Product Overview
The CBKP Series are high-pressure external gear pumps manufactured by leading Chinese hydraulic companies including Hefei Changyuan Hydraulic (HCHC) . The series features high-strength aluminum alloy housings (with cast iron options for certain models) and incorporates advanced technologies including floating side plates, axial clearance automatic compensation, radial balance, and DU self-lubrication. These pumps deliver high volumetric efficiency, high pressure, low noise, strong vibration resistance, and long service life.
The CBKP Series supports single, tandem, and triple pump configurations, widely used in forklifts, loaders, excavators, cranes, road rollers, and other construction machinery, as well as mining, light industry, sanitation, and agricultural machinery.
This page features three CBKP Series multi-pump models:
CBKP100/50/40-BFP: Triple pump, displacements 100/50/40 mL/r, flange connections
CBKP80/80-BFP: Tandem pump, displacements 80/80 mL/r, flange connections
CBKP63/63/40-BF*L: Triple pump, displacements 63/63/40 mL/r, threaded connections
As original specification models within the CBKP line, these products enable direct form-fit-function interchangeability with original units—no modifications to piping or mounting interfaces required. Our replacement solutions strictly adhere to original technical standards and undergo 100% simulated in-service testing to ensure performance, reliability, and service life identical to OEM products.
Technical Specifications
Model 1: CBKP100/50/40-BFP (Triple Pump)
Applicable Model:
Model Code Breakdown (per CBKP Series naming convention):
CBKP — Product code: High-pressure gear pump series
100/50/40 — Nominal displacement: 100 mL/r / 50 mL/r / 40 mL/r
B — Mounting: Square flange
F — Port type: Flange connection
P — Shaft end: Plain key
This Model Detailed Specifications (compiled from multiple manufacturer sources):
Nominal Displacement: 100 mL/r / 50 mL/r / 40 mL/r
Rated Pressure: 25 MPa
Maximum Pressure: 31.5 MPa
Rated Speed: 1,500 r/min
Maximum Speed: 2,000 r/min
Rotation Direction: Clockwise / Counterclockwise (customizable)
Mounting Type: Flange mount
Port Connection: Flange connection
Fluid Compatibility: Anti-wear hydraulic oil, viscosity 10-100 cSt
Operating Temperature: -20℃ to 80℃
Main Materials: Housing: Cast Iron; Gears: Alloy Steel; Shaft: Alloy Steel
Theoretical Max Flow (@rated speed): 150/75/60 L/min
Model 2: CBKP80/80-BFP (Tandem Pump)
Applicable Model:
Model Code Breakdown (per CBKP Series naming convention):
CBKP — Product code: High-pressure gear pump series
80/80 — Nominal displacement: 80 mL/r / 80 mL/r
B — Mounting: Square flange
F — Port type: Flange connection
P — Shaft end: Plain key
This Model Detailed Specifications (compiled from multiple manufacturer sources):
Nominal Displacement: 80 mL/r / 80 mL/r
Rated Pressure: 20 – 25 MPa
Maximum Pressure: 25 – 31.5 MPa
Speed Range: 500 – 2,500 r/min
Rotation Direction: Clockwise (standard), customizable
Mounting Type: Square flange mount
Port Connection: Flange connection
Fluid Compatibility: Hydraulic Oil
Operating Temperature: 30℃ to 90℃
Main Materials: Cast Iron Housing
Weight: Approx. 26 kg (reference)
Model 3: CBKP63/63/40-BF*L (Triple Pump)
Applicable Model:
Model Code Breakdown (per CBKP Series naming convention):
CBKP — Product code: High-pressure gear pump series
63/63/40 — Nominal displacement: 63 mL/r / 63 mL/r / 40 mL/r
B — Mounting: Square flange
F — Port type: Flange connection
L — Shaft end ( = specific code, L = Left-hand/Counterclockwise)
This Model Detailed Specifications (compiled from multiple manufacturer sources):
Nominal Displacement: 63 mL/r / 63 mL/r / 40 mL/r
Rated Pressure: 20 – 25 MPa
Maximum Pressure: 25 – 31.5 MPa
Speed Range: 500 – 2,500 r/min
Rotation Direction: Left-hand (counterclockwise)
Mounting Type: Square flange mount
Port Connection: Flange or threaded (configuration dependent)
Fluid Compatibility: Hydraulic Oil
Operating Temperature: 30℃ to 90℃
Main Materials: Cast Iron Housing
Volumetric Efficiency: ≥ 90% (at rated conditions)
Weight: Approx. 32.7 kg (reference)
Key Technical Advantages
1. Multi-Pump Modular Design — One Shaft, Multiple Circuits, Simplified System Layout
The CBKP Series supports tandem and triple pump configurations, delivering multiple independent oil sources driven by a single shaft. This design significantly reduces the number of drive interfaces required and simplifies hydraulic piping layout, making it the ideal choice for complex multi-circuit hydraulic systems in construction machinery.
