CBTZTD External Gear Pump
2 week ago
Product details
CBTZTD External Gear Pump
1. Product Overview
The CBTZTD series is a high-performance three-piece external hydraulic gear pump developed for mobile machinery hydraulic system. It adopts high-strength cast iron front and rear covers matched with precision nitrided gear pairs and lightweight alloy casing. Equipped with floating side plate axial compensation structure and DU self-lubricating sliding bearings, this hydraulic gear pump maintains high volumetric efficiency even under low-speed working conditions. The integrated design can be made as single pump or tandem dual pump version, widely used as main oil supply pump and steering pilot pump for compact loaders, sanitation sweepers, garbage trucks, agricultural harvesters and small engineering vehicles. With standard SAE diamond flange installation dimensions, it is fully interchangeable with original OEM pumps for direct replacement without pipeline modification .
Model Code Explanation
- CBTZ: High-pressure three-piece gear pump series
- TD: Reinforced structure with enhanced anti-wear performance, compatible with flange port connection
2. Main Technical Parameters
Item Specification
Pump Type External meshing three-piece hydraulic gear pump
Rated Working Pressure 20 MPa
Maximum Intermittent Peak Pressure 25 MPa
Rotational Speed Range 600 ~ 3000 rpm
Internal Structure Floating side plate automatic clearance compensation, DU bushing, radial hydraulic balance
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
Volumetric Efficiency ≥92%
Displacement options 20ml/r ~ 40ml/r optional
3. Working Principle
Driven by the input shaft, the meshing gear set rotates synchronously. Negative pressure is formed in the suction cavity, drawing hydraulic oil from the reservoir. Gear teeth convey pressurized fluid to the pressure outlet and supply stable flow to each branch of the hydraulic system. The floating side plates automatically compensate axial wear clearance caused by long-time operation, effectively reducing internal leakage and ensuring the hydraulic gear pump keeps high efficiency during continuous duty cycles . The DU sliding bearing reduces friction and extends service life under frequent load changes.
4. Core Advantages
1. Three-piece split structure, easy disassembly and on-site maintenance without special tools.
2. DU self-lubricating bearing design realizes stable efficiency even at low rotational speed.
3. Floating side plate structure minimizes internal leakage, pressure keeps stable after long working hours.
4. Optimized asymmetric gear tooth profile brings low noise and small flow pulsation.
5. Excellent anti-pollution capacity, perfectly adapted to dusty construction and farm working environments.
6. Standard flange and oil port layout, plug-and-play installation for aftermarket replacement.
7. Compact overall size, suitable for equipment with limited installation space.
5. Application Range
This hydraulic gear pump is widely applied in the hydraulic system of mini wheel loaders, road sweepers, waste compactors, harvesters, forklifts and small hydraulic power units, serving for main working circuit and steering auxiliary 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.
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Ningbo Hengnuo Hydraulic Drive Co.,Ltd
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