Hitachi EX200-2 Travel Gearbox 2nd Planetary Carrier Spider With Sun Gear Assy for 1013979 3047446 3047442

This integrated second‑stage planetary spider and sun gear assembly sits in the middle transmission section of travel reduction final drive, exclusively designed for the classic Hitachi EX200‑2 medium crawler excavator. Continuous trenching, bulk earthworks and frequent cross‑site transfer over muddy, stony terrain subject this core transmission component to sustained torque fluctuations and repeated impact shocks. Once the 2nd‑stage planetary unit suffers spider fracture, sun gear tooth breakage or internal spline abrasion, operators will encounter insufficient travel traction, uneven track movement, persistent metal rattling noise and abnormal overheating of the entire final drive housing.

All gear tooth profiles, internal spline dimensions and mounting hole layouts strictly replie original Hitachi official engineering drawings. The three cross‑reference part numbers 1013979, 3047446 and 3047442 are fully interchangeable during gearbox overhaul. Direct drop‑in field installation can be completed without extra cutting or drilling machining. It effectively shortens equipment downtime for maintenance crews, especially when genuine OEM spare parts face long supply lead times for this vintage excavator model widely circulated across global second‑hand machinery markets.

1. Triple‑PN Interchangeable Assembly Custom‑Matched for Hitachi EX200‑2 Final Drive System

   Part numbers 1013979, 3047446 and 3047442 can mutually substitute each other during travel reducer rebuilding projects. This carrier‑sun gear assembly is precisely tailored to match the inner structural layout of EX200‑2 travel reducer and cannot fit other Hitachi excavator series. Strict dimensional repliion maintains ideal gear meshing clearance, preventing track offset deviation, jerky track travelling, harsh internal grinding noise and accelerated component wear after field installation.

2. One‑piece Forged Construction Reinforces Structural Durability Under Cyclic Working Loads

   Most low‑cost aftermarket planetary carriers easily develop spider cracks or sun gear tooth chipping under long‑term repeated shock loads on construction sites. Our integral one‑body forging craft paired with complete multi‑step thermal‑treatment workflow greatly upgrades anti‑impact and anti‑fatigue performance. It delivers stable consistent running performance during non‑stop digging cycles and frequent cross‑site equipment reloion for second‑hand equipment fleets.

3. Two‑phase Pre‑delivery Quality Verifiion Eliminates Hidden On‑Site Failure Hazards

   Each finished assembly undergoes two independent inspection workflows before factory delivery. Comprehensive dimension calibration verifies all mating tolerances of gears and internal splines. Simulated real‑site heavy‑load testing reproduces actual construction working stress to validate transmission stability. All potentially defective units are filtered out internally, helping repair workshops and equipment owners avoid unplanned machine stand‑still losses.

4. Budget‑friendly Overhaul Alternative for Second‑hand Equipment Fleets & Local Repair Garages

   Genuine Hitachi planetary drive spare parts come with high purchase costs and unstable supply cycles for this aged legacy excavator model. This aftermarket assembly achieves load‑bearing performance and service lifespan comparable to OEM standards at factory‑direct price levels, cutting recurring maintenance expenditure for enterprises managing multiple second‑hand EX200‑2 excavator assets.

5. Flexible Multimodal Shipping Solutions for Global Machinery Spare‑part Distributors

   Stock‑available goods can be dispatched within 3 working days once payment confirmation is completed. Air freight service supports urgent breakdown orders for remote construction zones. Consolidated sea cargo and full‑container shipping deliver cost‑efficient bulk purchasing options for distributors covering Africa, Southeast Asia, Middle East and Latin America markets.

Our production facility possesses over 10 years of accumulated R&D and mass‑production experience focused on excavator final‑drive planetary components. Travel gearbox planetary assemblies belong to our flagship core product lines. Our closed‑loop production workflow covers alloy steel forging, high‑precision gear cutting, professional thermal treatment and finished‑product load‑simulation evaluation. Dedied heavy‑load test benches replie harsh quarry and construction‑site operating environments to continuously boost component anti‑shock performance and long‑term service lifespan. Our planetary spare parts are exported to dozens of countries, building stable long‑term cooperative partnerships with heavy‑machinery spare‑part dealers worldwide.