KOMATSU PC1250-8 EXCAVATORS FINAL DRIVE ASSEMBLY 21N-27-00130 21N-60-34100 FINAL

The Final Drive (Part Nos. 21N-27-00130 and 21N-60-34100) for the Komatsu PC1250-8 hydraulic mining shovel is an ultra-heavy-duty travel propulsion unit engineered for large-scale open-pit mining and heavy earthmoving operations in the 120-ton machine class. This assembly integrates a massive high-displacement axial piston hydraulic motor with an extremely rugged multi-stage planetary reduction gearbox, delivering extraordinary tractive effort and reliable travel performance under continuous extreme-load conditions. Designed as a direct OEM replacement, these assemblies ensure precise fitment and factory-specified hydraulic performance for the PC1250-8 model.

• North America & South America: Engineered for large-scale open-pit copper, gold, coal, and oil sands mining operations, with reinforced housing and enhanced sealing to withstand extreme temperature variations, abrasive slurry, and continuous high-cycle operation.
• Australia & Oceania: Equipped with heavy-duty floating seals that resist ingress of highly abrasive quartz-rich soils, red dust, and laterite materials common in iron ore and coal mining environments.
• Africa & Middle East: High-temperature seals and corrosion-resistant materials protect against sand erosion, thermal stress, and airborne particulate contamination in arid desert and semi-arid mining regions.

• Ultra-High Torque Capacity: The massive displacement axial piston motor delivers extraordinary starting torque and smooth power transmission, enabling the PC1250-8 to maneuver efficiently on steep mine ramps, soft overburden, and uneven bench floors.
• Heavy-Duty Multi-Stage Planetary Reduction: The gearbox employs case-hardened alloy steel planetary gears with precision-ground tooth profiles, ensuring uniform load distribution across multiple stages and maximizing service life between major rebuilds.
• Dual Part Number Configuration: Designed with both assembly-level (21N-27-00130) and motor-level (21N-60-34100) component references, providing flexibility for complete final drive replacement or individual motor servicing.
• Super-Class Structural Integrity: The ductile iron housing features massive reinforced ribbing and stress-relieved construction to resist structural fatigue under continuous shock loading from tramming over rough mine floors. Dual-cone floating seals with heavy-duty dust wipers provide robust protection against contamination in the harshest environments.
• Precision OEM Replacement Fit: All mounting bolt patterns, pilot diameters, spline connections, and hydraulic port locations match original Komatsu specifications for the PC1250-8 model, enabling seamless installation with minimal machine downtime.

Guangzhou Tieqi Construction Machinery Co., Ltd. (IRON CAVALRY) is strategically located in Guangzhou's Huangpu District. With nearly 15 years of experience, we specialize in engineering machinery hydraulics and are committed to delivering practical solutions.

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For large items, we use sturdy plywood crates secured with metal fasteners. Products are cushioned with bubble wrap and secured with wooden braces, with special attention given to protecting vulnerable parts. External reinforcement includes high-strength PET plastic strapping and waterproof wrapping.

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