JMF29 Swing Motor for Mini Excavator spare parts

Short Description:

The JMF29 swing motor is a universal high-precision integrated swing drive assembly independently developed for 6-8 ton mini excavators, compatible with most mainstream domestic and imported small digging models.

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Product Detail

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description

The JMF29 swing motor adopts industrial-grade mini axial plunger hydraulic structure, matched with precision-ground carburized-quenched planetary reduction gears. The gear tooth surface undergoes strict hardening and fine polishing treatment, featuring compact structure, high transmission efficiency, low noise and excellent anti-fatigue performance, fully adapting to frequent start-stop, high-frequency forward and reverse rotation and long-term intermittent variable-load operation of 6-8 ton mini excavators. The built-in high-sensitivity wet multi-disc brake adopts spring pressure-holding and hydraulic release design, achieving fast and accurate mechanical locking after rotation stops, completely eliminating slight drifting risks during small-angle slope parking and static standby, greatly improving construction precision and operational safety. The upgraded high-precision friction pair optimizes micro oil distribution clearance, effectively restraining low-pressure internal leakage and power attenuation caused by long-term frequent cyclic operation, restoring flexible, smooth and sensitive swing performance.

product parameters

Product Model: JMF29 Swing Motor

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

Applicable Equipment: Universal for 6-8 Ton Domestic & Imported Mini Excavators

Structural Features: Miniature Axial Plunger Structure, Carburized-Quenched Precision Planetary Gear, Compact Wet Multi-Disc Brake, Universal Integrated Structure, Standard Oil Port Layout, Load-Sensing Hydraulic Adaptation

Core Material: High-Strength Alloy Gear, Lightweight Reinforced Housing, High-Precision Wear-Resistant Friction Pair, Aging-Resistant Composite Seal

Working Performance: Flexible Swing Response, Stable Low-Speed Operation, Low Noise, Accurate Positioning, Reliable Brake Locking, Low Micro Leakage

Working Type: 6-8 Ton Universal Mini Integrated Swing Drive Assembly

Rated Swing Pressure: 20–28bar

Output Torque: Matched with standard 6-8 ton mini excavator factory parameters

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

Rotation Direction: Bidirectional Forward & Reverse Swing

Installation Mode: Standard universal mounting hole & spline, 1:1 direct replacement without modification

advantages

Wide Universal Compatibility, Lossless Direct Replacement: Adopts industry-standard universal mounting holes, spline specifications and oil port layout, compatible with most 6-8 ton mini excavator models. No shell processing or pipeline modification is required during replacement, which greatly reduces equipment maintenance time and improves repair efficiency.
Precision Hardened Gear Set, Low Noise & Durable: The planetary gear set adopts carburizing quenching and ultra-precision grinding technology, with smooth gear meshing, low operating noise and strong anti-fatigue performance. It effectively resists frequent start-stop and reversing impact of small excavators, avoiding gear wear, abnormal noise and slow rotation aging faults.
High-Sensitivity Wet Brake, Eliminate Micro Drifting: Optimized spring pressure-holding structure provides stable and sensitive parking braking force. It thoroughly solves the common problems of delayed brake response, incomplete locking and slight upper-structure drifting during static parking and small-angle slope operation of old mini excavators, improving fine construction accuracy and safety.
Optimized Micro Clearance Friction Pair, Suppress Low-Pressure Leakage: Upgraded high-precision friction pair optimizes micro oil distribution gap, effectively restraining low-pressure internal leakage and power attenuation caused by long-term high-frequency cyclic operation, restoring flexible and smooth swing response, and solving low-speed jitter and sluggish rotation faults.

FAQ

Q1: Which excavators is the JMF29 swing motor suitable for?
A: The JMF29 swing motor is universally applicable to all 6-8 ton domestic and imported mini excavators, compatible with most mainstream small digging models in the market, with strong versatility.
Q2: What core faults can the JMF29 swing motor solve?
A: It effectively repairs common aging faults of mini excavator swing systems: weak swing torque, slow slewing speed, low-speed jitter, incomplete brake locking, slight body drifting, low-pressure internal leakage and housing micro oil seepage.
Q3: Does installation require equipment modification?
A: No modification is required. Standard universal mounting size, spline and oil-port layout support 1:1 plug-and-play direct replacement, fully compatible with standard mini excavator overhaul processes.
Q4: Why is the swing still unsmooth after replacement?
A: It is mostly not a motor failure. Please check the cleanliness of hydraulic oil, pipeline blockage and pilot valve working condition. Dirty oil is the main cause of unsmooth swing of mini excavators.
Q5: What are the daily maintenance tips for JMF29 swing motor?
A: Keep the hydraulic oil clean and replace filter elements regularly; avoid violent impact swing operation; regularly check for micro oil seepage and test brake locking performance to extend the service life of the assembly.

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.