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281L
cissoko
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The Parker Chelsea 281L Series Power Take-Off (PTO)isa medium-duty, extended-shaft PowerShift PTO designed specifically for Allison 3000 and 4000 Series automatic transmissions. It bridges a crucial market gap by combining the internal drivetrain and economy of the standard Chelsea 281 Series with the extended-shaft housing architecture of the heavy-duty 871L Series . This design provides the necessary structural clearance to mount larger hydraulic pumps directly to the transmission without interference from vehicle chassis rails, coolers, or retarders—offering a highly cost-effective alternative to premium heavy-duty models
Extended Shaft Design for Pump Clearance : The "L" designation signifies the extended output housing . This layout shifts the hydraulic pump mounting flange further rearward, clearing transmission retarders, coolers, and frame rails while allowing vocational trucks to use higher-displacement, bulkier pumps.
Ductile Iron Bearing Cap : Built with an upgraded ductile iron rear bearing cap that is 117% stronger than the gray iron housings found on older designs. This modification provides massive structural rigidity to safely support heavy overhung pump weights.
Optimized Vocational Cost Savings : Ideal for fleet operators who require extended-shaft clearances but do not exceed 400 lb-ft torque demands. It completely eliminates the need to buy expensive, heavy-duty 871L units just to get proper clearance.
Engine-Driven Left and Right Versatility : Configured as a true engine-driven system. It can be ordered to mount on either the left or right-side opening of the transmission depending on tool layouts.
| Parameter | Specification / Value |
|---|---|
| Mounting Type | 10-Bolt Aperture Footprint Configuration |
| Shift Type | PowerShift — Hydraulic or Electro-Hydraulic, suitable for hot shifting under power |
| Intermittent Torque Rating | 301–400 lb-ft (501+ Nm) |
| Output Power | 56+ HP (51+ kW) |
| Transmission Compatibility | Allison 3000/4000 Series, including variants equipped with auxiliary retarders and oil coolers |
| Output Options | SAE B, 2- or 4-bolt; SAE C, 2- or 4-bolt; ISO 7652 pump flanges; or direct cross-driveline companion flanges |
| Lubrication Options | Pressure Lube (P) or Wet Spline (W), designed to help prevent fretting corrosion on pump shafts |
Applications
Fire and Rescue Vehicles : Provides immediate, high-horsepower engagement under load to drive high-volume water pumps and aerial ladders.
Dump Trucks & Trailers : Operates the large hydraulic cylinders needed to raise and lower heavy dump beds quickly and safely.
Cranes & Boom Trucks : Supplies smooth, continuous hydraulic flow for precise control of telescopic booms and outriggers.
Vacuum & Sewer Cleaner Trucks : Runs high-capacity vacuum pumps and high-pressure water jetters for municipal and industrial cleanup.
Fuel & Chemical Tankers : Drives product pumps to safely offload bulk liquids and hazardous materials.
281L PTO are typically packaged securely to prevent damage during transit. The packaging includes:
Protective Wrapping: To safeguard the pump 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 2 to 6 weeks from the order date.
Answer : The main difference is the physical length of the output housing . The standard 281 is compact, which can cause large hydraulic pumps to hit the transmission oil cooler or chassis. The 281L features a lengthened shaft housing that pushes the pump flange backward, ensuring seamless clearance over obstructions.
Answer : No. Because the extended shaft housing interfaces differently with surrounding transmission components (especially if your transmission has a cooler or retarder option), specific mounting brackets and bolt kits must be sourced separately based on your unique configuration.
Answer : The Wet Spline (W) configuration introduces a constant bath of transmission fluid directly into the internal mating splines of the PTO and the hydraulic pump shaft. This continuous oil coating completely eliminates fretting corrosion , preventing the pump shaft from binding or stripping out inside the PTO clutch over time.
Answer : It is an engine-driven configuration . On Allison 3000/4000 series automatic transmissions, the PTO drive gear is tied directly to the engine's torque converter impeller hub. This means the PTO operates at a speed proportional to engine RPM, providing continuous hydraulic power whether the truck is moving or stationary .
Answer : No. The 281L provides the identical pump clearance profile as the 871L but uses the standard 281 internal gearing. It is limited to a maximum intermittent torque rating of 400 lb-ft . If your vocational equipment draws more than 400 lb-ft of torque, you must step up to the heavier-duty 871L Series.
6. 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.
281L PTO 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 PTO does not contain hazardous materials.
Factory Testing: Every PTO is rigorously tested for performance, pressure, and leak integrity before shipping.
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.
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.
Of course we can. Just send me your logo we can make it for you.
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%).
The Cissoko 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.
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.
Cissoko 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.
All hydraulic pumps produced by Cissoko Hydraulic have undergone compliance testing, ensuring their quality and reliability.
To meet the diverse needs of different industries, the Cissoko 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.
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.
