CBZTG3 External Gear Pump
1. Product Overview
CBZTG3 series is a heavy-duty high-pressure external hydraulic gear pump engineered for rigorous mobile machinery hydraulic system. Constructed with high tensile cast iron housing and enhanced gear sets, this hydraulic gear pump adopts reinforced G3 pressure grade design, featuring excellent pressure resistance, shock resistance and contamination tolerance. It runs stably under continuous heavy-load and frequent pressure fluctuation conditions. Widely used as main hydraulic power source for wheel loaders, compact excavators, municipal sanitation vehicles, agricultural harvesters and stationary hydraulic power units. With universal standard mounting dimensions, it can perfectly replace original OEM pumps for aftermarket maintenance.
Model Code Explanation
CBZTG3: CBZT heavy-duty gear pump series; G3 represents reinforced structure and grade 3 pressure specification with flange port configuration.
2. Main Technical Parameters
Item Specification
Pump Type External meshing hydraulic gear pump
Rated Working Pressure 21 MPa
Max Intermittent Peak Pressure 28 MPa
Rotational Speed Range 600 ~ 3200 rpm
Internal Structure Floating side plate automatic clearance compensation, full 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 -20℃ ~ +90℃
Mounting Form Standard diamond flange
Volumetric Efficiency ≥92%
3. Working Principle
The drive shaft drives a pair of meshing gears to rotate synchronously. Negative pressure is formed inside the suction chamber, drawing hydraulic oil from the reservoir. Gear teeth convey oil to the pressure outlet and deliver pressurized fluid to every branch of the hydraulic system. The floating side plates automatically compensate axial abrasion clearance under system pressure, greatly cutting down internal leakage and enabling the hydraulic gear pump to maintain high efficiency during long-term continuous operation.
4. Core Advantages
1. Thickened cast iron pump body with high rigidity, outstanding resistance to pressure impact and vibration.
2. Reinforced gear and side plate structure extends service life under heavy-duty working conditions.
3. Floating side plate design ensures low internal leakage and stable pressure output.
4. Superior anti-pollution performance, suitable for dusty construction and outdoor working sites.
5. Standard flange and oil port layout, plug-and-play installation without pipeline modification.
6. Low flow pulsation, smooth operation and low noise level.
5. Application Range
This hydraulic gear pump is widely equipped in hydraulic system of wheel loaders, compact construction equipment, road sweepers, garbage compactors, large forklifts and industrial hydraulic stations, serving as main pump and pilot pump.
6. Common Faults & Replacement Advice
Replace the whole pump assembly if these issues occur: insufficient system pressure, slow movement of hydraulic actuators, oil leakage on shaft seal and mating surface, abnormal metal grinding noise inside pump housing.
