CBTZTA-F External Gear Pump

CBTZTA-F External Gear Pump

 

1. Product Overview

 

The CBTZTA-F series is a premium high-pressure external hydraulic gear pump originally designed by HCHC Changyuan Hydraulic, specially engineered for mobile construction machinery hydraulic system. This hydraulic gear pump adopts high-strength lightweight aluminum alloy housing, paired with nitrided precision gear sets, DU self-lubricating sliding bearings and floating side plate automatic clearance compensation structure. The suffix "F" stands for flange port connection configuration, with A representing standard diamond flange mounting form. This unit features high volumetric efficiency even at low rotational speeds, low noise and excellent anti-vibration performance, perfectly suited for frequent start-stop and variable load working conditions. It is widely used as main supply pump and steering pilot pump for forklifts, compact loaders, road sweepers, garbage trucks, agricultural tractors and small hydraulic power units. With standardized installation dimensions, it can be directly interchanged with original OEM pumps without pipeline modification.

 

Model Code Explanation

 

- CBTZTA: High precision three-piece gear pump series

- F: Pressure grade (rated 20MPa) and flange oil port connection type

 

2. Main Technical Parameters

 

Item Specification 

Pump Type External meshing hydraulic gear pump (3-piece construction) 

Rated Working Pressure 20 MPa 

Maximum Intermittent Peak Pressure 25 MPa 

Rotational Speed Range 800 ~ 3000 rpm 

Internal Structure Floating side plate axial compensation, radial hydraulic balance, DU bushing 

Standard Seals HNBR nitrile rubber; FKM high temperature resistant seals optional 

Applicable Hydraulic Fluid ISO VG46, VG68 anti-wear hydraulic oil 

Operating Temperature Range -20℃ ~ +90℃ 

Mounting Form Standard diamond flange (Type A) 

Oil Port Type Flange connection (marked F) 

Volumetric Efficiency ≥92% 

Displacement options 8,12.5,16,20,23,25,30,40 ml/r optional 

Shaft options Key shaft, spline shaft available 

 

3. Working Principle

 

Driven by the input shaft, a pair of external meshing gears rotates synchronously. Negative pressure is generated inside the suction chamber, drawing hydraulic oil from the reservoir. Gear teeth transport pressurized fluid to the pressure outlet and deliver stable flow to all branches of the hydraulic system. The floating side plates automatically compensate axial wear clearance caused by long-term operation, effectively reducing internal leakage and maintaining high efficiency of the hydraulic gear pump even under low-speed working conditions. The DU self-lubricating bearings reduce friction loss and extend service life greatly.

 

4. Core Advantages

 

1. Lightweight high-rigidity aluminum alloy body, small overall size for limited installation space.

2. Patented floating side plate plus DU bearing design, keeps high efficiency at low rotating speed.

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

4. Excellent contamination resistance, adapts well to dusty outdoor construction and farm sites.

5. Flange type oil port design improves connection rigidity and reduces external leakage risk.

6. Three-piece split structure enables easy disassembly and convenient field maintenance.

7. Standard flange dimensions, plug-and-play replacement for aftermarket repair.

 

5. Application Range

 

This hydraulic gear pump is widely equipped in hydraulic system of industrial forklifts, mini wheel loaders, sanitation sweepers, waste compactors, agricultural tractors and small hydraulic power packs, serving for main working circuit and steering pilot circuit oil supply.

 

6. Common Faults & Replacement Suggestion

 

Replace the complete pump assembly if these problems occur: insufficient system pressure, slow cylinder movement, oil leakage at shaft seal and mating surface, abnormal grinding noise inside pump body, obvious temperature rise caused by internal leakage.