Hitachi EX200-2 CX500 CX550 Travel Gearbox 3rd Planetary Carrier Spider With Sun

This integrated third‑stage planetary spider and sun gear assembly is the final torque‑output unit inside travel reduction final drive, built for the classic Hitachi EX200‑2 medium crawler excavator. Long‑term earth‑moving, trenching jobs and frequent site transfer over rough ground subject this transmission component to cyclic torque loads and recurring impact shocks. If the 3rd‑stage planetary unit sustains spider deformation, sun gear tooth breakage or internal spline wear, operators will face slow travelling speed, uneven track output, continuous metallic knocking noise and abnormal heat accumulation inside the final drive housing.

All gear tooth profiles, internal spline dimensions and mounting hole layouts strictly follow original Hitachi engineering drawings. Three cross‑reference part numbers 1013980, 3047444 and 3047443 are fully interchangeable during gearbox overhaul. Direct field replacement can be completed without secondary machining operations. It helps maintenance teams cut equipment downtime, especially when genuine OEM parts face long lead‑time shortages for this aged legacy excavator model widely circulating across global second‑hand equipment markets.

1. Triple‑PN Compatible Assembly Custom‑Tailored for Hitachi EX200‑2 Final Drive

   Part numbers 1013980, 3047444 and 3047443 can serve as mutual substitutes during overhaul work. This carrier‑sun gear assembly is purpose‑built to match the inner structural layout of EX200‑2 travel reducer and cannot fit other Hitachi excavator series. Strict dimensional repliion maintains proper gear meshing clearance, avoiding track offset movement, jerky travelling, harsh internal grinding noise and accelerated component wear post‑installation.

2. Integral Forged Structure Boosts Survivability Under Repetitive Cyclic Working Loads

   Many low‑cost aftermarket planetary carriers tend to suffer spider fractures or sun gear tooth chipping under repeated shock loads on construction sites. Our one‑body forging craft together with complete thermal‑treatment workflow greatly improves anti‑fatigue and anti‑shock capability. It delivers stable operating performance under long‑hour continuous digging and high‑frequency site reloion for second‑hand fleets.

3. Two‑Phase Pre‑Shipment Quality Audit Minimizes Unexpected On‑Site Breakdown Risks

   Each finished assembly undergoes two independent inspection workflows before factory release. Comprehensive dimension calibration verifies all mating tolerances for gears and splines. Simulated job‑site heavy‑load test reproduces real‑world working stress to validate transmission reliability. Potential defective components are screened out internally, helping repair workshops and equipment owners evade unplanned equipment stand‑still losses.

4. Cost‑Effective Overhaul Choice for Used‑Equipment Fleets & Local Repair Garages

   Genuine Hitachi planetary drive spare parts carry steep purchase costs and unstable supply cycles for this vintage excavator unit. This aftermarket assembly delivers load‑bearing performance and service life comparable to OEM standards at factory‑direct price levels, lowering recurring maintenance expenditure for enterprises operating multiple second‑hand EX200‑2 machines.

5. Diversified Multimodal Logistics Solutions for International Machinery Component Distributors

   Stock‑ready goods can be dispatched within 3 working days after payment confirmation. Air freight service ers to urgent breakdown orders from remote construction zones. Consolidated sea cargo and full‑container shipping options deliver cost‑saving bulk procurement solutions for distributors covering Africa, Southeast Asia, Middle East and Latin America markets.

Our facility owns over 10‑year accumulated expertise in R&D and mass‑production for excavator final‑drive planetary components. Travel gearbox planetary assemblies constitute our flagship product portfolio. Our closed‑loop production chain covers alloy steel forging, high‑precision gear processing, professional thermal treatment and finished‑product load‑simulation evaluation. Dedied heavy‑load test benches replie harsh construction‑site working conditions to continuously upgrade component anti‑shock property and long‑term service lifespan. Our planetary spare parts are exported across dozens of countries, establishing solid long‑term business partnerships with heavy‑machinery spare‑part dealers worldwide.