SH200A3 Swing Motor for Sumitomo SH200A3 Excavator spare parts

Short Description:

The SH200A3 swing motor is an integrated swing drive assembly professionally customized for Sumitomo 20-ton SH200A3 hydraulic excavator, matching the original high-efficiency hydraulic control system.

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Product Detail

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description

The SH200A3 swing motor adopts heavy-duty axial plunger hydraulic structure, paired with precision-ground carburized-quenched planetary reduction gears. The gear tooth surface is hardened and finely polished to improve overall hardness, wear resistance and impact resistance, fully adapting to frequent forward-reverse swing impact and long-cycle variable-load operation of 20-ton Sumitomo excavators. The built-in high-sensitivity wet multi-disc brake adopts spring pressure holding and hydraulic release design, achieving instant mechanical locking after swing stop, which thoroughly avoids upper-structure drifting on slope construction and greatly improves operation safety. The upgraded high-precision valve plate and shoe friction pair optimizes oil distribution clearance, suppresses internal leakage and pressure attenuation under long-term high-temperature heavy-load operation, and restores the original linear and powerful swing performance of the equipment. Equipped with multi-layer composite high-temperature and oil-resistant sealing kits, it resists hydraulic oil erosion and seasonal temperature aging, effectively reducing external oil leakage failure rate.

product parameters

Product Model: SH200A3 Swing Motor

Product Type: Integrated Swing Drive Motor with Reducer & Wet Parking Brake

Applicable Equipment: Sumitomo SH200A3 20-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: Sensitive Swing Response, Stable Torque Output, No Stop Jitter, Reliable Brake Locking, Low Internal & External Leakage

Core Functions: Provide stable rotary driving torque for upper structure, realize accurate swing positioning and anti-slip parking, match original hydraulic system cycle operation.

Applicable Scenarios: Large-Volume Earthwork Piling, Hard Soil Excavation, Material Loading & Unloading, Slope Construction, Long-Term Continuous Site Operation

Rated Swing Pressure: 24–30bar

Output Torque: Matched with Sumitomo SH200A3 factory standard

Brake Mode: Spring-Engaged Wet Multi-Disc Parking Brake, Hydraulic Pressure Release

Rotation Direction: Bidirectional Forward & Reverse Swing

advantages

Original Factory Zero-Error Matching, Lossless Plug-and-Play: Strictly follow SH200A3 original drawing standards for mounting holes, spline parameters and hydraulic port positions. No casing processing, pipeline cutting or welding is required during on-site replacement, greatly shortening equipment maintenance downtime and improving overhaul efficiency.
Quenched Gear Train, Strong Anti-Impact & Anti-Wear Ability: The planetary gear set adopts carburizing and quenching precision grinding process, with excellent surface hardness and fatigue resistance. It copes with frequent forward-reverse swing impact of 20-ton earthwork operations, avoiding gear pitting, abnormal noise and early wear of aging Sumitomo equipment.
High-Sensitivity Wet Brake, Effectively Prevent Upper-Structure Drifting: Optimized spring pressure holding structure provides stable and reliable parking brake torque. It perfectly solves the common faults of slow brake response, slipping and body drifting of aging SH200A3 excavators during slope and offset operation, improving construction safety.
Optimized Friction Pair, Eliminate Internal Leakage & Weak Swing: Upgraded precision valve plate and shoe matching optimizes oil distribution clearance, effectively suppresses internal leakage and pressure attenuation under long-term high-temperature heavy-load operation, restores original powerful swing torque, and solves the problems of slow swing speed and weak loaded rotation.
Full-Process Factory Testing, Stable & Durable: Each SH200A3 swing motor undergoes torque calibration, brake holding test, high-pressure sealing test and impact aging test. The performance is stable and consistent, which significantly improves the operating stability and residual value of overhauled equipment.

FAQ

Q1: Which excavator is this swing motor suitable for?
A: Exclusively customized for Sumitomo SH200A3 20-ton excavator, it is an integrated swing motor assembly with reducer and wet brake, not universal for other Sumitomo tonnage or series models.
Q2: What main faults can the SH200A3 swing motor repair?
A: It solves typical aging faults of SH200A3 original swing system: insufficient swing torque, slow slewing speed, swing jitter when stopping, 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, completely compatible with standard overhaul procedures.
Q4: What causes drifting after replacing the swing motor?
A: In addition to the motor itself, check the brake pilot pressure, brake relief valve pressure, slewing bearing clearance and main valve swing spool wear condition to eliminate system hydraulic and mechanical clearance anomalies.
Q5: Daily maintenance tips for SH200A3 swing motor?
A: Keep hydraulic oil clean and replace filter elements regularly; avoid long-term frequent heavy-impact swing operation; regularly check motor for oil leakage and test brake holding performance on 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.