Product Overview
The CBT-F304, CBT-F306, CBT-F310, CBT-F314, and CBT-F316 are representative models of the CBT series medium-to-high pressure external gear pumps. The CBT series gear pumps are reinforced high-pressure gear oil pumps specifically developed for demanding applications.
Featuring high-precision gears, reinforced aluminum alloy housing, double-layer floating bushings, and DU bushings. The bushings incorporate double fixing pins to prevent internal leakage caused by gear scraping under instantaneous high pressure. This precision-engineered combination delivers compact structure with excellent sealing, smooth operation, high efficiency, low noise, reliable performance, and sustained high efficiency over extended service life.
The CBT series gear pumps are widely used in hydraulic systems for agricultural machinery, construction machinery, lifting and transport equipment, mining machinery, and industrial vehicles. Engineered as a direct OEM-replacement solution for CBT series original products, these models fully comply with CBT series original design standards and mounting interface specifications, offering 100% direct interchangeability with OEM pumps. Every unit undergoes 100% workload simulation testing prior to shipment, rigorously validating pressure retention, volumetric efficiency, and internal leakage performance to meet or exceed OEM standards.
Model Code Breakdown (Bulleted List) :
CBT — Series: CBT Series Gear Pump
F — Pressure rating: F = 20MPa rated pressure
3 — Gear modulus: m=3
304 / 306 / 310 / 314 / 316 — Displacement code: 4 / 6 / 10 / 14 / 16 ml/r nominal displacement
Technical Specifications
CBT Series General Specifications
Series: CBT Medium-to-High Pressure External Gear Pump
Pressure Rating: F = 20MPa rated (approx. 200 bar)
Gear Modulus: m=3
Rated Speed: 2000 r/min
Maximum Speed: 3000 r/min
Minimum Speed: 600 r/min
Volumetric Efficiency: ≥ 85% – 93% (depending on displacement)
Housing Material: High-strength aluminum alloy
Bearing Type: Double-layer floating bushings / DU bushings
Mounting Type: Flange connection (F-type)
Shaft Type: Plain key / Spline / Flat end / Tapered (optional)
Rotation Direction: Clockwise / Counter-clockwise (optional)
Port Type: Flange connection
CBT-F304 Specifications
Model: CBT-F304
Nominal Displacement: 4 ml/r
Rated Pressure: 20 MPa (approx. 200 bar)
Peak Pressure: 25 MPa (approx. 250 bar)
Rated Speed: 2000 r/min
Maximum Speed: 3000 r/min
Minimum Speed: 600 r/min
Volumetric Efficiency: ≥ 85%
Input Power: 2.65 kW
CBT-F306 Specifications
Model: CBT-F306
Nominal Displacement: 6 ml/r
Rated Pressure: 20 MPa (approx. 200 bar)
Peak Pressure: 25 MPa (approx. 250 bar)
Rated Speed: 2000 r/min
Maximum Speed: 3000 r/min
Minimum Speed: 600 r/min
Volumetric Efficiency: ≥ 85%
Dimension A: 47 mm
Dimension B: 103 mm
CBT-F310 Specifications
Model: CBT-F310
Nominal Displacement: 10 ml/r
Rated Pressure: 20 MPa (approx. 200 bar)
Peak Pressure: 25 MPa (approx. 250 bar)
Rated Speed: 2000 r/min
Maximum Speed: 3000 r/min
Minimum Speed: 600 r/min
Volumetric Efficiency: ≥ 85%
Dimension A: 50 mm
Dimension B: 109 mm
CBT-F314 Specifications
Model: CBT-F314
Nominal Displacement: 14 ml/r
Rated Pressure: 20 MPa (approx. 200 bar)
Peak Pressure: 25 MPa (approx. 250 bar)
Rated Speed: 2000 r/min
Maximum Speed: 3000 r/min
Minimum Speed: 600 r/min
Volumetric Efficiency: ≥ 85%
Dimension A: 53 mm
Dimension B: 115 mm
CBT-F316 Specifications
Model: CBT-F316
Nominal Displacement: 16 ml/r
Rated Pressure: 20 MPa (approx. 200 bar)
Peak Pressure: 25 MPa (approx. 250 bar)
Rated Speed: 2000 r/min
Maximum Speed: 3000 r/min
Minimum Speed: 600 r/min
Volumetric Efficiency: ≥ 85%
Dimension A: 54.5 mm
Dimension B: 118 mm
Key Technical Advantages
1. High-Precision Gears with Reinforced Aluminum Housing
The CBT series features high-precision gears and reinforced aluminum alloy housing. The aluminum housing provides excellent heat dissipation, reducing operating temperatures. The shaft diameter reaches 18mm, enhancing torque transmission capacity.
