Overview
The ZF 0501.219.001 PUMP is a critical hydraulic component engineered for the WG 92 Series transmission family. This OEM genuine part serves as the primary fluid mover, generating the necessary oil pressure to actuate clutches, cool internal assemblies, and lubricate gears within the transmission housing. Positioned directly on the pump drive shaft, it draws transmission fluid from the sump and delivers it under pressure to the valve body and torque converter. The SKU 0501.219.001 ensures exact fitment and performance, eliminating the guesswork associated with aftermarket alternatives. When installed alongside a robust 4660101023: TRANSMISSION HOUSING, this pump maintains consistent flow rates essential for heavy-duty operations.
Symptoms of Failure
- Low hydraulic pressure and gear slipping: A worn 0501.219.001 pump cannot sustain adequate pressure, causing delayed engagement or slipping under load, especially during uphill climbs or towing.
- Oil leaks around the pump mounting flange: Deteriorated seals or a cracked pump body allow fluid to escape, leaving puddles under the vehicle and reducing overall system volume.
- Whining or grinding noise from the transmission: Cavitation or bearing wear inside the pump produces a high-pitched whine that intensifies with engine RPM, indicating imminent failure.
- Overheating transmission fluid: Insufficient pump output reduces cooling flow, causing the fluid to exceed safe operating temperatures and accelerating wear on internal components like the 4660301058: HOUSING.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0501.219.001 |
| OEM Reference | ZF 0501.219.001 |
| Material | High-strength aluminum alloy with hardened steel gears |
| Weight | 2.8 kg (6.2 lbs) |
| Overall Dimensions | 180 mm x 120 mm x 95 mm |
| Displacement | 12.5 cc/rev |
| Max Operating Pressure | 22 bar (319 psi) |
| Mounting Bolt Pattern | 4-hole, 90 mm spacing |
Compatibility
This pump is specifically designed for the ZF WG 92 Series, including models such as WG92, WG120, WG150, WG180, and WG200. It is a direct replacement for transmissions used in municipal buses, fire trucks, and heavy construction vehicles. The pump interfaces with the 0631306174: CYLINDRICAL PIN for precise alignment and is secured using a 0750100022: SCREW PLUG to seal the pressure port. Always verify your transmission model suffix before ordering to ensure compatibility with your specific housing configuration.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4660101023 | TRANSMISSION HOUSING | Main structural casing that encloses gears and shafts |
| 4660301058 | HOUSING | Secondary housing for pump or valve body mounting |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel for precise pump-to-housing fit |
| 0750100022 | SCREW PLUG | Seals hydraulic ports against leakage |
| 4660301009 | BRACKET | Supports auxiliary components near the pump |
| 4660221039 | TUBE | Fluid delivery line from pump to cooler |
| 0636103274 | CAP SCREW | Fastener for pump mounting bolts |
| 0634306185 | O-RING | Seals pump-to-housing interface |
| 4660221041 | TUBE | Return line from cooler to sump |
| 4660221040 | TUBE | Pressure line from pump to valve body |
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