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281 SERIES

The Green Hydraulic 281 Series is a heavy-duty PTO built for reliable power transfer in demanding mobile applications. Featuring high-strength ductile iron construction, upgraded sealing, and a reinforced clutch pack, it delivers long service life with minimal wear. With optional wet spline lubrication, multiple speed ratios, SmartStart, and Electronic Overspeed Control, it is ideal for fire trucks, cranes, refuse trucks, and other special vehicles.
  • PTO281

  • Green Hydraulic

  • Yes

  • ISO9001,CE

  • • Industrial • Energy • Government (Non Aerospace) • HVAC • Mobile • Natural Resources • Transportation (Non Aerospace)

  • 1.Agricultural Equipment 2.Industrial Machinery 3.Construction Equipment 4.Material Handling

  • Key Shaft and Spline shaft

  • 1 set

Availability:
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Product Description

281 SERIES111_946_946

Features and Benefits

  • High-Strength Ductile Iron Bearing Cap
    Offers 117% greater strength compared to standard gray iron for improved durability under heavy loads.
  • Enhanced O-Ring Sealing System
    Reduces vibration-related issues and increases clamp load stability for more reliable performance.
  • Upgraded Clutch Pack Design
    Features steel disks that are 80% thicker, significantly lowering the risk of premature tooth wear.
  • Consistent Continuous-Duty Torque Rating
    Maintains a single, stable torque output ideal for long-running applications.
  • Adjustable Rotatable Cast Iron Flanges
    Allow precise pump clearance adjustment for easier installation and better fit.
  • Built-In Driveline Output Positive Stop
    Prevents oil seal damage caused by coupling misalignment or excessive movement.
  • Optional Wet Spline Lubrication
    Delivers 7 to 10 times longer shaft service life compared to standard configurations.
  • Wide Range of Speed Ratios
    Nine available ratios cover both low-speed and high-speed operational requirements.
  • SmartStart Technology
    Minimizes startup shock loads, protecting components in sensitive applications.
  • Electronic Overspeed Control (EOC)
    Provides critical protection for driven equipment against over-speed conditions.

Specifications

Model Codes
22
281 SERIES Installation Dimensions

33

Applications

Applications

The 281 SERIES Power Take-Off (PTO) provides stable and high-efficiency dual-flow hydraulic performance for industrial and mobile hydraulic systems requiring compact structure, reliable pressure, and continuous operation:

  • Fire and Rescue Trucks: Delivers consistent dual hydraulic flow for emergency equipment, rescue tools, and auxiliary systems to ensure reliable performance during critical operations.

  • Truck Cranes: Powers both lifting and slewing functions simultaneously, offering steady pressure and smooth oil flow for precise crane control.

  • Pumper Cleaner Trucks: Supports both water pumping and high-pressure cleaning circuits, meeting the demand for continuous, efficient dual hydraulic output.

  • Refuse Trucks: Provides independent hydraulic power for compaction, lifting, and dumping systems, ensuring dependable operation in waste collection and disposal tasks.


9

Factory&FAQ

Packaging & Delivery

VG11 Series Double Hydraulic Gear Pump-transportation

281 SERIES Power Take-Off (PTO) are typically packaged securely to prevent damage during transit. The packaging includes:

Protective Wrapping: To safeguard the pumps from environmental damage.

Custom Crates: For larger, heavier pumps, ensuring safe handling.

Documentation: Includes installation, maintenance instructions, and warranty details.

Delivery time depends on the model, customizations, and location but typically ranges from 1-30days from the order date.


VG11 Series Double Hydraulic Gear Pump FAQ:


1. What is the 281 Series (PTO)?


The 281 Series is a double hydraulic gear pump designed for stable dual-flow output and reliable performance in industrial and mobile hydraulic systems.


2. What makes the 281 Series different from standard gear pumps?


  • Stronger High-strength Casting

    It uses ductile iron bearing caps, 117% stronger than grey iron used in standard pumps, delivering far heavier shock and load resistance for heavy-duty truck hydraulic systems.

  • Upgraded Sealing & Structural Stability

    Adopts O-ring sealing layout to resist vibration leakage; rotatable cast flanges optimize installation clearance, while positive driveline stops prevent oil seal damage common in regular pumps.

  • Heavy-Duty Enhanced Transmission Components

    Thicker clutch steel discs (80% thicker than standard) reduce gear wear; optional wet spline lubrication extends shaft service life 7–10× longer than conventional dry spline designs.

  • Higher Torque & Multi-Speed Matching

    Features continuous-duty high torque ratings and 9 flexible speed ratios, covering low/high-speed heavy loads; standard pumps only support fixed single-speed conventional pressure output.

  • Built-In Shock & Overspeed Protection

    Equipped with SmartStart to cut startup impact loads and Electronic Overspeed Control (EOC); standard gear pumps lack dedicated drivetrain overload & speed protection functions.

