CBWL-*3/*3 Dual External Meshing Gear Oil Pump

CBWL-3/3 Dual External Meshing Gear Oil Pump

2 week ago

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

 4 year year

Product details

CBWL-*3/*3 Dual External Meshing Gear Oil Pump

1. Product Overview

CBWL-*3/*3 is a compact tandem equal-displacement hydraulic gear pump, specially developed for light-duty mobile machinery and small hydraulic power units. This integrated pump assembly adopts monolithic aluminum alloy housing, fitted with two identical size 3 series gear pump cartridges sharing one input shaft. The mark *3/*3 means both front and rear pump sections are completely same in displacement and pressure grade. It can output two separate pressure oil flows simultaneously for dual independent loops in the hydraulic system, such as dual clamping circuits, double lubrication lines, or matched main and pilot control circuits. Comparing with two individual single pumps, this integrated structure greatly simplifies tubing layout and reduces overall installation space. It is widely applied on small forklifts, miniature loaders, sanitation equipment, agricultural machinery and stationary hydraulic stations, and can be used as direct aftermarket replacement for original parts.

Model Code Explanation

- CBWL: Compact low-noise tandem gear pump series

- *3/*3: Twin identical size 3 pump groups, displacement can be customized as required

2. Main Technical Parameters

Item Specification

Pump Type Tandem equal-displacement external meshing hydraulic gear pump

Rated Pressure 20 MPa

Max Peak Pressure 25 MPa

Rated Rotation Speed 600 ~ 3200 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 Oil ISO VG46, VG68 anti-wear hydraulic fluid

Working Temperature Range -20℃ ~ +90℃

Mounting Type Standard diamond flange

Volumetric Efficiency ≥90%

3. Working Principle

Driven by the common input shaft, two groups of external gear pairs rotate synchronously. Negative pressure forms in the suction chamber and draws hydraulic oil from the tank. Two independent pumping chambers deliver pressurized oil to two separated branches of the hydraulic system without cross leakage between the two pump sections. The floating side plates automatically compensate the abrasion clearance on gear end faces under system pressure, effectively reducing internal leakage and keeping the hydraulic gear pump with stable efficiency during long continuous operation.

4. Core Advantages

1. Equal displacement twin pump design, two circuits have consistent pressure and flow output, easy system adjustment and matching.

2. Lightweight die-cast aluminum housing features small volume and light weight, ideal for compact equipment arrangement.

3. Optimized gear tooth profile realizes low noise and low flow pulsation during operation.

4. Good contamination resistance, suitable for outdoor dusty working conditions of construction and farm machinery.

5. Standard flange and oil port dimensions, fully interchangeable with original pumps, plug-and-play installation without pipe modification.

6. Integrated common inlet design reduces pipeline connections and assembly cost.

5. Application Range

This dual gear pump is widely used in the hydraulic system of small electric and internal combustion forklifts, mini wheel loaders, road sweepers, lawn maintenance machinery, harvesters and small hydraulic power packs, providing stable oil supply for dual hydraulic circuits.

6. Common Faults & Replacement Suggestion

Replace the complete pump assembly if these faults occur: insufficient system pressure, slow actuator movement, oil leakage at shaft seal and joint surface, abnormal grinding noise inside pump body, cross leakage between two pump sections.

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

 Audited supplier

4 year

Address: Ningbo, China

Main Product: hydraulic motor, gear box , hydraulic pump, hydraulic valve , hydraulic winch, hydraulic system

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