A4VG replacements require careful review of control, charge system, rotation, shaft, flange, ports and application conditions.
Send the complete A4VG reference.: Include the machine model, nameplate and port-side photos.
Closed-circuit pump comparison record
| Review group | Evidence needed | Risk if omitted |
|---|---|---|
| Main pump | Displacement, pressure and rotation | Incorrect capacity or drive direction |
| Control | Complete control and feedback configuration | Machine response or control conflict |
| Charge system | Charge pump and relief information | Insufficient charge pressure or overheating |
| Installation | Shaft, flange, ports and through-drive drawing | Mechanical or hose-layout conflict |
Critical comparison points
- Displacement and pressure rating
- Control and feedback configuration
- Charge pump and relief settings
- Rotation, shaft and mounting flange
- Port orientation and through-drive
- Machine control and commissioning requirements
Risk controls
- Do not select by series name alone
- Request dimensional confirmation
- Confirm control-system compatibility
- Plan sample or supervised commissioning for higher-risk applications
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