CBF-*4 External Gear Pump
1. Product Overview
CBF-*4 external gear pump is a fixed displacement external meshing hydraulic gear pump, which acts as an essential power unit in the hydraulic system. It adopts mature floating axial clearance compensation structure to reduce internal leakage and maintain high volumetric efficiency under continuous working conditions.
The symbol * represents various optional displacement specifications. Multiple options are provided for mounting flange, drive shaft form, oil port direction and rotation direction. Featuring compact structure, stable flow output and outstanding cost performance, this hydraulic gear pump can be used as interchangeable spare parts for engineering machinery and general hydraulic equipment maintenance.
Model Code Explanation
- CBF: Series code of external meshing gear pump
- *: Displacement identification, different flow specifications optional
- 4: Structural specification code, determining installation dimensions and pressure grade
2. Main Technical Parameters
Item Specification
Pump Type Fixed displacement external meshing hydraulic gear pump
Rated Working Pressure 20 MPa
Maximum Peak Pressure 25 MPa
Operating Speed Range 600 ~ 2800 rpm
Volumetric Efficiency ≥92% under rated working condition
Housing Material High-strength cast aluminum alloy
Shaft Type Flat key shaft; spline shaft available as option
Oil Port Connection Thread connection
Applicable Hydraulic Oil ISO VG46 / VG68 anti-wear hydraulic oil
Operating Temperature -20℃ ~ +80℃
Standard Seals NBR; FKM high-temperature sealing parts optional
3. Working Principle
The driving shaft drives a pair of meshing gears to rotate. Vacuum is formed on the suction side to suck hydraulic oil into the pump chamber. The gears carry hydraulic oil to the pressure side and deliver pressurized oil into the hydraulic system.
The floating compensation plate automatically compensates axial clearance generated by friction wear, effectively restraining internal leakage and ensuring stable working performance during long-term operation.
4. Core Advantages
1. Axial automatic clearance compensation structure, low internal leakage and stable volumetric efficiency.
2. Lightweight aluminum alloy pump body, compact layout, convenient installation and maintenance.
3. Smooth operation, low vibration and low running noise.
4. Excellent anti-pollution capacity, suitable for various harsh working environments.
5. Complete specifications of displacement and installation forms to meet diverse matching requirements.
6. Economical aftermarket replacement solution for original gear pumps.
5. Application Range
As the power source of the hydraulic system, this hydraulic gear pump is widely applied to forklifts, small loaders, sanitation vehicles, hydraulic power units, light industry machinery and logistics transportation equipment.
6. Common Faults & Replacement Suggestion
Typical failures: Insufficient output flow, failure to reach rated pressure, oil leakage at shaft seal, abnormal operating noise.
Please check hydraulic oil cleanliness and filter element firstly. Replace the complete gear pump assembly when gears, shaft sleeves and compensation plates are severely worn.
