CBQL-*5/F5 Dual External Gear Pump
2 week ago
Product details
CBQL-*5/F5 Dual External Gear Pump
1. Product Overview
CBQL-*5/F5 is a tandem unequal displacement dual external gear pump specially designed for mobile machinery hydraulic system. This integrated hydraulic gear pump adopts a combined structure, the front section is customizable 5 series cartridge, and the rear section is F5 pressure grade pump unit, assembled into one compact cast housing with a common input drive shaft.
The large displacement front pump provides high flow for main working circuits such as lifting and tilting actions, while the F5 rear pump supplies stable low-pressure oil flow for steering, pilot control and lubrication auxiliary loops of the hydraulic system. Integrated design replaces two separate single pumps, simplifies pipeline layout, saves installation space, widely used in forklifts, compact loaders, sanitation trucks and agricultural machinery, and can be fully interchanged with original OEM pumps.
Model Explanation
- CBQL: Series code of low-noise tandem dual gear pump with reinforced structure
- *5: Customizable displacement of front pump, 5 grade pressure specification
- F5: Rear pump with F-class pressure rating (rated pressure 20MPa), flange port connection form
2. Main Technical Parameters
Item Specification
Pump Type Tandem unequal displacement external hydraulic gear pump
Rated Pressure 20MPa for both pump sections
Maximum peak pressure 25MPa
Rotational speed range 600 ~ 3000 rpm
Internal structure Floating side plate automatic clearance compensation, radial hydraulic balance structure
Standard seals HNBR nitrile rubber; FKM high temperature resistant seals optional
Applicable hydraulic fluid ISO VG46, VG68 anti-wear hydraulic oil
Operating temperature -20℃ ~ +90℃
Mounting form Standard diamond flange installation
Volumetric efficiency ≥91%
3. Working Principle
Driven by the shared input shaft, two groups of external gear pairs rotate synchronously. Negative pressure is formed inside the suction cavity, drawing hydraulic oil from the oil tank. Two independent pump chambers deliver separated pressurized oil to different branches of the hydraulic system without cross internal leakage. The floating side plate automatically compensates the wear clearance on gear end faces under system pressure, reduces internal leakage effectively, and keeps the hydraulic gear pump maintaining high efficiency during long continuous operation.
4. Core Advantages
1. Unequal flow tandem design, perfectly matches main high-flow circuit and auxiliary low-flow pilot circuit, no extra flow distribution valve needed.
2. Reinforced pump body structure with good vibration resistance, suitable for bumpy construction working conditions.
3. Optimized gear tooth profile realizes low noise and small flow pulsation during operation.
4. Excellent anti-pollution performance, adapts to dusty harsh environment of construction and agricultural machines.
5. Standard flange and oil port layout, fully interchangeable with original pumps, plug and play without pipe modification.
6. Compact overall dimension reduces installation space greatly.
5. Application Range
This dual gear pump is widely applied in the hydraulic system of 3-7 ton forklifts, mini wheel loaders, road sweepers, garbage trucks and harvesters. It serves as the core power component to drive working mechanism and hydraulic steering system simultaneously.
6. Common Faults & Replacement Suggestion
Replace the whole pump assembly if these problems occur: insufficient lifting force, stiff steering, oil leakage on shaft seal and mating surface, abnormal grinding noise inside pump body, cross leakage between two pump sections.
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Ningbo Hengnuo Hydraulic Drive Co.,Ltd
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