Komatsu PC220-5 PC220-6 PC220-7 Final Drive TM35VL Travel Motor Assembly Medium Excavator Hydraulic Propulsion Component High Torque Planetary Gearbox Precision-Engineered Reduction Gear System

The Final Drive (TM35VL) for Komatsu PC220-5, PC220-6, and PC220-7 excavators is a heavy-duty travel propulsion assembly engineered for medium-to-large-scale earthmoving, quarry operations, and infrastructure development in the 22-ton machine class. This unit integrates a high-torque axial piston hydraulic motor with a rugged multi-stage planetary reduction gearbox, delivering consistent tractive effort and reliable travel performance under sustained heavy-load conditions.

The Komatsu PC220-5, PC220-6, and PC220-7 excavators are deployed across diverse global job sites. Our final drive unit is regionally optimized to meet specific operational challenges:

• North America & Europe: Engineered for heavy civil construction, road building, and quarry applications, with reinforced housing and enhanced sealing to withstand high-frequency use, cold-weather startups, and abrasive winter road treatments.
• Southeast Asia & Oceania: Equipped with heavy-duty floating seals that resist ingress of abrasive laterite soils, clay, and tropical mud common in mining, plantation, and large-scale earthworks projects.
• Middle East & Africa: High-temperature seals and corrosion-resistant materials protect against sand erosion, thermal cycling, and airborne dust in arid desert and semi-arid environments.

• High-Torque Axial Piston Motor: The swashplate-type motor design delivers strong starting torque and smooth speed control, enabling efficient tracking on steep slopes, soft ground, and uneven quarry terrain.
• Multi-Stage Planetary Reduction: The TM35VL gearbox employs heat-treated alloy steel planetary gears manufactured to tight tolerances, ensuring even load distribution across multiple contact points and extended service life between major overhauls.
• Cross-Generation Compatibility: Engineered to fit PC220-5, PC220-6, and PC220-7 models with identical mounting dimensions, pilot bores, spline connections, and hydraulic port locations, providing flexibility for fleet maintenance across multiple machine generations.
• Robust Structural Integrity: The cast iron housing features reinforced ribbing and stress-relieved construction to resist structural fatigue under continuous shock loading, while dual-cone floating seals protect internal components from contamination.

• Hydraulic System Care: Routinely inspect case drain lines for restrictions, kinks, or blockages. A restricted drain line can generate excessive back pressure, leading to motor rotary group failure or seal damage. Always use 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 quarry work, demolition, or continuous heavy digging.
• Mounting Bolt Protocol: When reinstalling the final drive unit, 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.
• 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.

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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• 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