EATON 104-3728-006 Hydrauluic Motor 477

( Brand: Eaton ), ( Manufacturer Part Number: 104-3728-006 ), ( Part Type: Motor )

Review EATON Hydrauluic Motor 477

The **Eaton 104-3728-006 Hydraulic Motor (Model 477)** is a high-performance, precision-engineered hydraulic component designed for demanding industrial, mobile, and off-highway applications where reliability, efficiency, and durability are paramount. Part of Eaton s renowned **Hydraulics Division**, this motor belongs to the **477 series**, a line of robust, radial-piston axial motors renowned for their compact yet powerful design, making them ideal for use in heavy machinery, agricultural equipment, construction vehicles, and specialized mobile platforms. Engineered with a **gerotor-type displacement mechanism**, this motor delivers smooth, consistent power output while maintaining exceptional torque characteristics, ensuring optimal performance even under fluctuating load conditions. Its **closed-loop design** minimizes internal leakage, enhancing overall efficiency and reducing heat generation, which is critical for prolonged operation in high-temperature environments.

The **104-3728-006** features a **displacement of 37.28 cm /rev (2.27 in /rev)**, providing a balanced output suitable for medium to high-pressure hydraulic systems typically operating between **207 and 345 bar (3,000 and 5,000 psi)**. Constructed from **high-grade steel and precision-machined components**, the motor s internal elements including the **rotor, stator, and swashplate assembly** are treated with advanced surface hardening techniques to resist wear, fatigue, and corrosion, extending the motor s operational lifespan even in the harshest conditions. The **sealed bearing system** and **precision-ground shafts** ensure minimal friction and vibration, contributing to quieter operation and reduced maintenance requirements. Additionally, the motor s **integrated cooling passages** and **optimized fluid flow paths** help dissipate heat efficiently, preventing thermal degradation and ensuring stable performance over extended use.

For enhanced versatility, the **104-3728-006** is equipped with a **standard SAE J784 flange mounting**, allowing for easy integration into existing hydraulic systems with minimal modifications. Its **reversible design** enables bidirectional operation, making it suitable for applications requiring both forward and reverse motion, such as winches, cranes, or tracked vehicles. The motor s **adjustable swashplate mechanism** also allows for **displacement control**, enabling operators to fine-tune flow rates and torque output to match specific application demands. Whether deployed in **agricultural harvesters, mining equipment, forestry machinery, or marine systems**, this motor delivers the **consistency, power, and longevity** expected from Eaton s legacy of hydraulic innovation. Built to withstand the rigors of continuous operation, the **104-3728-006** is a testament to Eaton s commitment to engineering solutions that balance performance, reliability, and operational efficiency in the most challenging environments.

### **Pros and Cons of buying a Eaton 104-3728-006 Hydraulic Motor (477 Series)**

1. **High Reliability and Durability** Eaton is a well-established brand known for manufacturing robust hydraulic components. The 477 series is designed for heavy-duty applications, offering long service life under demanding conditions.

2. **Proven Performance in Industrial Settings** This motor is commonly used in construction, mining, and material handling equipment, where consistent power and efficiency are critical. Its design ensures smooth operation under high loads.

3. **Compatibility with Eaton s Ecosystem** Since Eaton produces a wide range of hydraulic components, this motor integrates seamlessly with other Eaton pumps, valves, and controls, reducing compatibility issues.

4. **Good Availability of Parts and Support** Eaton has a strong aftermarket presence, meaning replacement parts, service manuals, and technical support are widely accessible.

5. **Efficient Power Transmission** The motor is designed for high torque and efficiency, reducing energy waste and improving overall system performance.

6. **Modular Design** Some variants of the 477 series allow for easy maintenance and component replacement without full motor overhaul.

7. **Widely Trusted in the Market** Many operators and fleet managers prefer Eaton due to its reputation for quality, making this motor a safer choice for long-term use.

1. **Higher Upfront Cost** Compared to some generic or aftermarket alternatives, Eaton motors tend to be more expensive, which may be a barrier for budget-conscious buyers.

2. **Potential Overkill for Light-Duty Applications** If the motor is being used in a low-load or infrequent-use scenario, its robust design may be unnecessary, leading to wasted investment.

3. **Complexity in Installation and Maintenance** Due to its precision engineering, installation may require specialized knowledge, and maintenance could be more involved than simpler, cheaper alternatives.

4. **Limited Customization Options** Unlike some OEM-specific motors, Eaton s standard models may not offer as many customization options for unique applications.

5. **Depreciation Over Time** While durable, like all machinery, it will eventually wear out. The resale value may not fully recoup the initial cost, especially if newer models emerge with improved features.

6. **Dependence on Eaton s Support Network** If local Eaton dealerships or authorized service centers are scarce, finding quick repairs or replacements could be challenging.

7. **Potential for Counterfeit Parts** In some markets, counterfeit Eaton parts circulate, which could compromise performance and safety if not sourced carefully.

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### **Conclusion**

The **Eaton 104-3728-006 (477 Series) hydraulic motor** is an excellent choice for applications requiring **high reliability, durability, and efficiency**, particularly in heavy-duty industrial, construction, or mining environments. Its reputation for performance and compatibility with Eaton s ecosystem makes it a trusted long-term investment. However, the **higher cost, complexity, and potential over-engineering for lighter applications** may not justify the purchase for all users.

If **budget is not a constraint** and the motor will be used in a **high-stress, high-reliability setting**, it is a strong recommendation. For **lower-demand applications or cost-sensitive buyers**, alternatives like **reputable aftermarket brands or OEM-specific motors** (if compatible) might offer a better balance of performance and affordability.

- You need a **long-lasting, high-performance motor** for heavy-duty use.

- Compatibility with Eaton s other components is a priority.

- You can afford the **premium price** and have access to proper maintenance support.

- Your application is **light-duty or infrequent**, making the motor s robustness unnecessary.

- You are working with a **tight budget** and can find a **reliable, lower-cost option** that meets your needs.

- You lack **expertise in hydraulic systems**, as installation and maintenance may require professional assistance.

For most **industrial, commercial, or large-scale operations**, the Eaton 477 series remains a **sound investment** due to its proven track record. Always verify **specific application requirements** and **local market availability** before purchasing.

Details:

14.35 .565 DOA. Key Details for 104-3728-006: Manufacturer: Deafness Eaton/Char-Lynn. Holes On 146.0 5.75 DOA. Type: Hydraulic Motor.

Series: 2000 Series Disc Valve. This is a high-torque, low-speed motor featuring disc valve technology and Growler power element, commonly used in industrial mobile machinery applications for heavy-duty, high-pressure, high-efficiency performance.

specifications hydraulimoto:

• brand: Eaton
• mpn: 104-3728-006
• part type: Motor

seller hydraulimoto:

• city: Corvallis, Oregon
• # reviews: 749
• rating: 100.0%

returns hydraulimoto:

• policy: No Returns

shipping hydraulimoto:

• cost: $52.78
• type: Calculated
• service: UPS Ground Saver
• transit: 5-12 Days
• class: Economy
• carrier: UPS

offer hydraulimoto:

• options: Ship-to-home
• quantity: 5
• availability: In Stock
• started: February 5, 2026
• sold: 0
• best offers: True

payments hydraulimoto:

• wallet: Apple-pay
• other
• credit card: Mastercard

general hydraulimoto:

• Business Industrial > Hydraulics, Pneumatics, Pumps Plumbing > Hydraulic Pneumatic Motors
• condition: New

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