SK250‑8 Swing Motor for Kobelco SK250‑8 Excavator spare parts

SK250‑8 Swing Motor for Kobelco SK250‑8 Excavator spare parts Featured Image
  • SK250‑8 Swing Motor for Kobelco SK250‑8 Excavator spare parts
  • SK250‑8 Swing Motor for Kobelco SK250‑8 Excavator spare parts
  • SK250‑8 Swing Motor for Kobelco SK250‑8 Excavator spare parts

Short Description:

The SK200‑8 swing motor is an integrated swing drive assembly professionally customized for Kobelco 20‑ton SK200‑8 hydraulic excavator, matching the original negative‑flow hydraulic control system.

Product Detail

Product Tags

description

The SK250‑8 swing motor adopts heavy‑duty axial plunger hydraulic structure, paired with precision‑ground carburized‑quenched planetary reduction gears. Gear tooth surfaces are hardened and finely finished to boost hardness, wear resistance and impact resistance, perfectly adapting to frequent forward‑reverse swing impact and long‑duration heavy‑variable‑load cycles of 25‑ton Kobelco construction excavators. The built‑in high‑sensitivity wet multi‑disc brake applies spring‑applied, hydraulic‑release logic, delivering instant mechanical lock‑up once swing stops to prevent upper‑structure drifting on slope sites and greatly improve operational safety. Upgraded high‑precision valve‑plate‑shoe friction pairs optimize oil‑distribution clearances, suppressing internal leakage and pressure decay under prolonged high‑temperature heavy‑load conditions and restoring the machine’s original forceful and linear swing performance. Multi‑layer composite high‑temperature and oil‑resistant seal kits resist hydraulic fluid erosion and seasonal thermal aging, lowering external oil‑leakage failure rates.

product parameters

Product Model: SK250‑8 Swing Motor
Product Type: Integrated Swing Drive Motor with Reducer & Wet Parking Brake
Applicable Equipment: Kobelco SK250‑8 25‑Ton Excavator
Structural Features: Axial Plunger Structure, Carburized‑Quenched Planetary Gear, Wet Multi‑Disc Brake, Integrated Compact Structure, OEM Standard Oil Port Layout
Core Material: High‑Strength Alloy Quenched Gear, Thickened Reinforced Motor Housing, High‑Precision Friction Pair, High‑Temperature Resistant Composite Seal
Working Performance: Responsive Swing Action, Stable Torque Output, Smooth Rotation, Reliable Brake Locking, Low Internal & External Leakage
Core Functions: Supply steady rotary driving torque for upper carbody, realize accurate swing positioning and anti‑slip parking, compatible with original negative‑flow hydraulic cyclic operation.
Working Type: 25‑Ton Integrated Swing Drive Assembly
Rated Swing Pressure: 26‑32bar
Output Torque: Matched with Kobelco SK250‑8 factory standard
Brake Mode: Spring‑Engaged Wet Multi‑Disc Parking Brake, Hydraulic Pressure Release
Rotation Direction: Bidirectional Forward & Reverse Swing

advantages

  • OEM‑Equivalent Fit, Lossless Direct Replacement: Mounting holes, spline dimensions and hydraulic port positions strictly follow SK250‑8 original drawing specifications. No housing machining, pipe cutting or welding is required during field replacement, cutting equipment downtime and improving overhaul efficiency.
  • Quenched Gear Train, Excellent Impact & Wear Resistance: Planetary gear set adopts carburizing‑quenching plus precision‑grinding process, delivering superior surface hardness and fatigue resistance. It withstands frequent heavy‑duty forward‑reverse swing shocks of 25‑ton earth‑rock jobs and prevents gear pitting, abnormal noise and premature wear on aged Kobelco machines.
  • High‑Performance Wet Brake, Effectively Prevent Upper‑Carbody Drift: Optimized spring‑loading structure delivers stable parking brake torque. It resolves typical defects of aging SK250‑8 excavators such as slow brake response, brake slippage and body drifting under slope and offset‑load conditions for enhanced site safety.
  • Reinforced Sealing Package for Harsh Site Conditions: Multi‑layer composite high‑temperature and oil‑resistant sealing components resist hydraulic fluid corrosion and cyclic temperature aging. It addresses external oil leakage common on older machines and lowers subsequent maintenance frequency and costs.
  • Full‑Factory Testing for Consistent Long‑Term Durability: Each SK250‑8 swing motor completes torque calibration, brake hold‑pressure testing, high‑pressure sealing check and impact‑aging test. Consistent performance greatly boosts operational reliability and residual value of overhauled machines.

FAQ

  • Q1: Which excavator is this swing motor suitable for?
  • A: Exclusively customized for Kobelco SK250‑8 25‑ton excavator. It is an integrated swing motor assembly with reducer and wet brake and is not interchangeable with other Kobelco tonnage or series models.
  • Q2: What main faults can the SK250‑8 swing motor repair?
  • A: It addresses typical aging defects of SK250‑8 original swing system: insufficient swing torque, slow slewing speed, swing shudder, brake slipping, upper‑structure drifting on slopes, high‑temperature internal leakage and external oil leakage.
  • Q3: Is on‑site modification required for installation?
  • A: No modification needed. 1:1 fully matched OEM installation size, spline and oil‑port layout support direct replacement, fully compatible with standard overhaul procedures.
  • Q4: What causes drifting after replacing the swing motor?
  • A: Apart from motor condition, inspect brake pilot pressure, brake relief‑valve setting, slewing bearing clearance and wear of main‑valve swing spool to eliminate hydraulic‑system and mechanical‑clearance anomalies.
  • Q5: Daily maintenance tips for SK250‑8 swing motor?
  • A: Keep hydraulic oil clean and replace filter elements on schedule; avoid prolonged heavy‑impact frequent swing cycles; periodically inspect motor for oil leakage and verify brake hold‑performance under slope conditions.

warehouse

We have built four spare parts warehouses in Xuzhou, Jining, Kunshan and Changsha to provide customers from all over the world with a variety of high-quality spare parts. We can basically ship self-provided spare parts within three days after confirming the order. If the spare parts need to be adjusted or processed, they will be shipped within 7-30 days.

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our warehouse

Pack and ship

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