Hyundai R210 Swing Gearbox 2nd Planetary Carrier Spider With Sun Gear Assy For

This second‑stage planetary carrier spider integrated with second sun gear assembly acts as a vital deceleration component inside swing gearbox for Hyundai R210 excavator. Situated in the middle transmission link of the slew reducer, it receives power output from the first‑stage planetary set and further amplifies torque to drive upper structure rotation. Long‑time heavy‑load operation, frequent start-stop rotation and impact from site working condition will easily trigger gear surface pitting, spline abrasion and carrier deformation. Once these parts get worn out, excavator will generate typical failures including sluggish swing speed, rotational stutter, abnormal knocking noise and insufficient slewing torque. This aftermarket assembly follows original sample dimension standards, supporting direct replacement to restore normal rotary performance for construction equipment.

1. Optimized heat‑treatment performance: Adopts high‑quality alloy steel raw material. After carburizing and quenching processing, gear tooth surface reaches high hardness while the carrier spider maintains good overall toughness. It effectively withstands cyclic impact load generated during frequent slewing, lowers failure risks such as tooth chipping and carrier cracking under tough working environment.
2. Fine grinding for gear engagement surface: Sun gear and planetary matching surfaces are precisely ground. Stable gear meshing greatly reduces internal friction heat and metal wear debris. It prevents secondary damage to ring gear, planetary pinions and bearings inside swing gearbox, prolonging the whole reducer service cycle.
3. Strict piece‑by‑piece dimension inspection: Critical dimensions including gear tooth profile, spline tolerance, mounting hole position and assembly clearance are fully inspected before packing. High interchangeability with original housing helps maintenance technicians complete gearbox overhaul efficiently and shorten equipment downtime on construction site.
4. Cost‑saving maintenance solution: Compared with purchasing the complete brand‑new swing reducer assembly, replacing this planetary carrier and sun gear assembly can resolve most second‑stage transmission faults. It helps repair shops and end users cut down overall overhaul budget without sacrificing machine working performance.

We are specialized in producing excavator slew and travel gearbox planetary components. Each production batch will go through raw material composition inspection, hardness test and gear meshing simulation test. Finished products are coated with anti‑rust oil and packed with shock‑proof materials, protecting parts from rust and collision damage during long‑distance ocean shipment. We support bulk wholesale for overseas distributors, local repair workshops and trading companies, acceptable for trial bulk order.

Q1: What symptoms mean this 2nd planetary assembly needs replacement? A: If your Hyundai R210 excavator has loud knocking noise while swinging, rotary jitter, weak swing power under load, or metal powder found when changing swing gear oil, you need to disassemble and check the second‑stage planetary set.

Q2: Can this assembly fit other Hyundai excavator models? A: This assembly is mainly matched for Hyundai R210. Please cross‑reference your old part numbers XKAQ‑00075 / XKAQ‑00023 / XKAQ‑00011 before order placement. Do not install on non‑corresponding models blindly.

Q3: What key points should notice during installation? A: Thoroughly clean all worn metal residues inside swing gearbox cavity. It is recommended to replace matching bearings and oil seals at the same time. Fill with qualified swing gear oil after installation, run no‑load rotation test before putting excavator into heavy‑load construction work.

Q4: What is covered by product warranty? A: Warranty covers manufacturing‑related defects. Damage caused by wrong installation, poor lubrication and overload operation is outside warranty scope. Please operate according to excavator official maintenance guidelines.