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4-Holes-ISO-hydraulic-piston-pumps
cissoko
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The 4-Hole ISO Hydraulic Piston Pump is a high-performance, fixed-displacement axial or bent-axis piston pump designed for demanding mobile hydraulic applications. It is engineered to mount directly onto a truck's Power Take-Off (PTO) unit using the globally recognized ISO 7653 mounting standard.
Extreme Pressure Ratings: Capable of handling massive continuous working pressures ranging from 350 to 400 bar (up to 450 bar peak), making it ideal for compact spaces requiring high power density.
High Volumetric Efficiency: Precision-engineered tolerances minimize internal oil slippage, maintaining exceptional flow output even under peak loads and high temperatures.
Configurable Rotation: Most models are built as "bi-rotational" from the factory. The internal rotation direction (Clockwise or Counter-Clockwise) can be altered before installation by rotating the rear port cover 180 degrees.
Excellent Self-Priming: The piston mechanism creates a strong vacuum, allowing the pump to pull hydraulic fluid efficiently even when the truck engine is idling.
| Parameter | Standard Specification | Unit | Remarks |
|---|---|---|---|
| Pump Type | Bent-Axis / Axial Piston Pump | — | Fixed displacement, industry benchmark for heavy-duty high-pressure applications |
| Flange Standard | ISO 7653 Standard (4-Bolt Square Flange) | — | 4-hole square flange, pilot diameter typically 80 mm |
| Drive Shaft Type | 8 × 32 × 36 Rectangular Spline (8-Spline) | — | Standard ISO 8-spline drive shaft with extreme high torque load capacity |
| Displacement Range | 20 ~ 130 (Common sizes: 40, 60, 80, 108, 130) | cm³/rev | Theoretical oil output per revolution |
| Continuous Pressure | 350 ~ 400 | bar | Core working pressure, far exceeding standard truck gear pumps |
| Peak Pressure | 400 ~ 450 | bar | Allowable instantaneous peak pressure (e.g., moment of truck lifting) |
| Max Continuous Speed | 1500 ~ 2300 | rpm | Varies with displacement; larger displacement corresponds to lower max speed |
| Max Intermittent Speed | 1900 ~ 2700 | rpm | Safe upper speed limit under no-load or engine throttle 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.
4 Holes ISO hydraulic 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.
The ISO Specification: The ISO standard (specifically ISO 7653) features a 4-bolt square mounting flange (typically an 80mm square bolt pattern with an 80mm pilot diameter) and an 8x32x36mm splined male shaft.
Wider Adoption: It is the global benchmark for modern commercial vehicles and truck Power Take-Offs (PTOs).
Non-Interchangeable: It cannot be direct-mounted onto older 3-hole UNI gearboxes without a mechanical ISO-to-UNI conversion adapter plate.
Direction Specific: Unlike some gear pumps, axial piston pumps are highly directional. Running them backward will starve the internal cylinder block and cause immediate mechanical failure.
Direction Identification: Many modern ISO pumps are built as "bi-rotational" from the factory, meaning they can be configured for either Clockwise (CW) or Counter-Clockwise (CCW) rotation before installation.
The Adjustment: To switch the rotation, you must loosen the rear port backing cover, rotate it 180 degrees to align the internal timing/drain passages with the appropriate alignment mark, and torque the bolts back down.
Inlet Cavitation: Piston pumps move a large volume of oil very quickly. If the suction hose diameter is restricted, or the reservoir breather cap is clogged, the pump pulls a vacuum, creating microscopic air bubbles that violently collapse inside.
Cold Oil Restrictions: Thick, cold hydraulic fluid creates massive resistance in the suction line. Always allow the vehicle to idle and warm up the hydraulic oil before engaging the PTO at high speeds.
Loose Suction Clamps: Air can be sucked past loose hose clamps on the intake line, aerating the oil without showing a visible external oil leak.
Severe Pressure Drop When Hot: The pump operates perfectly when the truck is started cold, but as the oil heats up and thins, the truck loses its lifting power because the oil slips past the worn piston clearances.
Extremely Hot Pump Housing: If internal leakage (bypass) is high, the friction of the pressurized oil recycling inside the pump body generates massive heat, making the pump casing much hotter than the reservoir tank.
Fine Metal Shavings: Inspecting the hydraulic return-line filter reveals bright silver metal shavings or gray metallic paste, confirming severe friction wear between the piston shoes and the swashplate.
Shaft Seal Failure: High-pressure internal case pressure has blown out the pump’s front shaft oil seal. The leaked hydraulic oil escapes through the split line or the designated drainage weep hole.
High Case Pressure: This failure is often caused by a kinked, blocked, or missing case drain line (if equipped), or excessive internal pump wear that overpressurizes the pump housing.
PTO Gasket Leaks: Alternatively, the leak could be gear oil from the truck's transmission escaping because the mounting O-ring or paper gasket on the PTO face was pinched during installation.
Yes, we support OEM and customization, including nameplate, packaging, and specific performance requirements. Send us your drawings or specifications for evaluation.
4 Holes ISO hydraulic 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.
