Travel Gearbox 1st Planetary Carrier Spider With Sun Gear Assy for Hitachi ZX450 EX400‑3‑5 Excavator 1015505 3053098 2044685

Product Brief

This 1st stage planetary carrier spider integrated with sun gear assembly is a core load‑bearing transmission component inside the travel reduction gearbox for Hitachi ZX450, EX400‑3, EX400‑5 heavy‑duty excavators. It performs torque amplification and speed reduction for the travel motor output, delivering powerful tractive force for climbing, pivoting and cross‑terrain traveling under heavy‑load working conditions. Widely applied in large‑scale earth‑moving, quarry mining and infrastructure construction sites, this replacement assembly is heavily sourced by overseas repair centers, rental fleet operators and cross‑border spare‑part wholesalers for final‑drive overhaul and worn‑part direct replacement of Hitachi large excavators.
Enduring persistent heavy torque, frequent impact load and gear‑oil contamination in harsh field environments, the original planetary carrier assembly will suffer gear tooth pitting, spline abrasion, carrier plate deformation and sun‑gear tooth breakage over long‑term operation. Typical failure symptoms include weak traveling traction, track deviation, abnormal clattering noise inside final drive, overheating of travel gearbox housing and jitter during machine movement. Severe damage will lock up the travel system entirely, forcing the excavator out of service and bringing about high onsite repair costs and project delays.
Our aftermarket planetary carrier & sun gear assembly strictly follows original component standards on carrier structure, gear tooth profile, spline parameters and mounting dimension. No welding, cutting or secondary modification is needed during onsite assembly, helping mechanics finish final‑drive repair efficiently and cut equipment downtime significantly. Compared with high‑priced original OEM units with long lead‑time, this assembly offers dependable transmission performance and meets bulk‑procurement demands for global suppliers specializing in Hitachi large excavator undercarriage and final‑drive spare parts.

Core Technical Indexes

Product Highlights

1. High‑precision gear‑tooth & spline matching for direct onsite fitting All gear tooth profiles, spline sizes and mounting hole positions keep consistent with original parts. Repair technicians can complete assembly replacement inside the travel gearbox without secondary machining, raising working efficiency for heavy‑duty final‑drive overhaul and used‑machine refurbishment projects.
2. Forged high‑torque‑resistant structure adapting large‑excavator severe working conditions Many low‑cost cast replacement parts easily produce tooth chipping and carrier distortion under heavy shock torque. Our carrier spider adopts alloy steel forging plus full tooth‑surface quenching process, improving impact resistance and anti‑fatigue performance, lowering replacement frequency for ZX450 / EX400‑3‑5 units working in quarry and high‑intensity earth‑moving sites.
3. Strict inspection procedure for every finished assembly before delivery Each planetary carrier assembly goes through tooth‑profile detection, spline tolerance checking and meshing noise testing before packing. Defective workpieces are eliminated in factory, reducing re‑work risk for repair teams and avoiding sudden travel‑system failure occurring on construction sites.
4. Cost‑competitive aftermarket solution for large‑size excavator fleet maintenance Genuine original planetary carrier assemblies for Hitachi ZX450 / EX400 series carry high purchase cost and unstable stock status. Our factory‑supplied replacement assembly balances reliable transmission performance and favorable cost, assisting equipment owners and service workshops to control overall maintenance expenditure for heavy‑excavator fleets.
5. Multiple shipping alternatives for bulk‑order merchants In‑stock items support quick shipment upon payment confirmation. Air freight can be arranged for urgent breakdown repair orders. Sea consolidation and full‑container transport options help overseas bulk importers reduce comprehensive logistics expenditure.

Factory Production Strength

Our production plant devotes to R&D and mass production of final‑drive transmission spare parts for large‑size Japanese excavators, covering multi‑stage planetary carrier assemblies, sun gears, planet gears and travel motor internal components. We possess complete production chains including alloy‑steel forging, precision gear hobbing, heat‑treatment and finished‑product tolerance inspection. Simulated heavy‑torque load tests are carried out to verify component durability under real quarry and earth‑moving working scenarios. Our spare parts are exported to many overseas regions and maintain long‑term stable cooperation relationships with global construction‑machinery spare‑part wholesalers.

Frequently Asked Customer Questions

Q1: Can this 1015505 3053098 2044685 planetary carrier assembly fit other Hitachi excavator models? A1: Cross‑model installation is not suggested. Different travel gearbox assemblies differ in gear modulus, spline specification and carrier dimension. Please double‑confirm machine model and your old part number before placing orders.
Q2: What travel‑drive failures can this planetary carrier & sun gear assembly fix? A2: It resolves faults caused by gear and carrier wear: insufficient travel power, track drifting, abnormal knocking noise inside final drive, travel gearbox overheating and intermittent track stalling.
Q3: Can I get volume‑based preferential price for bulk purchases? A3: Yes, tiered discount is offered according to order quantity. Full‑container sea freight arrangement is available to cut total logistics cost.
Q4: What export‑grade packaging is used for long‑distance overseas shipment? A4: Anti‑rust oil is sprayed onto all gear and spline surfaces. The whole assembly is wrapped by anti‑rust paper and shock‑absorbing PE foam, then secured inside heavy‑duty plywood case, preventing gear tooth collision damage and rust during long‑haul ocean transportation.