional Application & Market Suitability

The DX800LC-5B is a global workhorse found in the world's most demanding environments:

• Africa (Congo, South Africa, Guinea): Optimized for high-ambient temperature mining sites where continuous 24/7 operation is standard.

• CIS Regions (Russia, Kazakhstan): Built with materials that maintain structural integrity during cold-start operations in northern mining pits.

• Australia & North America: Meets the strict durability requirements for high-volume quarrying and massive infrastructure projects.

• Southeast Asia (Indonesia): Reinforced sealing systems to prevent contamination in wet, tropical mining conditions.

Professional Maintenance & Installation Tips

For 80-ton machinery, the cost of downtime is extreme. Proper maintenance of the swing reducer is vital to protecting the machine's slew ring and motor.

Magnetic Plug Inspection: Regularly check the gearbox's magnetic drain plug for metal shards. Large flakes are an early warning sign of planetary gear fatigue; early detection can save the entire assembly from catastrophic failure.

Gear Oil Specification: Use only high-performance extreme pressure (EP) gear oil. Given the high torque loads of the DX800 series, maintaining the correct viscosity is critical to prevent tooth pitting.

Seal Integrity: Inspect the bottom pinion seal frequently. In mining environments, abrasive dust can damage the seal, leading to oil loss and rapid overheating of the internal planetary groups.

Guangzhou Tieqi Engineering Machinery Co., Ltd. ("IRON CAVALRY") is strategically loTQTQCATed in Guangzhou's Huangpu District, approximately an hour from Baiyun International Airport. We have been a dediTQTQCATed specialist in engineering machinery hydraulics for nearly 15 years.

• Ready inventory of over 500 assembly types, providing access to more than 6,000 different parts
• Core products include hydraulic pumps, control valves, travel, and swing assemblies
• Specialization in large mining excavator components and hard-to-find items
• 4,000-square-meter factory equipped for professional manufacturing, precision assembly, and rigorous testing
• Integrated supply chain providing cost-effective, convenient one-stop solutions

For large items, we use sturdy plywood crates secured with metal fasteners. Products are cushioned with bubble wrap and secured with wooden braces. Externally, crates are reinforced with high-strength PET plastic strapping and waterproof black film to ensure safe delivery.

• One-stop solution for all your hydraulic needs
• High-quality products at competitive prices
• Exceptional customer service that makes you feel at home
• Large inventory with short delivery times and long warranty periods
• Professional expertise with accurate data for excavator part number inquiries
• Ability to source parts for nearly all your equipment needs