Hitachi ZX240-3 Travel Gearbox 3rd Planetary Carrier Spider With Sun Gear Assy

This third-stage planetary spider and matched sun gear assembly acts as the final reduction component installed inside the travel final drive for Hitachi ZX240-3 crawler excavators. It is widely deployed in road reconstruction, quarry material transportation, river dredging and large-scale foundation earthworks, meeting regular overhaul requirements for equipment leasing companies, field maintenance workshops and international spare parts wholesalers across Africa, Southeast Asia and the Middle East.

Mounted in the last reduction section of multi-stage travel gearbox, this planetary assembly bears the largest output torque before power transfers to the track sprocket. It continuously withstands heavy impact loads during steep slope climbing, frequent steering and full-load travelling. Typical failure modes include carrier lug cracking, sun gear tooth chipping, spline wear and internal gear surface pitting. Once damaged, the excavator will show obvious symptoms such as weak traction during climbing, uneven track travelling speed, continuous abnormal metal friction noise and excessive temperature rise of the travel reducer. Unexpected machine shutdown will delay the whole construction schedule and generate extra emergency repair costs for contractors and equipment owners.

Our assembly is produced in line with OEM equivalent standards for gear tooth profile, spline fit clearance and overall mounting dimensions. No secondary cutting, drilling or modification work is required during travel gearbox overhaul, supporting direct replacement installation and effectively cutting machine downtime. As a reliable aftermarket substitute for expensive original spare parts with unstable supply cycles, this assembly delivers stable torque transmission with factory direct wholesale pricing, ideal for bulk procurement by cross-border construction machinery component suppliers.

1. Precise dimensional replication, dedicated for Hitachi ZX240-3 travel reducer, non-interchangeable with other excavator models This planetary assembly is customized according to the internal cavity size of ZX240-3 travel gearbox and cannot be assembled onto other machine models. Accurate control over spline tolerance and gear meshing gap prevents transmission jitter, track deviation and accelerated wear of matched transmission components after installation, and no extra auxiliary fittings are needed during assembly.
2. One-piece integral forging structure, excellent impact resistance for frequent heavy-load construction tasks Many low-cost generic planetary carriers easily suffer lug fracture and gear tooth collapse under frequent start-stop impact loads. Our integral forging process together with standardized heat treatment improves overall structural toughness and extends service life. It maintains stable power output during repeated moving and digging cycles, helping rental fleets reduce the overall overhaul frequency of travel gearboxes.
3. Strict whole-process factory quality control to lower risks of unplanned machine halt Every finished assembly passes full dimension inspection and load simulation testing before shipment. Defective semi-finished products are screened out in advance, avoiding rework troubles for maintenance teams and economic losses caused by sudden equipment stoppage on construction sites.
4. Cost-effective aftermarket option to manage routine equipment maintenance budgets Genuine original planetary spare parts usually come with high prices and long lead times. Our aftermarket assembly achieves comparable load capacity and service lifespan as OEM components at factory direct price, cutting annual maintenance expenditure for enterprises operating multiple excavators.
5. Multiple global logistics choices for bulk wholesale buyers In-stock goods can be arranged for delivery within 3 working days after payment confirmation. Air freight meets the demand of urgent emergency repair orders; consolidated sea freight and full-container shipment provide economical bulk purchasing solutions for long-term distributors.

Our manufacturing workshop specializes in the research and production of planetary gear spare parts for travel gearboxes of various excavator brands. We have a complete production chain covering alloy steel die forging, precision gear machining, professional heat treatment and finished product performance testing. The independent torque simulation test bench replicates harsh real-site working conditions to continuously improve product wear resistance and impact tolerance. Our planetary gear assemblies are exported to many overseas regions and maintain long-term stable cooperative relations with global construction machinery spare parts wholesalers.

Q1: Can this third-stage planetary carrier assembly fit excavator models other than Hitachi ZX240-3? A1: Cross-model installation is not supported. Different excavator models adopt final drive assemblies with different structural sizes and spline specifications. Please confirm your machine model and corresponding part numbers before placing orders.

Q2: Which travel gearbox failures can this assembly fix? A2: It solves malfunctions caused by cracked carrier lugs, broken or worn sun gear teeth, inconsistent track travelling speed, internal metal grinding noise and insufficient traction while climbing slopes.

Q3: Do you offer tiered discounts for large wholesale orders? A3: Yes, differentiated preferential prices are provided according to purchase volume. We can also arrange full-container sea transport to reduce comprehensive logistics costs.

Q4: What packaging is used for long-distance ocean transportation? A4: Heavy-duty anti-rust grease is evenly coated on all metal surfaces. The whole assembly is wrapped with waterproof and shockproof PE film, then sealed inside reinforced export plywood cases to prevent collision deformation and moisture corrosion during long overseas transit.