KOMATSU PC138 / PC138US EXCAVATORS FINAL DRIVE ASSEMBLY 22B-60-11323 FINAL DRIVE MOTOR HIGH QUALITY TRAVEL MOTOR CONSTRUCTION MACHINERY

The Travel Motor / Final Drive (Part No. 22B-60-11323) for Komatsu PC138 and PC138US excavators is a medium-duty travel propulsion unit engineered for general construction, earthmoving, and utility operations in the 13-ton machine class. This assembly integrates a high-efficiency axial piston hydraulic motor with a precision multi-stage planetary reduction gearbox, delivering reliable tractive effort and smooth travel performance across a wide range of job site conditions.

• North America & Europe: Designed for general construction, road building, and municipal utility projects, with enhanced cold-weather sealing for reliable operation during winter months and consistent performance in wet conditions.
• Southeast Asia & Oceania: Equipped with heavy-duty floating seals that resist ingress of abrasive mud, clay, and tropical soils common in drainage, foundation, and plantation projects in high-humidity environments.
• Middle East & Africa: Reinforced housing and high-temperature seals protect against sand abrasion and thermal stress in arid desert conditions, ensuring dependable performance on dusty construction sites.

• Balanced Power and Reliability: The axial piston motor delivers strong starting torque and smooth speed control, enabling efficient tracking on slopes, soft ground, and uneven terrain typical of medium-tonnage construction projects.
• Precision Multi-Stage Reduction: The planetary gear set employs heat-treated alloy steel components manufactured to tight tolerances, ensuring even load distribution across contact surfaces and extended service intervals between overhauls.
• Cross-Model Compatibility: Engineered to fit both PC138 and PC138US excavators with identical mounting dimensions, pilot bores, spline connections, and hydraulic port locations, providing flexibility for mixed fleet maintenance.
• Robust Contamination Defense: Dual-cone floating seals combined with heavy-duty dust wipers provide comprehensive protection against moisture, mud, and debris ingress, ensuring reliable operation in wet, dusty, and muddy working environments.

• Hydraulic System Care: Routinely inspect case drain lines for restrictions, kinks, or blockages. A restricted drain line can generate excessive back pressure, potentially causing motor seal failure or rotary group damage. Always maintain clean hydraulic fluid and replace return filters according to the machine's prescribed service schedule.
• Gear Oil Management: Fill the planetary housing with the recommended extreme-pressure gear oil of the correct viscosity grade. Change the oil every 250-500 operating hours under normal conditions, and every 250 hours in severe applications such as demolition, foundation work, or continuous heavy digging.
• Mounting Bolt Integrity: When reinstalling the travel motor assembly, always fit new high-strength bolts. Apply a suitable thread locking compound to the bolt threads prior to torquing to factory specifications, preventing loosening caused by continuous vibration and shock loads during travel and digging operations.
• Pre-Start 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 operational 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.

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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
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