Shijiazhuang Laiye Import& Export Trading Co., Ltd. is one of the leading manufacturers and suppliers of 3cbl-fc triple gear pump in China, also supports customized service. If you're going to wholesale high quality 3cbl-fc triple gear pump made in China, welcome to get pricelist from our factory.
Products Description
Three pumping chambers on one shaft
If you take the end cover off a 3CBL-FC, you'll see three separate gear sets stacked along one central shaft. Each set has its own housing section and its own set of ports. This design was not chosen for simplicity; it was chosen to solve a specific space problem on large cranes and mining equipment. Instead of having three pumps with three separate drives, you get one compact assembly that fits in a single mounting footprint. It reduces the number of rotating parts the engine has to turn.
The flow paths remain separated
When you route the hydraulic lines, you'll find three independent suction ports and three independent discharge ports on the side of the body. This separation is intentional. In some multi-stage pumps, the internal passages are connected, which can cause pressure drops if one circuit is running harder than the others. On this pump, the fluid paths do not intersect. The front stage, middle stage, and rear stage all draw from the tank individually and discharge individually.
What we did to handle the longer body
A three-stage pump is physically longer than a single pump. The longer shaft has a natural tendency to bend when high torque is applied. We added a radial balance channel along the body to reduce the side load on the bearings. We also used axial clearance floating offset on all three stages, which allows the internal bushings to self-adjust as the components wear down over time. These two features are intended to keep the internal clearances stable and the shaft running true.
Pump Design
Eliminate external stack-ups
In the past, running three separate circuits meant bolting three pumps together with intermediate adapters. That setup is long, heavy, and prone to alignment problems. The 3CBL-FC removes those adapters. It takes a single rotating input and delivers three isolated pressure lines. This reduces the assembly time on the production line and reduces the total weight on the engine bell housing.
Match the flow rate to the workload
You will not always need the same flow from all three circuits. A crane's main hoist needs more flow than its pilot controls. The series allows you to pick different displacements for the front, middle, and rear stages. For example, 50/40/32 gives you a high-flow stage for the winch, a medium flow for the swing motor, and a lower flow for the pilot circuit.
Three pilot sizes to match the mounting flange
The pilot diameter is the locating ring that centers the pump. We made this series with three standard pilot diameters: Φ85, Φ90, and Φ100. During installation, you simply choose the pilot that matches the flywheel housing on the engine. This prevents the pump from sitting off-center and vibrating.
No cross-port interference
When you are running a crane and trying to hoist and swing at the same time, the last thing you want is one circuit robbing pressure from the other. Because the internal passages are physically isolated, each circuit operates independently. The pressure in the front stage will not drop when the middle stage is under load.
Specifications
| Model Combination (Front/Mid/Rear) | Displacement (mL/r) | Rated Pressure (MPa) | Max Pressure (MPa) | Rated Speed (r/min) | Max Speed (r/min) | Vol. Efficiency (%) | L (mm) | L1 (mm) | L2 (mm) | Weight (Kg) |
|---|---|---|---|---|---|---|---|---|---|---|
| 3CBL-FC-32/32/32 | 32 / 32 / 32 | 20 | 25 | 2000 | 2500 | 90 | 104.5 | 188 | 275 | 21 |
| 3CBL-FC-40/32/32 | 40 / 32 / 32 | 20 | 25 | 2000 | 2500 | 90 | 110.5 | 194 | 281 | 21.5 |
| 3CBL-FC-40/40/32 | 40 / 40 / 32 | 20 | 25 | 2000 | 2500 | 90 | 110.5 | 200 | 287 | 22 |
| 3CBL-FC-40/40/40 | 40 / 40 / 40 | 20 | 25 | 2000 | 2500 | 90 | 110.5 | 200 | 293 | 22.3 |
| 3CBL-FC-50/32/32 | 50 / 32 / 32 | 20 | 25 | 2000 | 2500 | 90 | 6.7 | 200 | 287 | 22 |
| 3CBL-FC-50/40/32 | 50 / 40 / 32 | 20 | 25 | 2000 | 2500 | 90 | 6.7 | 206 | 293 | 22.3 |
| 3CBL-FC-50/40/40 | 50 / 40 / 40 | 20 | 25 | 2000 | 2500 | 90 | 6.7 | 206 | 299 | 22.6 |
| 3CBL-FC-50/50/32 | 50 / 50 / 32 | 20 | 25 | 2000 | 2500 | 90 | 6.7 | 210 | 299 | 22.7 |
| 3CBL-FC-50/50/40 | 50 / 50 / 40 | 20 | 25 | 2000 | 2500 | 90 | 6.7 | 210 | 305 | 23 |
Operating Environment:
Hydraulic Oil: 20 - 43 cSt (Mineral hydraulic oil, ISO VG 32/46).
