Precision-Engineered 208-27-00281 208-27-00280 Final Drive for Komatsu PC400-7 | High-Efficiency Axial Piston Travel Motor

The Final Drive Assembly (Part Nos. 208-27-00281 and 208-27-00280) for the Komatsu PC400-7 excavator 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. It is designed as a direct OEM replacement, ensuring precise fitment and factory-specified hydraulic performance for the PC400-7 model.

The Komatsu PC400-7 excavator is deployed across demanding global job sites. Our final drive assembly is regionally optimized to meet specific operational challenges:

• 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 208-27-00281 and 208-27-00280 specifications, providing flexibility for fleet maintenance and ensuring correct fitment for left-hand and right-hand drive positions with identical mounting dimensions, pilot bores, spline connections, and hydraulic port locations.
• Mining-Grade Structural Integrity: The ductile iron housing features massive reinforced ribbing and stress-relieved construction to resist structural fatigue under continuous shock loading. Dual-cone floating seals with heavy-duty dust wipers provide robust protection against contamination in the harshest environments.

1. Hydraulic System Care: Routinely inspect case drain lines for restrictions, kinks, or blockages. A restricted drain line can generate excessive back pressure, leading to catastrophic motor rotary group failure. Maintain strict hydraulic fluid cleanliness standards and replace return filters at intervals prescribed for heavy mining equipment.
2. Gear Oil Management: Fill the planetary housing with the recommended extreme-pressure gear oil of the correct viscosity grade for heavy-duty applications. Change the oil every 250-500 operating hours under normal conditions, and every 250 hours in severe applications such as continuous mining, quarry production, or heavy ripping. Perform regular oil sampling and analysis to detect metallic particles as an early indicator of gear or bearing degradation.
3. Mounting Bolt Protocol: When reinstalling the final drive assembly, always fit new high-strength bolts meeting the specified grade. Apply a suitable thread locking compound to the bolt threads prior to torquing to factory specifications, preventing loosening caused by extreme vibration and shock loads during tramming and digging cycles.
4. Pre-Operation Priming Procedure: Before initial startup or after final drive replacement, fill the motor housing with clean hydraulic oil to purge trapped air pockets. Run the machine at low idle for several minutes, cycling the tracks forward and reverse, to ensure complete lubrication of all planetary components before engaging heavy production loads.

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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Our efficient execution and rigorous manufacturing approach ensure our products meet over 95% of original performance specifications. This commitment has built widespread trust in the industry.

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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