SANY SY335 Travel Gearbox 3rd Planetary Carrier Spider With Sun Gear Assy for Excavator Parts

This combined assembly of tertiary planetary carrier spider and matched sun gear functions as the final deceleration core inside the travel final drive of SANY SY335 crawler excavators. It is widely applied in large-scale earthmoving projects, quarry exploitation, road base construction and waterway regulation for overseas markets including Southeast Asia, Africa and the Middle East.

Installed on the last reduction stage of multi-stage travel gearbox, this planetary assembly bears the largest output torque during equipment operation. It endures frequent alternating impact loads in slope climbing, full-load excavation and repeated start-stop travelling. Once the carrier lugs develop fatigue cracks, sun gear teeth suffer spalling and breakage, or internal splines wear excessively, typical equipment faults will occur: delayed travelling response, inconsistent speed between left and right tracks, persistent metal friction noise and overheating of the travel gearbox. These malfunctions interrupt construction schedules and bring extra maintenance expenditure for engineering contractors, equipment leasing companies and professional repair teams.

Our assembly is manufactured strictly in accordance with SANY OEM technical specifiions for gear tooth profile, spline fit tolerance and mounting hole layout. No cutting, drilling or reaming modifiion is required during travel reducer overhaul, supporting direct plug-and-play installation and shortening machine downtime effectively. As an affordable aftermarket alternative to high-priced genuine SANY spare parts with unstable supply cycles, this product maintains stable torque transmission performance at factory wholesale prices, satisfying purchasing demands of repair workshops, spare parts distributors and cross-border construction machinery suppliers.

1. 1:1 OEM dimensional dupliion, exclusive fit for SANY SY335 travel reducer, non-interchangeable with other excavator models

   This planetary assembly is customized based on the internal cavity size of SY335 travel gearbox and cannot be assembled on other SANY models such as SY285 or SY305. Accurate reproduction of original spline tolerance and gear meshing clearance avoids transmission jitter, track deviation and premature abrasion of matched transmission parts after installation, with no extra auxiliary fittings needed during assembly.

2. Integral one-piece forging process, superior shock resistance and extended service life for long-hour heavy-duty operation

   Many low-cost universal aftermarket planetary carriers easily crack on support lugs and suffer gear tooth collapse under round-the-clock heavy digging loads. Our thick integral forging combined with full constant-temperature heat treatment greatly improves impact resistance and fatigue life. It ensures stable torque output during continuous excavation and short-distance site transfer, lowering overhaul frequency of travel gearboxes for rental fleets and used excavator operators.

3. Double closed-loop factory inspection to reduce economic losses caused by unexpected machine shutdown

   Each finished assembly passes two independent strict inspection workflows before delivery. Full-size dimension calibration checks all matching tolerances of gear surfaces and inner splines; simulated heavy-load torque aging test replies real construction working loads to verify long-term transmission stability. Defective semi-finished products are screened out in advance, helping repair shops and contractors reduce risks of sudden equipment halt.

4. Cost-effective aftermarket substitute for genuine SANY spare parts to control long-term maintenance budget

   Original SANY planetary transmission spare parts feature high purchase cost and unstable stock for SY335, a mainstream medium-large excavator popular in global construction markets. Our aftermarket assembly reaches equivalent load capacity and service life as OEM components at factory direct price, cutting annual maintenance costs for enterprises managing multiple SANY excavators.

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

   In-stock goods can be shipped within 3 working days after payment confirmation. Air freight serves urgent emergency repair orders from remote mining and mountain construction sites; consolidated bulk sea freight and full-container shipments provide economical bulk purchasing plans for distributors covering Southeast Asia, Africa, the Middle East and Central Asia.

Our manufacturing base owns more than 15 years of specialized R&D and mass production experience for Chinese brand excavator travel motor planetary spare parts, taking SANY medium and large series planetary carrier assemblies as flagship products. We operate a complete closed production chain covering alloy steel die forging, 5-axis precision gear machining, constant-temperature professional heat treatment and finished heavy-load simulation testing. Self-developed impact torque test benches simulate harsh quarry and road working conditions to continuously improve impact resistance and extend product service cycles. Our planetary gear spare parts are exported to over 50 countries and regions worldwide, building long-term stable strategic partnerships with global heavy machinery spare parts wholesalers.