336D Travel Gearbox 1st Planetary Carrier Spider With Sun Gear Assy For

Cross OEM Part Numbers: 296-6230, 296-6231, 296-6232, 2966230, 2966231, 2966232

This matched first-stage planetary carrier and sun gear unit acts as the primary torque reduction core mounted at the input end of 336D travel final drive, exclusively developed for 336D heavy crawler excavators. This high-power excavator is prevalent in open pit mining, quarry crushing projects, large-scale land reclamation and mountain road excavation, enduring intense startup torque, long-duration heavy digging loads and frequent collision with rock rubble every day.

As the first deceleration component, this planetary set bears the initial impact torque when the travel motor starts rotating. Once the carrier’s support brackets fracture, sun gear tooth surfaces suffer spalling or internal splines experience excessive wear, the excavator will respond sluggishly while moving, generate a noticeable speed gap between left and right tracks, emit persistent shrill metal friction noise, and trigger abnormal high temperature of the travel motor, which will suspend all construction progress.

Our product strictly complies with original design standards on gear tooth curve, spline fit tolerance and mounting hole positioning. All six part numbers (hyphenated and non-hyphenated versions) are fully interchangeable during gearbox overhaul. The assembly supports direct on-site installation without extra cutting, drilling or reaming work, greatly cutting down labor time for equipment maintenance. It serves as a cost-effective substitute for expensive genuine spare parts, ideal for mine fleets, equipment rental firms and spare parts distributors operating in Africa, Southeast Asia and Central Asia.

1. Six universal OEM part numbers, fully matched with original 336D travel reducer dimensions

   All listed hyphenated and unhyphenated part codes can mutually replace each other during maintenance, no need to distinguish different production batches of original spare parts. This planetary assembly is customized to fit the internal cavity of 336D travel gearbox, and cannot be assembled on other models such as 330D or 336E. Accurate reproduction of original spline fit clearance and gear meshing gap prevents track deflection, unstable jitter during travel, abnormal internal grinding noise and premature abrasion of matched transmission components after installation.

2. Integrated thick one-piece forging molding, superior durability under harsh mining working conditions

   Cheap generic aftermarket planetary carriers often crack support ribs or collapse gear teeth under round-the-clock continuous heavy mining loads. Our integral thick die forging technology plus full-process constant-temperature heat treatment drastically improves impact resistance and fatigue resistance. It maintains stable torque transmission during non-stop heavy excavation and long-distance cross-site transfer, lowering the overhaul frequency of travel gearboxes for equipment rental fleets and used excavator owners.

3. Two independent pre-delivery inspection procedures to avoid economic losses from unexpected machine shutdowns

   Every finished assembly undergoes two separate closed-loop inspection workflows before leaving the factory. Full-range dimension calibration verifies all matching tolerances of gear surfaces and inner splines; simulated open-pit heavy torque aging test replies extreme harsh working loads to validate long-term transmission stability. All unqualified semi-finished products are eliminated in advance, helping repair workshops and mine operators reduce loss risks brought by unplanned equipment downtime.

4. Economical OEM-level replacement solution for large excavator fleet managers

   Genuine original planetary spare parts come with high purchase costs and lengthy supply cycles for the widely circulated 336D model. Our aftermarket assembly delivers identical load-bearing capacity and service lifespan as OEM products at factory-direct wholesale prices, effectively cutting the annual maintenance budget for enterprises equipped with multiple 336D heavy machines.

5. Diversified global logistics schemes for international construction machinery spare parts wholesalers

   All in-stock products can be arranged for shipment within 3 working days after payment confirmation. Air freight channels handle urgent emergency repair orders from remote mountain mining zones; consolidated bulk sea freight and full-container shipments provide cost-saving bulk purchasing plans for distributors covering Africa, Southeast Asia, the Middle East, Central Asia and Latin America.

Our production plant boasts over 13 years of dedied R&D and mass production experience in excavator travel motor planetary transmission spare parts, with planetary carrier assemblies as our core flagship product series. We operate a complete closed-loop production chain covering alloy steel die forging, 5-axis precision gear machining, constant-temperature professional heat treatment and finished product heavy-load simulation testing. Self-developed heavy-torque test benches simulate severe mine and highway construction working conditions to continuously optimize product shock resistance and extend service cycles. Our planetary gear spare parts are exported to more than 48 countries and regions worldwide, building long-term stable strategic partnerships with global heavy machinery spare parts wholesalers.

Q1: Can this first-stage planetary carrier assembly fit other excavator models besides 336D?

A1: Cross-model compatibility is not available. Different excavator series adopt final drive assemblies with exclusive non-interchangeable structural dimensions and spline parameters. Please double-check your exact machine model and OEM part number before submitting orders.

Q2: What travel gearbox malfunctions can this assembly fix?

A2: It addresses equipment failures induced by cracked carrier support ribs, severely worn or broken sun gear teeth, offset wobbling tracks, continuous harsh internal gear grinding noise and insufficient travel driving power output.

Q3: Do you offer tiered volume discounts for large bulk wholesale orders?

A3: Yes, we provide differentiated preferential prices based on order volume. We can coordinate full-container sea transportation to reduce overall international logistics expenditure for large-batch procurement.

Q4: What anti-rust and shockproof packaging is adopted for long-distance ocean transportation?

A4: All metal surfaces are evenly coated with high-viscosity heavy-duty anti-rust grease. The whole assembly is wrapped with multi-layer thick waterproof and shockproof PE film, then sealed inside reinforced export plywood crates to avoid surface scratches, collision deformation and damp corrosion during prolonged overseas sea transit.