2. Double-Layer Floating Bushings & DU Bushings – Long Life & High Reliability
The double-layer floating bushings and DU bushings design incorporates double fixing pins to prevent internal leakage caused by gear scraping under instantaneous high pressure. This design effectively reduces friction and wear, significantly extending pump service life.
3. F-Rated High-Pressure Capability – 20MPa Rated Pressure
The CBT series features F pressure rating with 20MPa (approx. 200 bar) rated pressure and 25MPa (approx. 250 bar) peak pressure. Compared to E-rated (16MPa) products, the F series delivers higher pressure capacity for medium-to-high pressure hydraulic applications.
4. High Efficiency & Low-Noise Operation
Precision-engineered construction enables the CBT series to maintain high volumetric and mechanical efficiency. Volumetric efficiency reaches 85% – 93%. The aluminum body with high-precision molding design ensures low-noise operation. The pump delivers high efficiency, low noise, and stable operation.
5. Wide Displacement Coverage & Flexible Configuration Options
The CBT series offers multiple displacement options from 4 ml/r to 25 ml/r (304 / 306 / 308 / 310 / 312 / 314 / 316 / 320 / 325). CBT-F304, CBT-F306, CBT-F310, CBT-F314, and CBT-F316 cover the typical range from small to large displacements. Multiple shaft types (plain key, spline, flat end, tapered) and rotation directions (clockwise/counter-clockwise) are available.
6. 100% Factory Tested & Direct Interchangeability
Every unit undergoes 100% workload simulation testing prior to shipment, covering pressure retention verification, internal leakage detection, and flow validation. Fully compliant with CBT series original design standards, with flange dimensions, shaft specifications, and mounting interfaces identical to OEM pumps—direct drop-in replacement with zero modifications required.
Application Areas
The CBT series gear pumps are widely used in the hydraulic systems of the following equipment:
Agricultural Machinery: Tractors, combine harvesters, sprayers, and agricultural equipment
Construction Machinery: Loaders, excavators
Lifting & Transport Machinery: Cranes, lift platforms
Mining Machinery: Mining equipment hydraulic systems
Industrial Vehicles: Forklifts and handling machinery
Textile Machinery and Building Machinery
Expert Maintenance Tips
1. Model Confirmation
CBT-F304 offers 4 ml/r, CBT-F306 offers 6 ml/r, CBT-F310 offers 10 ml/r, CBT-F314 offers 14 ml/r, and CBT-F316 offers 16 ml/r. Before installation, confirm the correct displacement based on system flow requirements and verify the complete model code on the pump nameplate. Distinguish between E-rated (16MPa) and F-rated (20MPa) products.
2. Rotation Direction Confirmation
The CBT series supports both clockwise and counter-clockwise rotation directions. Before installation, always verify that the PTO rotation direction of the host machine matches the pump’s rotation direction—incorrect rotation will result in pump failure to prime and may cause severe damage to gears and bearings within a short period.
3. Installation Precautions
Thoroughly clean the mounting flange and shaft mating surfaces before installation to ensure no debris remains
Mounting type is flange connection (F-type)
The inlet pipe diameter must not be smaller or larger than the pump’s inlet diameter; the inlet line should be as short as possible with minimal bends
The outlet pipe diameter must not be less than 3/4 of the inlet pipe diameter
Clean the inside of the piping with high-pressure oil before installation to prevent hard particles from entering
Install a filter on the inlet line with flow capacity exceeding the pump’s flow rate
4. First Start-Up and Bleeding
Before first start-up, must fill the pump with hydraulic oil through the inlet port—never start dry
After start-up, run at low speed with no load for 2–3 minutes to ensure complete air evacuation from the system
Check for abnormal noise or leakage—aluminum housing pumps are particularly sensitive to cavitation
5. Fluid and Filtration
Use high-quality anti-wear hydraulic oil compliant with standards
Maintain system oil cleanliness to ISO 4406 18/15 or better
Maintain operating temperature within recommended range
Regularly replace return line filters to prevent contaminants from entering the pump
6. Periodic Maintenance
Check mounting bolt torque every 1,000 operating hours
Regularly monitor system operating pressure—CBT-F series not to exceed 20MPa rated pressure (25MPa peak)
Regularly inspect shaft seals to prevent leakage
If flow output decreases, noise levels increase abnormally, or system temperature rises excessively, inspect and replace worn components promptly