2. Axial Clearance Automatic Compensation — High Volumetric Efficiency
The CBKP Series features axial clearance automatic compensation with floating side plates, incorporating axial clearance floating compensation, radial balance, and DU self-lubrication technologies. This design ensures long-term high volumetric efficiency (≥ 90%).
3. High-Strength Materials with Precision Manufacturing — Long Service Life and High Reliability
CBKP Series housings are manufactured from high-strength aluminum alloy using liquid extrusion molding technology for superior load capacity. Gears are made from high-strength alloy steel with quenching treatment for excellent wear resistance. High-strength roller bearings enhance overload and contamination resistance.
4. High Pressure Capacity for Heavy-Duty Applications
The CBKP Series delivers rated operating pressures up to 25 MPa and maximum pressures up to 31.5 MPa. It provides exceptional pressure capacity in its class, capable of handling the hydraulic system requirements of various heavy construction machinery.
5. Flexible Configuration Options for Wide Adaptability
The CBKP Series offers multiple mounting types (diamond flange, square flange), port types (flange, threaded), shaft types (plain key, rectangular spline, SAE involute spline, metric involute spline), and rotation directions (clockwise/counterclockwise). Widely used in construction machinery, mining equipment, metallurgical equipment, and marine hydraulic systems requiring multi-circuit oil supply.
Application Areas
Construction Equipment: Excavators, loaders, cranes, road rollers hydraulic working systems
Forklifts: Multi-circuit hydraulic systems
Mining Equipment: Hydraulic power systems for mining machinery
Metallurgical Equipment: Hydraulic transmission systems
Marine Hydraulic Systems: Hydraulic power units for marine equipment
Specialty Vehicles: Sanitation vehicles, lifting vehicles
Expert Maintenance Tips
1. Installation Precautions
The CBKP Series are uni-directional rotation pumps—verify that the system’s required rotation direction matches the pump’s identification marking before installation. CBKP63/63/40-BF*L features left-hand rotation.
Ensure coaxial alignment between the pump and drive shaft to avoid radial forces.
Tighten mounting bolts evenly in a diagonal sequence.
Suction lines should be short and straight to ensure adequate suction. Suction vacuum should not exceed -0.03 MPa to prevent cavitation.
2. Fluid Management
Use anti-wear hydraulic oils conforming to ISO/DIN standards, viscosity range 10-100 cSt.
Install suction and pressure filters with filtration accuracy no less than 25 μm.
Operating temperature should be maintained within -20℃ to 80℃. Prolonged operation at excessive temperatures will accelerate seal aging and internal wear.
Fill the pump with clean hydraulic fluid before initial start-up. Never run the pump dry.
3. Start-Up & Commissioning
Use jog start method for initial start-up; verify correct rotation direction before continuous operation.
Run under no-load (low pressure) conditions for several minutes before gradually increasing to operating pressure.
Monitor noise, temperature, and system pressure for normal operation.
4. Routine Maintenance
CBKP gear pumps themselves are maintenance-free; however, regular maintenance of the entire hydraulic system is essential for trouble-free operation.
Regularly inspect for abnormal vibration, noise, and leakage.
If flow reduction, pressure drop, or abnormal noise occurs, stop immediately for inspection.
Regularly replace return line filters and suction strainers to prevent contaminant ingress.
