Komatsu PC360-7 PC300 PC350 PC360 Travel Gearbox 1st Planetary Carrier Spider

This matched first-stage planetary carrier and sun gear set acts as the primary input deceleration component inside travel motor final drive, exclusively engineered for Komatsu heavy-duty excavators PC300, PC350, PC360 and PC360-7. Heavy rock excavation, large-volume earth backfilling, mountain site operation and frequent cross-terrain transfers expose this core transmission unit to extreme peak torque and continuous collision impact. Damages including carrier spider crack, sun gear tooth breakage and spline abrasion on the 1st planetary assembly will directly trigger slow travel response, uneven track traction, persistent harsh metal friction sound and severe overheating of the entire travel drive housing.

All gear tooth outlines, inner spline dimensional parameters and mounting hole positions strictly follow Komatsu original factory blueprint standards. The three cross-reference OEM part numbers 207-27-72160, 207-27-72120, 207-27-72110 are fully interchangeable during travel gearbox overhaul. The assembly features direct plug-and-play installation without secondary drilling, reaming or cutting on site, greatly shortening machine downtime for maintenance teams. This advantage is highly valuable for overseas mining and construction fleets where authentic Komatsu OEM parts face long supply lead times and stock shortages for this popular heavy excavator series.

1. Three Universal Cross PN Design, Fully Customized for Komatsu PC300/350/360/360-7 Final Drive System

   The three part numbers 207-27-72160, 207-27-72120, 207-27-72110 can be freely replaced with one another during travel reducer repair and rebuild. This carrier-sun gear combination is strictly molded to match the internal cavity structure of PC300/350/360 series travel gearboxes and cannot be assembled on other Komatsu excavator models. 1:1 original dimensional repliion maintains optimal gear meshing clearance, completely avoiding track deflection, unstable walking jitter, sharp internal grinding noise and accelerated wear of matching parts after installation.

2. Reinforced Integral Forged Body Greatly Extend Service Life Under Long-Term Heavy Mining Loads

   Most low-cost generic aftermarket planetary carriers easily suffer spider fracture or sun gear tooth collapse under long-hour continuous heavy mining impact loads. Our one-piece integral forging technology plus complete multi-stage heat treatment process significantly lifts the product’s impact resistance and fatigue resistance. It delivers stable and consistent transmission performance during round-the-clock excavation operations and frequent long-distance site transfer for heavy equipment rental and second-hand fleets.

3. Two-Tier Pre-Shipment Quality Screening Block All Potential Field Breakdown Risks

   Each finished assembly undergoes two independent closed-loop inspection procedures before leaving the factory. Full-range dimension calibration accurately verifies all matching tolerances of gear surfaces and inner splines. Simulated mine heavy-torque aging test reproduces extreme real working load to verify long-term transmission stability. All unqualified semi-finished products are eliminated internally, helping repair service shops and mine operators avoid costly unplanned production shutdown losses.

4. High Cost-Performance Maintenance Solution for Heavy Excavator Fleet Owners & Global Service Garages

   Genuine original Komatsu planetary drive spare parts carry extremely high purchase costs and unstable supply cycles for this mainstream heavy excavator series. This aftermarket assembly delivers load-bearing capacity and service life reaching OEM equivalent standards at factory direct wholesale prices, effectively lowering recurring maintenance budgets for enterprises managing multiple PC300/350/360 heavy excavator assets.

5. Diversified Global Logistics Channels for International Heavy Machinery Spare Parts Wholesalers

   All in-stock items can be arranged for shipment within 3 working days once payment is confirmed. Express air freight service handles urgent emergency breakdown orders from remote mountain mining areas. Consolidated bulk sea cargo and full-container shipping provide ultra-cost-saving bulk procurement plans for distributors covering Africa, Southeast Asia, Middle East, Central Asia and Latin American markets.

Our manufacturing plant holds more than 10 years of specialized R&D and mass production experience focusing on heavy excavator final drive planetary components. Travel gearbox planetary carrier assemblies rank among our top flagship core product lines. Our fully closed-loop production workflow covers alloy steel die forging, 5-axis precision gear cutting, constant-temperature professional heat treatment and finished product heavy-load simulation evaluation. Custom heavy-torque test benches replie harsh open-pit mine and large infrastructure construction working environments to continuously optimize product shock resistance and extended service lifespan. Our planetary transmission spare parts are exported to over 40 countries worldwide, building long-term stable strategic cooperation relationships with heavy machinery spare parts wholesalers across the globe.