KOMATSU PC58U EXCAVATORS FINAL DRIVE ASSEMBLY 20U-60-42111 FINAL DRIVE MOTOR

The Travel Motor / Final Drive (Part No. 20U-60-42111) for the Komatsu PC58U mini excavator is a compact, high-torque propulsion unit engineered for tight-radius construction, utility, and landscaping applications in the 5.5-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 in confined urban and residential work environments. It is designed as a direct OEM replacement, ensuring exact fitment and factory-specified hydraulic performance for the PC58U model.

• North America & Europe: Designed for municipal utility work, residential landscaping, and indoor renovation projects in dense urban areas, featuring enhanced cold-weather sealing for reliable operation during winter months and low-noise characteristics suitable for residential and commercial zones.
• 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.

• Compact Urban-Optimized Design: The integrated motor and gearbox assembly is dimensionally engineered to fit within the narrow undercarriage of the PC58U without compromising drawbar pull or tractive performance on confined job sites.
• 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.
• Precision OEM Replacement Fit: All mounting bolt patterns, pilot diameters, spline connections, and hydraulic port locations match original Komatsu specifications for the PC58U model, enabling seamless installation with minimal machine downtime.
• 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. Examine drained oil for metallic particles as an early diagnostic indicator of gear or bearing wear.
• 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.

Manufacturing Facility Exterior

Factory Production Line

Trade Show Exhibition

Professional Team

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.

Secure Product Packaging Example

• 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