Overview
The ZF 0501.332.083 PUMP is a critical hydraulic component engineered for the WG100, WG130, and WG131 transmission series. This OEM genuine part serves as the primary fluid mover, generating the necessary oil pressure to actuate clutch packs, lubricate internal gears, and maintain thermal stability within the transmission housing. Positioned directly on the pump drive housing, the 0501.332.083 ensures consistent hydraulic flow for smooth power delivery. When servicing this pump, it is common to inspect the 2095109020 DIFFERENTIAL for wear, as both components share the same lubrication circuit. The SKU 0501.332.083 is a direct replacement for original factory equipment, guaranteeing precise fitment and OEM-spec pressure output.
Symptoms of Failure
- Low hydraulic pressure and gear slipping: A worn 0501.332.083 pump cannot maintain adequate pressure, causing delayed engagement or slipping under load, especially in WG130 transmissions.
- Audible whining or groaning from the transmission: Cavitation or internal scoring in the pump produces a distinct high-pitched noise during acceleration, often misdiagnosed as bearing failure.
- Overheating and erratic shift quality: Insufficient oil flow leads to elevated sump temperatures and harsh shifts, as the pump fails to supply the valve body with consistent volume.
- Visible oil leaks near the pump housing: Seal degradation or housing cracks allow fluid to escape, leaving puddles under the bell housing area.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 0501.332.083 |
| OEM Reference | ZF 0501.332.083 |
| Material | High-grade aluminum alloy with hardened steel gears |
| Weight | 2.4 kg (5.3 lbs) |
| Dimensions (L x W x H) | 180 mm x 95 mm x 85 mm |
| Flow Rate | 18 L/min @ 2000 RPM |
| Max Operating Pressure | 18 bar (261 psi) |
| Seal Type | Viton dual-lip seal |
Compatibility
This pump is specifically designed for ZF WG100, WG130, and WG131 transmissions. It is also compatible with WG180 and WG200 series when used with the appropriate adapter plate. During installation, technicians often replace the 0750117075 TAPER ROLLER BEARING and the 2095209037 DIFFERENTIAL to prevent future failures. For heavy-duty applications, verify that the 2095309059 DIFF.HOUSING is free of cracks before reassembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2095109020 | DIFFERENTIAL | Distributes torque to output shafts |
| 0750117075 | TAPER ROLLER BEARING | Supports rotating shafts under axial load |
| 2095209037 | DIFFERENTIAL | Secondary differential for planetary gear sets |
| 2095309059 | DIFF.HOUSING | Encloses differential gears and bearings |
| 0631329086 | SPRING PIN | Secures pump gear alignment |
| 0730300820 | THRUST WASHER | Reduces axial friction in pump assembly |
| 4482360002 | AXLE BEVEL GEAR | Transfers power to differential axles |
| 2095309081 | DIFFERENTIAL AXLE | Connects differential to wheel hubs |
| 5838300811 | THRUST WASHER | Prevents axial play in differential |
| 4482360001 | DIFFERENTIAL BEVEL GEAR | Drives the differential carrier |
