Deere ZAX120 Travel Gearbox 1st Planetary Carrier Spider With Sun Gear Assy For Excavator Parts 2043774 2043769 3085568

This first-stage planetary spider and supporting sun gear assembly serves as the primary reduction unit inside the travel final drive for Deere ZAX120 crawler excavators. It is widely adopted in municipal pipeline construction, housing foundation excavation, site leveling and small-scale stone mining projects, satisfying the regular maintenance needs of equipment leasing firms, field repair shops and international spare parts distributors in Africa, Southeast Asia and the Middle East.

Installed at the initial reduction position of multi-stage travel gearbox, this planetary assembly directly accepts torque input from the travel motor, enduring recurring impact loads generated by frequent start-stop movement, short-distance site transfer and uphill operation. Common damage conditions include fatigue cracks on carrier support lugs, sun gear tooth pitting or breakage, as well as severe abrasion of internal connecting splines. Once damaged, the excavator will show typical symptoms such as delayed travel response, speed deviation between left and right tracks, continuous metallic grinding noise inside the reducer and abnormal overheating of travel gearbox. Sudden equipment shutdown will hold back construction progress and raise labor and spare part replacement costs for project contractors and equipment owners.

Our assembly is manufactured according to OEM equivalent standards on gear tooth profile, spline fitting clearance and overall mounting dimension. No secondary cutting, drilling or modification work is required during travel gearbox overhaul, enabling direct replacement installation and shortening machine downtime efficiently. As an affordable aftermarket alternative to high-priced genuine spare parts with unstable supply cycles, this product ensures stable torque transmission under factory wholesale pricing, suitable for bulk procurement of cross-border construction machinery suppliers.

1. Precise dimensional replication, dedicated for Deere ZAX120 travel reducer, non-interchangeable with other excavator models

   This planetary assembly is customized based on the internal cavity size of ZAX120 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 short-cycle 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.