SK135 Swing Motor for Kobelco SK135 Excavator spare parts

Short Description:

The SK135 swing motor is an integrated swing drive assembly professionally customized for Kobelco 13-ton SK135 hydraulic excavator, matching the original high-precision negative flow hydraulic system.

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Product Detail

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description

The SK135 swing motor adopts compact heavy-duty axial plunger hydraulic structure, paired with precision-ground carburized-quenched planetary reduction gears. The gear tooth surface undergoes hardening and fine polishing treatment to improve hardness, wear resistance and impact resistance, fully adapting to the frequent flexible swing and long-term variable-load operation characteristics of 13-ton Kobelco urban construction 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 micro oil distribution clearance, suppresses internal leakage and pressure attenuation under long-term high-temperature variable-load operation, and restores the original smooth and sensitive 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: SK135 Swing Motor

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

Applicable Equipment: Kobelco SK135 13-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, Low-Speed Smooth Rotation, Reliable Brake Locking, Low Internal & External Leakage

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

Applicable Scenarios: Municipal Trenching, Road Renovation, Earth Backfilling, Fine Grading, Slope Construction, Long-Term Urban Continuous Operation

Matching Parts: Fully compatible with original SK135 slewing bearing, main control valve and hydraulic pipeline system.

Output Torque: Matched with Kobelco SK135 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 SK135 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 flexible swing impact of urban municipal operations, avoiding gear pitting, abnormal noise and early wear of aging Kobelco equipment.
Optimized Friction Pair, Eliminate Internal Leakage & Weak Swing: Upgraded precision valve plate and shoe matching optimizes micro oil distribution clearance, effectively suppresses internal leakage and pressure attenuation under long-term variable-load operation, restores original sensitive and powerful swing torque, and solves the problems of slow swing speed and jittery low-speed rotation.
Reinforced Sealing System, Adapt To Urban Harsh Working Conditions: Adopt multi-layer composite high-temperature and oil-resistant sealing components, which can resist hydraulic oil corrosion and seasonal temperature cycle aging. It permanently solves the external oil leakage problem of old machines and reduces later maintenance frequency and cost.
Full-Process Factory Testing, Stable & Durable: Each SK135 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 Kobelco SK135 13-ton excavator, it is an integrated swing motor assembly with reducer and wet brake, not universal for other Kobelco tonnage or series models.
Q2: What main faults can the SK135 swing motor repair?
A: It solves typical aging faults of SK135 original swing system: insufficient swing torque, slow slewing speed, low-speed swing jitter, 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 SK135 swing motor?
A: Keep hydraulic oil clean and replace filter elements regularly; avoid long-term frequent high-frequency 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.