CBTL-*4/*4 Dual External Gear Pump

CBTL-4/4 Dual External Gear Pump

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

 4 year year

Product details

CBTL-*4/*4 Dual External Gear Pump

1. Product Overview

The CBTL-*4/*4 is a tandem equal-displacement dual external hydraulic gear pump built for mobile equipment hydraulic system. This integrated unit incorporates two identical 4-series gear cartridges inside a single alloy housing, sharing one common input shaft. Both pump sections feature the same pressure grade and displacement specification. It supplies two independent pressure oil circuits at the same time, which can be used for dual working circuits, steering and pilot control loops or dual lubrication lines in the hydraulic system. With compact integrated structure, it replaces two separate single pumps to simplify piping arrangement, widely used for forklifts, mini loaders, sanitation vehicles, agricultural machinery and stationary hydraulic power units, fully interchangeable with original OEM components.

Model Code Definition

- CBTL: Series code of compact tandem gear pump with low pulsation design

- *4/*4: Twin identical 4-grade pump cartridges, customizable displacement for both front and rear sections

2. Main Technical Parameters

Item Specification

Pump Type Tandem equal-displacement external meshing hydraulic gear pump

Rated Working Pressure 20 MPa

Intermittent Peak Pressure 25 MPa

Rotational Speed 600 ~ 3000 rpm

Internal Structure Floating side plate automatic clearance compensation, full radial balance

Standard Seals HNBR nitrile rubber; FKM high temperature seals optional

Suitable Fluid ISO VG46, VG68 anti-wear hydraulic oil

Operating Temperature -20℃ ~ +90℃

Mounting Standard diamond flange installation

Volumetric Efficiency ≥91%

3. Working Principle

The common drive shaft makes two sets of gear pairs rotate synchronously. Vacuum generates in the suction chamber and draws hydraulic oil from the reservoir. Two separate pumping chambers deliver pressurized oil to two independent branches of the hydraulic system with no cross leakage. The floating side plate design automatically compensates axial wear clearance caused by long-time operation, minimizing internal leakage and maintaining stable efficiency of the hydraulic gear pump.

4. Core Advantages

1. Equal flow twin pump design, consistent pressure output for two separate hydraulic circuits, easy system debugging.

2. Optimized gear profile ensures low noise and small flow pulsation during operation.

3. Floating side plate structure reduces efficiency attenuation after long hours of continuous work.

4. Good contamination resistance, suitable for dusty and rough construction sites.

5. Standard flange and port dimensions, direct plug-and-play replacement without modifying pipelines.

6. Compact integrated structure saves installation space and reduces overall weight.

5. Application Range

This dual gear pump is extensively used in the hydraulic system of industrial forklifts, compact wheel loaders, road sweepers, garbage trucks, harvesters and small hydraulic power stations, providing stable oil supply for dual working circuits or main and auxiliary control systems.

6. Failure & Replacement Advice

Replace the whole pump assembly when symptoms appear: insufficient system pressure, slow cylinder movement, oil leakage on shaft seal and split face, 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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