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899
cissoko
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The Parker Chelsea 899 Series Power Take-Off (PTO) isan industrial-grade, ultra-heavy-duty constant mesh (non-shiftable) extended-housing PTO engineered exclusively to interface with the Allison 4700 Series automatic transmission.
Uncompromising One-Piece Extended Shaft: Built as a single integrated unit rather than a separate PTO combined with a bolt-on shaft extension. This design completely eliminates intermediate connection splines, removing a common wear point and drastically increasing torque threshold limits under heavy shock loading.
Rear-Flange Frame Cavity Clearance: By shifting the pump interface completely to the rear of the transmission casing, the overall width of the unit alongside the gearbox is minimized. This allows the main gear section to fit tightly within the restricted gap between the transmission and narrow truck frame rails.
Standard Anti-Fretting Wet Spline Output: Features Chelsea’s Wet Spline (W) lubrication design as a standard configuration. This provides a constant bath of pressurized transmission oil directly over the mating pump shaft splines, completely eliminating fretting corrosion and extending pump lifespan.
Versatile Cooler and Retarder Adaptation: The casing geometry can be specifically ordered in specialized arrangements to clear transmission retarders, side-mounted oil coolers, or both simultaneously, allowing municipal truck fleets to run high-displacement hydraulic pumps.
Optimized Piston Pump Synergy: Because it operates on a constant mesh platform, it provides immediate, non-stop power directly proportional to engine RPM. It functions as an ideal power source for advanced variable displacement piston pumps that cycle internally, ensuring maximum fluid performance.
| Parameter | Specification / Value |
|---|---|
| Transmission Compatibility | Designed exclusively for Allison 4700/4800 Family automatic transmissions |
| Mounting Footprint | Standard heavy-duty 10-bolt vocational mounting aperture |
| Shift Mechanism | Constant Mesh, non-shiftable live-engine-drive configuration for permanent tool engagement |
| Power Take-Off Shaft | Solid-steel one-piece main shaft that eliminates intermediate internal connection splines |
| Intermittent Torque Rating | Up to 670 lb-ft (908 N·m), depending on the selected internal gear ratio |
| Maximum Output Power | Up to 128 HP (95 kW), or a baseline of 56+ HP (51+ kW) under continuous-load curves |
| Lubrication System | Factory-standard Wet Spline (W) technology with pressurized transmission-oil passages |
| Output Flange Options | SAE C 4-bolt standard; optional SAE B 2-/4-bolt, DIN 100, or DIN 120 flanges |
| Output Shaft Options | Primarily SAE C, 1-1/4 in 14-tooth pump spline; optional SAE B or SAE BB configurations |
| Structural Support | Side-mounted 10-bolt transmission interface reinforced by a secondary rear-transmission stabilizer bracket |
| Approximate Installed Weight | 86 lb (39 kg) |
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.
899 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 : While both are heavy-duty, 10-bolt extended-shaft PTOs designed for the Allison 4700 transmission, the Chelsea 892 utilizes a shiftable PowerShift clutch pack to turn the PTO on and off. The Chelsea 899 is a Constant Mesh unit with no internal clutch, meaning its output shaft turns continuously whenever the truck engine is running.
Answer : Because the extended one-piece main shaft pushes the hydraulic pump mounting flange completely beyond the rear of the transmission casing, a large hydraulic pump can create severe overhung weight. To absorb intense road vibrations and prevent chassis torsion, the unit must be anchored via the side 10-bolt pattern and reinforced with the rear support bracket .
Answer : It is heavily discouraged. Because the constant mesh gears turn continuously with the engine, a fixed-displacement pump would pump oil non-stop at high pressure, leading to extreme fluid overheating and rapid system failure. The 899 series is engineered to pair with variable displacement piston pumps that can safely de-stroke to zero flow when hydraulic tools are not in use.
Answer : No. While some alternative heavy configurations support SAE D mounts, the Chelsea 899 casing architecture standardizes around an SAE C output flange (1-1/4" - 14T pump spline) . This configuration is specifically chosen to maintain structural safety margins and clear the adjacent transmission tail components.
Answer : Metal-on-metal friction between a dry PTO output and a pump shaft creates microscopic movement that causes fretting corrosion, eventually welding the shafts together or stripping the teeth. The Wet Spline configuration keeps the mating shafts constantly lubricated in filtered oil , making it easy to swap or service hydraulic components years later without shaft damage.
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.
899 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.
