208-27-00311 208-27-00312 Final Drive for KOMATSU PC400-7 PC400-8 PC450-7 PC450-8 LC Excavator Travel Track Motor with Reducer

• Part Name: Full Final Drive Assembly (Hydraulic Travel Motor + Planetary Reducer Integrated Track Drive Device)
• OEM Side Identification:
  208-27-00311 = Left Hand Final Drive 208-27-00312 = Right Hand Final Drive
• Cross Interchange Part Numbers:
  208-27-00240, 208-27-00241, 208-27-00242, 208-27-00243 Matching internal travel motor head: 706-8J-01012, 706-8J-01030, 706-8J-01411, 706-8J-01421
• Compatible Excavator Models (Standard & LC Long Carriage Version)
  Komatsu PC400-7, PC400LC-7 Komatsu PC400-8, PC400LC-8 Komatsu PC450-7, PC450LC-7 Komatsu PC450-8, PC450LC-8 Also applicable for -7EO / -8EO emission variant machines
• Available Quality Options:
  ✅ Genuine Original Factory New ✅ Professionally Fully Rebuilt (All wear components replaced + bench calibrated) ✅ High Precision Premium Aftermarket New
• Warranty Policy: 12 months for Genuine & Rebuilt units; 6–12 months for aftermarket assemblies
• Approximate Net Weight: 1750 kg
• Stock Status: In stock, shipped out within 3–7 working days after order confirmation

• Strictly manufactured per Komatsu OEM blueprint, perfectly matched hydraulic system configuration for PC400 / PC450 Dash-7 & Dash-8 series excavators, compatible with standard chassis, LC long carriage and E0 emission configurations
• Built-in two-speed shift valve: high-speed mode for site relocation, low-speed high-torque mode for climbing slopes, muddy terrain and heavy mining excavation operations
• Integrated spring-applied hydraulic-release multi-disc parking brake + built-in counterbalance valve, prevents track slipping on inclines and eliminates hydraulic impact during forward/reverse direction switching
• Double planetary reduction gear structure delivers large output torque, strong overload resistance and stable performance for long-cycle mining, quarrying and bulk earthmoving harsh working conditions
• Direct bolt-on replacement design, identical mounting hole layout, oil port positions and sprocket hub spline interface; no cutting, welding or machining modification required during field repair installation
• Forged alloy steel planetary gears with quenching & tempering heat treatment for superior wear resistance; thick cast iron housing fitted with heavy-duty floating seal assembly to effectively block mud, water and dust intrusion
• Every finished assembly undergoes full hydraulic pressure testing, internal leakage inspection, brake function verification, two-speed shift test and running-in endurance check before delivery; ISO9001 & CE certified

• Assembly Type: Complete Final Drive (Travel Motor + Two-Stage Planetary Reducer Integrated Unit)
• Motor Type: Variable Displacement Axial Piston Travel Motor
• Max System Relief Pressure: 37.3 MPa (373 bar)
• Travel Mode: Switchable high/low two-speed travel
• Brake Structure: Spring-applied static parking brake, hydraulic release
• Reduction Form: Two-stage planetary gear reduction
• Side Note: 208-27-00311 (Left), 208-27-00312 (Right), cannot be reversely installed left-right
• Output Interface: OEM standard spline matched to sprocket hub

PC400-7, PC400LC-7, PC400-8, PC400LC-8, PC450-7, PC450LC-7, PC450-8, PC450LC-8

208-27-00311, 208-27-00312, 208-27-00240, 208-27-00241, 208-27-00242, 208-27-00243

706-8J-01012, 706-8J-01030, 706-8J-01411, 706-8J-01421

PC400-7EO, PC400LC-7EO, PC400-8EO, PC400LC-8EO, PC450-7EO, PC450LC-7EO, PC450-8EO, PC450LC-8EO

• Over 13 years specialized in final drives and travel motors for 40–50 ton Komatsu heavy mining excavators
• Three quality grades available to meet different budget and severe construction site working environment demands
• Strict incoming & outgoing QC inspection system to guarantee long-term stable service life
• Sufficient inventory stored in Guangzhou warehouse, flexible sea freight & air freight global shipping solutions
• Professional engineering team provides on-site installation guidance, fault troubleshooting and long-term technical after-sales support
• Integrated one-piece assembly for direct replacement, effectively shortening machine downtime and maintenance cycle

A: No. 208-27-00311 is dedicated left final drive, 208-27-00312 is dedicated right final drive. Internal oil circuit layout differs, reversed installation will lead to weak traction, abnormal speed or walking failure.

A: Yes. If the planetary reduction gearbox is intact without gear damage or oil leakage, you can replace only the faulty motor head (706-8J series part numbers) to cut maintenance costs.

A: Rebuilt final drive replaces all worn internal consumable parts (piston, valve plate, planetary gears, friction plates, oil seals), fully bench tested to OEM performance standard with cost advantages. Genuine New is original factory brand-new assembly fully compliant with Komatsu factory drawings and specifications.

A: Goods are in ready stock, dispatched within 3–7 working days after order confirmation, worldwide sea and air shipping options available.