Komatsu PC1600-1 PC1800-6 Final Drive Assembly | Travel Motor 21T-27-00113

• Ultra-High Torque Density: Large-diameter planetary gears and reinforced sun shaft with splined input provide maximum torque multiplication for demanding swing and track drive applications in tough digging conditions
• Seamless Direct Integration: All mounting bolt patterns, pilot register dimensions, dowel pin locations, and hydraulic port configurations exactly match original Komatsu specifications for true bolt-on replacement without adapter plates or line modifications
• Enhanced Structural Integrity: Heavy-wall ductile iron housing with integrated reinforcing ribs resists structural deflection and maintains gear alignment under extreme side-loading during trenching and benching operations
• Advanced Internal Lubrication: Optimized oil distribution channels within the planet carrier ensure consistent forced lubrication to all bearings and gear meshes, even during continuous high-load swing cycles

• Case Drain Line Management: Ensure the motor case drain line is routed independently to the hydraulic tank with no shared connections. Sustained back pressure above 15 psi will accelerate output shaft seal wear and potentially cause internal bypass. Monitor return line filter condition and perform oil analysis every 250 hours.
• Gear Oil Replacement Schedule: Change final drive gear oil at 250 hours for initial break-in, then every 500 hours or quarterly. Use extreme pressure gear oil SAE 80W-140 or Komatsu specified lubricant. Inspect drained oil for copper particles indicating bushing wear or steel debris indicating gear or bearing distress.
• Mounting Bolt Torque Protocol: Always install new mounting bolts with high-strength thread locking compound. Clean bolt threads and blind holes thoroughly with solvent and compressed air. Tighten in progressive diagonal stages to manufacturer specification of 1,600 ± 100 N*m using a calibrated torque multiplier.
• System Priming and Air Purge: Before initial startup after installation or extended downtime, fill the motor housing completely with clean hydraulic oil through the uppermost port until oil steadily flows from the case drain opening. Rotate the final drive slowly by hand or at idle speed for several minutes to eliminate trapped air pockets, preventing cavitation damage and ensuring immediate component lubrication at startup.

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 and upholding our responsibilities.

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Professional Team

We maintain a ready inventory of over 500 assembly types, providing access to more than 6,000 different parts. Hydraulic pump, control valve, travel, and swing assemblies are our core products, with particular expertise in large mining excavator components and hard-to-find items.

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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• One-stop solution provider for all hydraulic component needs
• High-quality products at competitive prices
• Exceptional customer service and support
• Large inventory, short delivery times, and long warranty periods
• Professional expertise with accurate part number identification