Hitachi ZX240-3 Travel Gearbox 1st Planetary Carrier Spider With Sun Gear Assy For Excavator Parts 1032485 3103051 2049585

This 1st‑stage planetary carrier spider and sun gear integrated assembly constitutes the core reduction transmission unit within the travel gearbox of Hitachi ZX240‑3 excavator. It undertakes torque transfer from the travel motor, realizes speed reduction and torque amplification to deliver powerful tractive force for slope climbing, cross‑ground travel and on‑site position adjustment. Widely applied in bulk earth‑moving, quarry processing and infrastructure foundation construction, this aftermarket replacement assembly is in steady demand among overseas maintenance workshops, equipment leasing firms and cross‑border spare‑part traders. It is commonly used for complete final drive disassembly overhaul and direct replacement of worn internal components for Hitachi ZX240‑3 equipment fleets.
During long‑term site operation, the planetary assembly bears continuous alternating heavy torque, repeated shock load, together with erosion from metal debris mixed in gear oil. Gradual failure modes include sun gear tooth pitting and spalling, spline surface wear, carrier spider deformation and pin‑hole ovalization. Typical field symptoms cover weak travel traction, track offset movement, stuttering when traveling under load, harsh metallic impact noise inside the travel reducer and abnormal temperature rise of the final drive housing. In extreme conditions, gear tooth fracture may occur, which locks the travel mechanism entirely, forcing machine downtime and bringing considerable on‑site repair expenses as well as project schedule delays for equipment operators.
Our replacement planetary carrier spider with sun gear assembly strictly adheres to original component standards for carrier structural dimension, gear tooth profile, spline tolerance and mounting hole distribution. No cutting, grinding or custom adapter modification is required during field assembly. On‑site mechanics can complete component swap efficiently, greatly shortening machine downtime. Compared with high‑cost genuine OEM assemblies with long order lead‑times, this aftermarket spare part delivers stable transmission performance and meets large‑volume repeat procurement needs for global distributors specializing in Hitachi medium‑large excavator final drive spare parts.

1. Strict dimension replication for rapid final‑drive on‑site service All gear tooth parameters, spline specifications and mounting positioning dimensions match original parts. Service technicians can finish internal replacement inside travel gearbox without secondary machining work, improving overhaul throughput for repair shops and used‑excavator refurbishment projects.
2. Forged heavy‑load construction adapted to complicated construction scenarios Numerous low‑cost cast replacement parts suffer carrier distortion and gear tooth chipping under frequent impact torque. Our carrier spider adopts one‑piece alloy steel forging combined with deep carburizing quenching treatment, optimizing anti‑impact and anti‑fatigue properties, effectively extending service cycle for ZX240‑3 units working in earth‑moving and quarry sites.
3. Comprehensive multi‑procedure inspection before product dispatch Each finished assembly undergoes gear tooth tolerance testing, spline dimension inspection and gear meshing noise evaluation before packing. Potential defective workpieces are filtered out in‑factory, lowering rework probability for service crews and preventing unexpected travel‑system breakdown on construction sites.
4. Practical aftermarket solution for medium‑large excavator fleet cost control Genuine OEM planetary carrier assemblies for Hitachi ZX240‑3 carry high purchase cost and volatile stock availability. Our factory‑direct replacement assembly balances reliable working performance and competitive price point, helping equipment owners and service workshops optimize overall maintenance budget for excavator fleets.
5. Customizable logistics options for bulk‑order buyers In‑stock items support quick shipment upon payment confirmation. Air freight service is available for urgent emergency breakdown orders. Sea consolidation and full‑container shipping solutions help overseas bulk purchasers cut comprehensive logistics expenditure.

Our manufacturing plant focuses on R&D and mass production of final‑drive transmission spare parts for Japanese medium‑large excavators, covering multi‑stage planetary carrier groups, sun gears, planet gears and related pin shaft accessories. We possess full‑set production workflows: alloy‑steel forging, precision gear processing, professional heat‑treatment and finished‑product performance testing. Simulated cyclic heavy‑torque tests are implemented to verify component durability under real‑world earth‑moving and infrastructure construction conditions. Our spare parts are exported to multiple overseas markets and maintain long‑term stable cooperation with global construction machinery spare‑part wholesalers.

Q1: Can this 1032485 3103051 2049585 planetary carrier assembly fit other Hitachi excavator models? A1: Cross‑model installation is not recommended. Different travel gearbox units vary in gear modulus, spline parameters and carrier overall dimension. Please double‑check machine model and original part number prior to placing orders.
Q2: Which travel drive failures can this planetary carrier & sun gear assembly remedy? A2: It solves equipment malfunctions originating from gear and carrier wear: insufficient travel power, track drifting, abnormal knocking noise inside final drive, travel gearbox overheating and intermittent track stalling.
Q3: Is volume‑based tiered discount accessible for large‑quantity purchases? A3: Yes, preferential pricing is determined according to order quantity. Full‑container sea freight arrangement can be supported to reduce total logistics cost.
Q4: What export‑grade packaging is used for long‑distance overseas delivery? A4: Anti‑rust oil is sprayed over all functional gear and spline surfaces. The whole assembly is wrapped with anti‑rust paper and shock‑absorbing PE foam, then fixed inside reinforced heavy‑duty plywood case, protecting gear teeth from collision damage and rust generation throughout long‑haul ocean transit.