Two motors with the same nominal displacement can differ in pressure capability, speed, shaft load, brake, flushing, porting and mounting. Record the complete installed configuration before requesting a replacement.
Need help identifying a hydraulic motor?: Send the nameplate, shaft, flange, ports and machine information. We will separate confirmed details from the open checks.
First identify the motor type
| Motor type | Useful visible clues | Extra evidence |
|---|---|---|
| Orbital motor | Compact gerotor housing, shaft and side or rear ports | Displacement, shaft, flange and drain requirement |
| Axial piston motor | Piston-unit housing, control or displacement hardware | Fixed or variable function, case drain and control |
| Radial piston motor | Large low-speed high-torque housing or wheel interface | Cam or displacement configuration, brake and mounting |
| Swing or travel motor | Motor, brake and reduction assembly | Machine model, reduction ratio and valve configuration |
Mechanical interfaces
- Shaft form, spline count, diameter and usable length
- Mounting flange, pilot and bolt pattern
- Port thread, flange type, position and orientation
- Case-drain and flushing connections
- Brake release and reduction interface where applicable
Operating requirements
- Continuous and peak pressure
- Required torque and starting behavior
- Continuous and maximum speed
- Direction of rotation and reversible duty
- Fluid, temperature and contamination level
- Radial or axial shaft loads
Control and safety checks
- Fixed or variable displacement
- Hydraulic or electronic control reference
- Overcenter, brake or anti-cavitation valve function
- Fail-safe behavior and stopping requirement
- Machine-side speed sensing or feedback
Minimum RFQ package
- Complete motor nameplate
- Installed and removed-unit photos
- Machine make and model
- Shaft, flange and port measurements
- Pressure, speed, torque or machine performance requirement
- Failure reason and acceptable modification level
Manufacturer names, trademarks, and model numbers are used for identification and cross-reference purposes only. Compatibility must be confirmed for each application.