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The 3-Hole UNI Hydraulic Piston Pump is a high-pressure, fixed-displacement axial piston pump designed specifically for mobile hydraulic applications, most notably for direct mounting onto a truck's Power Take-Off (PTO) unit.The designation "UNI" refers to the standard Italian/European 3-bolt mounting flange standard (featuring 3 unthreaded bolt holes and a 6×21×25 splined shaft).
High Pressure Capability: Capable of maintaining continuous working pressures ranging from 280 to 350 bar (up to 400 bar peak), which is ideal for heavy lifting and compact space constraints.
Bi-Directional / Reversible Rotation: Many models feature dual-direction rotation. This simplifies installation because the same unit works for clockwise or counter-clockwise (CCW) PTO setups.
Excellent Self-Priming: The axial piston arrangement naturally creates strong inlet suction, allowing the pump to perform efficiently even during low-speed idling.
Compact & Lightweight: Designed primarily for chassis-limited truck frameworks, offering high power output in a compact housing.
| Parameter | Specification | Unit | Remarks |
|---|---|---|---|
| Series | FOX SE Series | — | Italian Hydrocar compact heavy-duty axial piston pump |
| Flange Standard | DIN 5462 / ISO 7653 | — | 4-bolt square flange with an 80 mm pilot diameter |
| Drive Shaft Type | DIN 5462 (8 × 32 × 36) Parallel Spline | — | Standard 8-tooth splined shaft designed for heavy-duty truck PTO applications |
| Displacement Range | 16–25 (common sizes: 16.2, 21.1 and 25.5) | cm³/rev | Three standard displacement options for this pump frame size |
| Continuous Pressure | 350–400 | bar | Rated pressure range for stable continuous operation |
| Intermittent Pressure | 380–425 | bar | Permissible pressure range for short-term overload operation |
| Peak Pressure | 400–450 | bar | Maximum instantaneous pressure permitted for a few seconds |
| Maximum Continuous Speed | 2,100–2,300 | rpm | Safe continuous speed under self-priming conditions; smaller-displacement models allow higher speeds |
| Maximum Intermittent Speed | 2,500–2,700 | rpm | Mechanical speed limit during no-load operation or short-term acceleration |
Applications
Dump Trucks & Tippers: Powers heavy-duty hydraulic telescopic tipping cylinders.
Truck-Mounted Cranes & Loaders: Supplies steady, high-pressure flow for knuckle-boom cranes.
Refuse/Garbage Trucks: Drives high-force compaction and waste ejector systems.
Recovery Vehicles: Runs hydraulic winches and slide-bed mechanisms.
FOX DIN 5462 SE piston pumps 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.
DIN 5462: This indicates the standard mounting configuration. It features a universal 4-bolt square flange (80mm pilot diameter) and an 8-tooth splined shaft (8x32x36mm), allowing it to direct-mount onto modern commercial vehicle Power Take-Off (PTO) gearboxes globally.
SE (Suction-Extensional): This stands for "Enhanced Self-Priming". This version features a redesigned and optimized internal inlet fluid passage in the rear cover, ensuring superior oil suction performance even when the truck engine is running at low idling speeds, protecting the internal pistons from cavitation.
Yes, but it requires manual adjustment: Although the pump housing is bi-rotational, it is factory-set to a fixed single direction indicated by an arrow on the body. You must never run the pump against its set direction, or it will immediately lock up due to internal oil starvation.
The Procedure: To reverse it, you need to remove the mounting bolts of the rear port cover, rotate the cover 180 degrees relative to the main pump body to realign the internal timing slots with the alternative indexing pin/marking, and then re-torque the bolts to specification.
Inlet Cavitation: Piston pumps have very strict oil supply demands. If your suction hose diameter is restricted (less than 3/4" or 1"), if the inlet hose kinks, or if the oil reservoir’s breather cap is blocked, the pump pulls a vacuum. This creates vapor bubbles that collapse violently, creating a hammering sound.
High Oil Viscosity: Cold weather starts can thicken hydraulic oil, making it difficult for the pistons to draw fluid smoothly. Always let the vehicle idle for a few minutes to warm up the hydraulic oil before engaging the PTO under heavy loads.
Structural Load Limits: The entire FOX series shares the identical drive shaft, housing matrix, and internal bearings to maintain a compact footprint.
Piston Surface Area: Larger displacement models utilize wider piston diameters. Under extreme pressure, a larger piston surface area exerts significantly higher reactive axial and radial forces onto the internal swashplate and bearings. To protect the bearings from premature fatigue, the maximum pressure for the FOX 25 is restricted to 350 bar, while the FOX 16/21 can safely sustain 400 bar.
Gear Oil Leak: If the escaping fluid is thick, dark, and has a strong sulfur odor, the truck's transmission/PTO shaft seal is damaged, or the mounting gasket between the two faces has pinched.
Hydraulic Oil Leak: If the fluid is clear and lighter, the FOX pump's front shaft oil seal has failed. This is typically triggered by excessive case pressure (caused by a blocked return line or severe internal piston wear bypassing pressurized oil into the pump housing), or excessive axial play in the PTO shaft vibrating the pump shaft.
Yes, we support OEM and customization, including nameplate, packaging, and specific performance requirements. Send us your drawings or specifications for evaluation.
FOX DIN 5462 SE piston 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.
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.
