CBHLB-F5/F5 Dual External Gear Pump
2 week ago
Product details
CBHLB-F5/F5 Dual External Gear Pump
1. Product Overview
CBHLB-F5/F5 is a dual external meshing hydraulic gear pump developed for engineering machinery and industrial hydraulic systems. This tandem dual pump integrates two identical F5 pressure grade gear pump assemblies inside one cast housing, sharing a common input shaft. The F5/F5 designation indicates both front and rear pump sections adopt the same F-class pressure rating and flange port configuration. One pump section acts as the main oil supply for working circuits, while the other serves as auxiliary power for steering, clamping or lubrication loops in the hydraulic system. It is widely applied in forklifts, small loaders, sanitation vehicles and general industrial machinery, with fully interchangeable dimensions to match the original OEM pumps.
Model Explanation
- CBHLB: Product series code of high-performance dual gear pump
- F5: Pressure grade (rated pressure 20MPa), reinforced gear structure
- F5/F5: Both front and rear pump cartridges are identical specification with flange connections
2. Main Technical Parameters
Item Specification
Pump Type Dual tandem external hydraulic gear pump
Rated Pressure 20 MPa for both sections
Peak Pressure 25 MPa
Rotational Speed 600 ~ 3000 rpm
Displacement Multiple options available as customer requirement
Internal Structure Floating side plate automatic clearance compensation
Seals Standard HNBR seals; FKM high temperature seals optional
Working Fluid ISO VG46, VG68 anti-wear hydraulic oil
Operating Temperature -20℃ ~ +90℃
Mounting Standard diamond flange installation
3. Working Principle
Driven by a single input shaft, two groups of external meshing gears rotate synchronously. Vacuum is formed at the suction side, drawing oil from the hydraulic tank. The gears carry fluid to pressure outlets separately, providing two independent pressure oil sources. The floating side plates automatically compensate wear clearance during long running hours, minimizing internal leakage and maintaining stable volumetric efficiency of the hydraulic gear pump. Two separate oil outlets supply pressure oil to different branches of the hydraulic system simultaneously.
4. Product Advantages
1. Twin equal-pressure design, two pump units with same performance parameters, stable output for dual hydraulic circuits.
2. Floating side plate structure reduces internal leakage, suitable for continuous long-duty operation.
3. Compact integrated structure saves installation space compared with two separate single pumps.
4. Excellent contamination resistance, adapts to dusty working conditions of construction machinery.
5. Standard flange and port layout, direct replacement without modifying pipework.
6. Low pulsation and low noise operation.
5. Application Range
This dual gear pump is commonly used in the hydraulic system of internal combustion forklifts, mini wheel loaders, road sweepers, agricultural machinery and stationary hydraulic power packs, providing power for main lifting circuit and auxiliary steering circuit at the same time.
6. Common Faults & Replacement Suggestion
Replace the whole pump assembly when facing insufficient pressure, slow movement of actuators, oil leakage at shaft seal and split surface, abnormal grinding noise inside pump body.
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Ningbo Hengnuo Hydraulic Drive Co.,Ltd
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4 year
Main Product:
hydraulic motor,
gear box,
hydraulic pump,
hydraulic valve ,
hydraulic winch ,
hydraulic system