The GFB303 Hydraulic Planetary Gearbox is a compact hydraulic reduction gearbox designed for high-torque power transmission in mobile and industrial machinery. It combines planetary reduction, multiple ratio configurations and hydraulic motor options for different machine requirements.
The listed GFB303 configuration provides 2,500 Nm rated output torque and up to 4,000 Nm maximum output torque. The gearbox is available with single-stage, two-stage and three-stage reduction options.
| Parameter | GFB303 |
|---|---|
| Rated Output Torque | 2,500 Nm |
| Maximum Output Torque | 4,000 Nm |
| Example Ratio | 24.5 |
| Displacement | 2,838 ml/r |
| Working Pressure | 12.5 MPa |
| Speed Range | 0.5–20 r/min |
| Brake Release Pressure | 2.5–3 MPa |
| Maximum Brake Torque | 450 Nm |
| Weight | 92 kg |
The GFB303 provides 2,500 Nm rated output torque and 4,000 Nm maximum output torque for hydraulic power transmission applications requiring compact torque multiplication.
The GFB303 is available with single-stage, two-stage and three-stage reduction configurations. Different ratios can be selected according to the required output speed and torque.
The listed hydraulic motor options include:
OMP
OMS
A2FM32
A2FM45
A2FM56
A2FM63
The GFB303 is specified with a maximum brake torque of 450 Nm and a brake release pressure of 2.5–3 MPa.
With a listed weight of 92 kg, the GFB303 provides a compact gearbox configuration for equipment where installation space and hydraulic transmission requirements need to be considered together.
Industrial power transmission systems
Material handling equipment
Construction machinery
Agricultural machinery
Mobile hydraulic equipment
Other compact high-torque drive applications
| Model | Rated Output Torque (Nm) | Maximum Output Torque (Nm) | Single-Stage Ratio | Two-Stage Ratio | Three-Stage Ratio | Hydraulic Motor | Max. Brake Torque (Nm) |
|---|---|---|---|---|---|---|---|
| GFB303 | 2,500 | 4,000 | 4.3 / 5.3 | 15.3 / 18.1 / 24.5 / 38.4 | 63.1 / 77.2 / 105 / 178 | OMP / OMS / A2FM32 / A2FM45 / A2FM56 / A2FM63 | 450 |
The GFB303 supports several reduction configurations. For example, the listed ratio of 24.5 is included in the two-stage ratio range. The appropriate ratio should be selected according to the hydraulic motor displacement, target output speed and required torque.
Before ordering, customers should confirm the hydraulic motor interface, required ratio, brake configuration, installation dimensions and operating conditions.
The GFB303 can be evaluated for replacement applications involving compatible hydraulic gearboxes. Before replacement, the mounting dimensions, shaft or flange interface, hydraulic motor connection, ratio, brake configuration and operating torque should be checked against the existing gearbox.
Reference dimensions or technical drawings can be provided to support compatibility evaluation for OEM and replacement projects.
High torque capacity: 2,500 Nm rated and 4,000 Nm maximum output torque.
Flexible ratio selection: Single-stage, two-stage and three-stage reduction options.
Hydraulic motor compatibility: Multiple motor options for different hydraulic system configurations.
Brake integration: Maximum brake torque of 450 Nm with a specified brake release pressure range.
Application flexibility: Suitable for industrial and mobile hydraulic power transmission applications.
Payment: Payment terms can be negotiated according to the order.
Delivery: Delivery time depends on product configuration and order quantity.
Service: Technical support is available for product selection, configuration and replacement applications.
The listed maximum output torque of the GFB303 is 4,000 Nm, with a rated output torque of 2,500 Nm.
The listed ratios include 4.3 and 5.3 for single-stage configuration, 15.3, 18.1, 24.5 and 38.4 for two-stage configuration, and 63.1, 77.2, 105 and 178 for three-stage configuration.
The listed options include OMP, OMS, A2FM32, A2FM45, A2FM56 and A2FM63. Final motor selection should be confirmed against the hydraulic system and gearbox configuration.
It can be evaluated for compatible replacement applications. Mounting dimensions, hydraulic motor connection, ratio, brake configuration and torque requirements should be confirmed before replacement.
The listed working pressure is 12.5 MPa.
The listed brake release pressure is 2.5–3 MPa.
