Overview
The ZF 0501.008.573 PUMP is a critical hydraulic power unit engineered for the WG100, WG130, and WG131 transmission series. This OEM genuine part ensures consistent oil flow to the torque converter, clutch packs, and lubrication circuits, maintaining precise hydraulic pressure for smooth gear engagement. The 0501.008.573 pump sits directly on the transmission input shaft, drawing fluid from the sump to pressurize the entire hydraulic system. When replacing this pump, it is common to inspect the 2093109003: DIFFERENTIAL and 0750117075: TAPER ROLLER BEARING for wear, as these components share the same lubrication circuit and can affect pump longevity.
Symptoms of Failure
- Delayed or harsh shifting – A worn 0501.008.573 pump cannot maintain adequate line pressure, causing hesitation or jarring gear changes, especially under load.
- Low hydraulic pressure warnings – Dashboard or diagnostic codes indicating insufficient pressure often trace back to pump cavitation or internal leakage.
- Transmission overheating – Reduced oil flow from a failing pump leads to inadequate cooling, resulting in elevated operating temperatures and potential thermal damage.
- Audible whining or grinding – A damaged pump rotor or worn bushings produce distinct metallic noises during acceleration or deceleration.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0501.008.573 |
| OEM Reference | ZF 0501.008.573 |
| Material | Hardened steel rotor with aluminum housing |
| Weight | 2.4 kg (5.3 lbs) |
| Dimensions (L x W x H) | 180 x 120 x 95 mm |
| Max Operating Pressure | 18 bar (261 psi) |
| Flow Rate | 22 L/min at 2000 RPM |
Compatibility
This pump is specifically designed for ZF WG100, WG130, and WG131 transmissions. It also fits select WG180 and WG200 variants when used with the correct mounting adapter. For differential assemblies, verify the 2093209096: DIFFERENTIAL and 2093309073: DIFF.HOUSING are compatible with your transmission model to avoid driveline misalignment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2093109003 | DIFFERENTIAL | Distributes torque between axles |
| 0750117075 | TAPER ROLLER BEARING | Supports rotating shafts under axial load |
| 2093209096 | DIFFERENTIAL | Secondary differential for planetary gear sets |
| 2093309073 | DIFF.HOUSING | Encloses differential gears and bearings |
| 0631100223 | SPRING PIN | Secures pump alignment dowels |
| 0730300820 | THRUST WASHER | Reduces axial friction in pump shaft |
| 4482360002 | AXLE BEVEL GEAR | Transfers power to differential side gears |
| 2097309085 | DIFFERENTIAL AXLE | Carries differential pinion gears |
| 5838300811 | THRUST WASHER | Prevents gear end-play in differential |
| 4482360001 | DIFFERENTIAL BEVEL GEAR | Engages with axle bevel gear for rotation |
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