Overview
The ZF 0501.324.046 PUMP is a critical hydraulic component engineered specifically for the WG100, WG130, and WG131 transmission series. This OEM genuine part generates the necessary oil flow and pressure to actuate clutch packs, lubricate internal gears, and maintain thermal stability within the transmission housing. Positioned directly on the transmission’s pump drive, it draws fluid from the sump and delivers it under pressure to the valve body and torque converter circuit. The SKU 0501.324.046 is a direct replacement for the original factory-installed unit, ensuring exact fitment and hydraulic performance without modification. When rebuilding a WG-series transmission, this pump is often replaced alongside the 2095109015 DIFFERENTIAL to guarantee complete drivetrain reliability.
Symptoms of Failure
- Low hydraulic pressure and delayed gear engagement — Worn internal gears or scored housing surfaces cause the pump to lose volumetric efficiency, leading to sluggish shifts and hesitation when moving from neutral to drive.
- Persistent transmission overheating — A failing pump cannot circulate sufficient oil through the cooler circuit, resulting in elevated sump temperatures and potential thermal damage to seals and clutches.
- Whining or groaning noise from the transmission — Cavitation or metal-on-metal contact inside the pump produces a distinct high-pitched whine that increases with engine RPM, indicating imminent pump failure.
- Visible oil leaks near the pump mounting flange — Deteriorated O-rings or a cracked pump body allow fluid to escape, often pooling on the bell housing or dripping onto the ground after shutdown.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 0501.324.046 |
| OEM Reference | ZF 0501.324.046 |
| Material | High-strength aluminum alloy housing with hardened steel gears |
| Weight | 2.8 kg (6.2 lbs) |
| Overall Dimensions | 145 mm x 95 mm x 85 mm |
| Displacement | 18.5 cc/rev |
| Maximum Operating Pressure | 22 bar (320 psi) |
| Mounting Bolt Torque | 25 Nm (18.4 lb-ft) |
Compatibility
This pump is designed exclusively for ZF WG-series powershift transmissions. It is a direct fit for the following models: WG100, WG130, and WG131. While the pump itself is not used in the WG180 or WG200 series, those larger transmissions share related hydraulic components such as the 0750117075 TAPER ROLLER BEARING and the 2095209037 DIFFERENTIAL. Always verify your transmission model tag before ordering to ensure correct fitment. For complete axle rebuilds, the 2095309059 DIFF.HOUSING is also commonly serviced in conjunction with this pump.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2095109015 | DIFFERENTIAL | Distributes torque to axle shafts |
| 0750117075 | TAPER ROLLER BEARING | Supports rotating shafts under axial load |
| 2095209037 | DIFFERENTIAL | Alternative differential assembly for WG series |
| 2095309059 | DIFF.HOUSING | Encloses differential gears and bearings |
| 0631329086 | SPRING PIN | Secures pump drive gear to shaft |
| 0730300820 | THRUST WASHER | Controls axial clearance in pump assembly |
| 4482360002 | AXLE BEVEL GEAR | Transfers power to wheel hubs |
| 2095309081 | DIFFERENTIAL AXLE | Carries differential side gears |
| 5838300811 | THRUST WASHER | Reduces friction in differential assembly |
| 4482360001 | DIFFERENTIAL BEVEL GEAR | Engages with axle bevel gear for final drive |
