Komatsu PC200-6 PC200-7 Travel Gearbox 1st Planetary Carrier Spider With Sun

This primary-stage planetary carrier and sun gear combination is the initial torque reduction core fitted on the input side of travel final drive, designed exclusively for Komatsu PC200-6 and PC200-7 medium crawler excavators. These two classic models are widely deployed in municipal road construction, farmland consolidation, small quarry excavation and residential foundation works. Long hours of bumpy travel over rubble, repeated impact from rock collision and continuous variable torque during digging will inflict heavy fatigue stress on this key transmission component. Once the 1st planetary carrier suffers spider arm fracture, sun gear tooth spalling or inner spline severe wear, operators will face delayed walking response, inconsistent left-right track speed, constant piercing metal screeching and abnormal overheating inside the travel motor housing.

Every gear tooth curve, internal spline size and mounting hole position strictly complies with Komatsu’s original design drawings. The three alternative OEM part numbers 20Y-27-13150, 20Y-27-13140, 20Y-27-13130 support mutual replacement during travel gearbox overhaul. This assembly is a direct replacement piece without any on-site machining, which drastically cuts machine downtime for maintenance teams. This advantage is particularly prominent for overseas second-hand equipment merchants, as official Komatsu original parts often face long delivery cycles and stock shortages for these two older mainstream excavator models.

1. Three Interchangeable OEM Part Numbers, Customized for Komatsu PC200-6 & PC200-7 Final Drive Matching
   The three cross-reference part numbers 20Y-27-13150, 20Y-27-13140, 20Y-27-13130 can be freely substituted during travel reducer maintenance and reconstruction. This carrier-sun gear assembly is precisely shaped to fit the internal cavity of PC200-6/PC200-7 travel gearboxes and cannot be installed on other Komatsu excavator series. Strict 1:1 dimensional repliion maintains reasonable gear meshing clearance, effectively avoiding track offset, unstable shaking while walking, harsh internal friction noise and premature abrasion of matched transmission accessories after installation.
2. Integral Thickened Forged Frame Improves Long-Term Durability Under Reciproing Construction Loads
   Most low-cost generic aftermarket planetary carriers are prone to spider arm cracks or sun gear tooth breakage under all-day continuous construction impact loads. Our one-piece thickened forging technology combined with complete multi-stage constant temperature heat treatment greatly enhances the product’s impact resistance and anti-fatigue performance. It can maintain stable torque transmission during uninterrupted excavation work and frequent cross-region equipment transfer for rental and second-hand excavator fleets.
3. Two Independent Pre-Delivery Quality Inspections Eliminate Hidden On-Site Failure Risks
   Each finished assembly passes two separate closed-loop inspection flows before leaving the factory. Full-range dimension calibration accurately checks all matching tolerances of gear surfaces and internal splines. Simulated small quarry alternating torque aging test reproduces extreme actual construction load conditions to verify long-term transmission stability. All unqualified semi-finished products are eliminated internally, helping repair shops and equipment owners avoid economic losses caused by unplanned construction shutdowns.
4. Cost-Effective Maintenance Solution for Medium Excavator Fleet Owners & Local Repair Garages
   Genuine Komatsu original planetary drive spare parts have high procurement costs and unstable supply cycles for these two widely circulated aging medium excavator models. This aftermarket assembly achieves load-bearing performance and service life equivalent to OEM standards at factory direct wholesale prices, effectively reducing regular maintenance budgets for enterprises owning multiple PC200-6 and PC200-7 excavator assets.
5. Abundant Global Logistics Channels for International Construction Machinery Spare Parts Wholesalers
   All spot stock goods can be arranged for shipment within 3 working days after payment confirmation. Air freight service supports urgent emergency repair orders from remote mountain and rural construction sites. Consolidated bulk sea freight and full-container shipping provide economical bulk procurement plans for distributors covering Africa, Southeast Asia, Middle East, Central Asia and Latin American markets.

Our production plant has over 10 years of exclusive R&D and mass production experience focusing on medium excavator final drive planetary transmission components. Travel gearbox planetary carrier assemblies belong to our core flagship product lineup. Our closed-loop production process covers alloy steel die forging, 4-axis precision gear cutting, constant-temperature professional heat treatment and finished product heavy-load simulation testing. Custom alternating torque test benches simulate harsh small quarry and municipal infrastructure construction environments to continuously optimize product shock resistance and extend service life. Our planetary transmission spare parts are exported to more than 40 countries worldwide, establishing long-term stable strategic cooperative partnerships with construction machinery spare parts dealers all over the world.