KOMATSU PC400-7 / PC400-8 EXCAVATORS FINAL DRIVE ASSEMBLY 208-27-00312 208-27

The Final Drive Assembly (Part Nos. 208-27-00312 and 208-27-00311) for Komatsu PC400-7 and PC400-8 excavators is a heavy-duty travel propulsion unit engineered for large-scale mining, quarry operations, and major earthmoving projects in the 40-ton machine class. This assembly integrates a high-displacement axial piston hydraulic motor with a rugged multi-stage planetary reduction gearbox, delivering exceptional tractive effort and reliable travel performance under continuous heavy-load conditions.

• North America & South America: Engineered for large-scale open-pit mining, quarry operations, and heavy infrastructure projects, with reinforced housing and enhanced sealing to withstand extreme temperature variations, abrasive materials, 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.

• High-Displacement Torque Delivery: The axial piston motor design provides substantial starting torque and smooth power transmission, enabling efficient tracking on steep mine ramps, soft overburden, and uneven bench floors.
• 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 Compatibility: Engineered to accommodate both 208-27-00312 and 208-27-00311 specifications, providing flexibility for fleet maintenance and ensuring correct fitment for left-hand and right-hand drive positions.
• Cross-Model Compatibility: Designed to fit both PC400-7 and PC400-8 excavator models, reducing inventory complexity for mixed fleets and enabling straightforward swaps between machine generations.
• Mining-Grade Structural Integrity: The ductile iron housing features massive reinforced ribbing and stress-relieved construction to resist structural fatigue under continuous shock loading.

• Hydraulic System Care: Routinely inspect case drain lines for restrictions, kinks, or blockages. Maintain strict hydraulic fluid cleanliness standards and replace return filters at prescribed intervals.
• Gear Oil Management: Fill the planetary housing with recommended extreme-pressure gear oil. Change oil every 250-500 operating hours under normal conditions, and every 250 hours in severe applications.
• Mounting Bolt Protocol: Always fit new high-strength bolts with thread locking compound and torque to factory specifications to prevent loosening from extreme vibration.
• Pre-Operation Priming Procedure: Before initial startup, fill the motor housing with clean hydraulic oil and run the machine at low idle to ensure complete lubrication of all planetary components.

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