  • Superior Durability & Maintainability

    Optimized bearing load design, longer service life, simpler installation and lower long-term maintenance costs compared to general-purpose industrial standard gear pumps.


3. What is the working pressure range of 281 Series pumps?


The 281 Series is suitable for medium and high-pressure hydraulic systems:

  • Continuous Pressure: Up to 25 MPa (≈ 3600 PSI).

  • Maximum Pressure: Up to 30 MPa (≈ 4350 PSI).
    It is widely used in construction machinery, industrial equipment, and hydraulic power systems.


4. Can 281 Series pumps replace other brands?


Yes, the 281 Series can replace many standard double hydraulic gear pumps, including:

  • Parker Gear Pumps

  • Rexroth Hydraulic Pumps

  • Commercial Double Gear Pumps
    Please verify mounting dimensions, shaft type, and displacement before replacement.


5. What hydraulic oil is recommended for 281 Series pumps?


For stable performance and extended service life:

  • Oil Type: Anti-wear hydraulic oil (AW type).

  • Viscosity: ISO VG32–VG68 recommended.

  • Filtration: Clean hydraulic oil helps reduce internal wear and maintain pump efficiency.


6. What is the typical speed range of 281 Series pumps?


The 281 Series supports flexible operating conditions:

  • Minimum Speed: 600 RPM

  • Recommended Speed: 800–2500 RPM

  • Maximum Speed: Up to 3000 RPM depending on displacement and operating conditions.



7. Do you provide OEM or customized services?

Yes, we support OEM and customization, including nameplate, packaging, and specific performance requirements. Send us your drawings or specifications for evaluation.

8. How can I get a quotation quickly

Please provide the following details:

  • Model or displacement

  • Working pressure

  • Speed

  • Quantity
    We will reply within 12 hours with a competitive quotation.


Certifications & Quality Assurance

281 Series Pumps are manufactured in compliance with international standards, ensuring high performance and reliability:

ISO 9001: Certified for quality management systems.

CE Certification: Ensures compliance with European safety, health, and environmental protection standards.

RoHS Compliance: Ensures the pump does not contain hazardous materials.

Factory Testing: Every pump is rigorously tested for performance, pressure, and leak integrity before shipping.



Green Hydraulic Patent Certificate

FAQ

1.What's our advantages?

Factory established in 2005;

With a great deal of production experience;

80+ employees become the professional team;

Constant updated ERP system ensure efficiency of work;

Sophisticated equipment ehanced the accuracy of products;

Professional salesmen provide the greast service;

With a large number of famous customers all over the world;

Great after-sales service;

With the long term cooperation with famous logistics and express company in China,provide the better goods service.


2.What is your payment terms?

Small order/sample order,full payment in advance; Big orders send the first payment 30% before the production,and the balance before shippment.We'll show the photos of the products and packages before delivery.


3.Can you make my own brand on the products?

Of course we can. Just send me your logo  we can make it for you.


4.What is our main export market?

America(40.5%):USA, Canada, Argentina, Brazil

Europe(30.8%):Italy,Germany,England,Holland,Spain,Swiss,Finland,Russia,Poland.

Asia(23.5%):Korea,singapore,India,Turkey,Vietnam,Saudi Arabia,Syria, Israel,Lebanon.

Others(5.8%).


Unedited footage of the Green Hydraulic Factory

The Green hydraulic pump manufacturing facility is a specialized industrial plant that focuses on producing hydraulic pumps and related components. These factories are equipped with advanced machinery and technology to fabricate high-quality pumps designed for a wide range of applications, from heavy equipment and machinery to automotive and industrial systems.

Unedited footage of the Green Hydraulic Factory

The production process typically involves precision engineering, where raw materials like metals and alloys are processed into pump components such as gears, pistons, cylinders, and seals. These parts are then assembled into fully functional hydraulic pumps, which are tested for performance and quality control to ensure reliability, efficiency, and durability under various working conditions.

Unedited footage of the Green Hydraulic Factory

Green Hydraulic's manufacturing facilities for hydraulic pumps maintain stringent quality standards, often adhering to international certifications, to meet the expectations of customers in industries such as construction, agriculture, automotive, and manufacturing.

Unedited footage of the Green Hydraulic Factory3

All hydraulic pumps produced by Green Hydraulic have undergone compliance testing, ensuring their quality and reliability.

Unedited footage of the Green Hydraulic Factory4

To meet the diverse needs of different industries, the green hydraulic offer customization options, such as specialized seals, materials, and pump configurations. These facilities often work closely with engineering teams to develop tailored solutions for specific applications, from high-pressure systems to low-flow, high-efficiency pumps.

Unedited footage of the Green Hydraulic Factory5

Each pump undergoes a rigorous quality control process, where pressure tests and performance assessments are conducted to ensure that the pumps meet the required standards for flow rate, pressure capacity, and durability.


Green Hydraulic Advantages
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