Working Temp.: -20°C to 80°C.
Filtration Accuracy: ≤ 25 μm.
Volumetric Efficiency: ≥ 90%.
Dimensional & Interface Options:
Ports:
3 Inlet Ports: M33X2-6H (Threaded).
3 Outlet Ports: M27X2 (Threaded).
Pilot / Mounting Diameter Options: Φ85, Φ90, Φ100.
Mounting Type: Oval or Square Flange (based on model code).
Shaft Options: Φ20 Plain Key (6h9), Φ25 Plain Key (8f9), Rectangular Spline.
Overall Dimensions: The three key lengths-L, L1, and L2-vary based on the displacement combination, as shown in the table above.
Common Installation Points
We see the 3CBL-FC triple gear pump used in three main types of equipment. On mobile cranes, it is typically mounted to the engine flywheel housing. The front stage drives the hoist drum, the middle stage runs the swing motor, and the rear stage extends the boom cylinder. The independent pressure lines allow the operator to hoist and rotate the crane simultaneously without any lag in response.
On large wheel loaders used in mining, this pump often supplies the steering system, the bucket lift arms, and a separate auxiliary circuit for cooling fans. The aluminum body keeps the weight down, which helps balance the loader.
For marine equipment, such as mooring winches and anchor windlasses, the three-stage design allows the operator to control three different line speeds from a single power unit. This simplifies the control arrangement on the vessel.
Select Right Combination
High-flow priority (e.g., 50/40/32): Choose this configuration when one circuit requires much more flow than the others. Typically, the front stage handles the main lifting circuit, the middle stage handles the swing, and the rear handles low-flow pilot functions.
Balanced circuits (e.g., 40/40/40 or 50/50/40): Choose this when all three circuits require similar flow rates, such as driving three hydraulic motors of comparable size.
Length consideration: As you increase the displacement of the front or middle stage, the overall length L2 increases. If your engine compartment has limited clearance, select a smaller displacement combination to avoid fitment issues.
Pump Production
Decades of Hydraulic Specialization
Since 1988, our engineering team has dedicated over 35 years solely to the hydraulic pump and valve sector. Our production processes and quality control criteria are specifically tailored to meet the rigorous demands of fluid power systems.
Integrated Production Capabilities
We operate a vertically integrated facility with over 200 technicians, encompassing CNC machining, gear hobbing, automated assembly, and a dedicated hydraulic testing lab. This integration allows us to control the quality of every aluminum casting and precision-cut gear tooth across all three pump stages.
Industry-Standard Quality Control (QC)
To ensure our triple pumps perform reliably under heavy loads, we enforce a three-tier pre-shipment QC protocol:
Metallurgical Check: Incoming aluminum and steel batches are tested for hardness and composition.
Dimensional Verification: Critical dimensions for all three independent stages are verified to maintain correct alignment.
Dynamic Performance Test: Every 3CBL-FC triple gear pump is run on a hydraulic test bench to validate the volumetric efficiency of all three stages and ensure zero external leaks.
Global OEM Support & Service
We offer OEM customization, including specific displacement combinations and shaft selections. Our packaging complies with ISPM 15 standards to ensure safe overseas transit, backed by a 12-month warranty against manufacturing defects.
FAQ
Q: Can all three stages of this pump run at maximum pressure simultaneously?
A: Yes, the internal structure is designed so that all three stages can sustain the rated 20 MPa pressure at the same time. However, it's important to note that running all three circuits at full load will draw the maximum input power from your engine. We recommend checking your engine's available horsepower at the pump drive to ensure it can handle the combined load without stalling at low RPM.
Q: If the machine only uses two of the three stages, does the third stage create drag?
A: Even if the third outlet is capped or bypassed back to the tank, the gears in that stage still rotate mechanically because they are mounted on the common drive shaft. This does create some rotational drag and generates slight heat. It's typically acceptable for intermittent use, but if you plan to permanently run the pump with one stage unused, we recommend installing a bypass line to circulate oil through that stage to carry away the heat.
Q: How long is the longest pump in this series?
A: The maximum length (L2) is 305 mm, found on the 3CBL-FC-50/50/40 model. The total length varies depending on the displacement combinations of the front, middle, and rear stages. We recommend leaving at least 20-30 mm of clearance behind the rear end cover for access during assembly.
Q: Can the front and rear pump stages have different displacements?
A: Yes. One of the key advantages of this series is its mixed-displacement capability. The front and rear stages can be configured with different displacements to match different hydraulic requirements, such as high-flow lifting functions combined with lower-flow steering or auxiliary circuits.
Q: How do I select the correct displacement combination for my machine?
A: The selection mainly depends on the flow requirements of each hydraulic function. The larger front stage is usually matched to high-demand functions such as cylinders or loaders, while the rear stage is selected according to auxiliary needs such as steering or control circuits.
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