Overview
The ZF 0501.215.640 DRAIN VALVE (SKU: 0501.215.640) is an OEM genuine component engineered for the lubrication and hydraulic circuits of ZF WG-series transmissions. This precision-machined valve is seated directly on the lower sump or housing section, where it controls the release of transmission fluid during service intervals. By ensuring a clean, controlled drain path, it prevents contamination of the oil system and maintains proper hydraulic pressure. The valve interfaces closely with the 4108101110 HOUSING and the 4108201261 HOUSING, forming a sealed unit that protects internal components from debris ingress.
Symptoms of Failure
- Transmission fluid seepage around the drain port: A worn or cracked valve seat allows oil to weep past the seal, leaving visible puddles under the vehicle after parking.
- Erratic gear engagement or slipping: If the valve fails to close fully, hydraulic pressure drops, causing delayed shifts or clutch slip under load.
- Contaminated oil or metal particles in the sump: A broken valve can introduce debris into the fluid circuit, accelerating wear on the 4108301293 BEARING COVER and internal bearings.
- Difficulty maintaining proper oil level: Leakage past the valve makes it impossible to hold the correct fluid level, leading to overheating and reduced transmission life.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0501.215.640 |
| OEM Reference | ZF 0501.215.640 |
| Material | Zinc-plated steel with nitrile seal |
| Thread Size | M22 x 1.5 |
| Overall Length | 45 mm |
| Hex Size | 19 mm |
| Weight | 0.12 kg |
| Torque Specification | 35 Nm |
| Seal Type | Integrated O-ring |
Compatibility
This drain valve is a direct replacement for ZF transmissions in the WG100, WG130, and WG131 series. It is also compatible with the WG180 and WG200 models when used in conjunction with the correct 4108306172 GASKET. For accurate fluid level checks, pair it with the 0501215601 OIL LEVEL GAGE. Always verify the thread pitch and housing interface before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4108101110 | HOUSING | Main transmission housing, valve mounting surface |
| 4108201261 | HOUSING | Secondary housing, oil gallery connection |
| 0501215601 | OIL LEVEL GAGE | Dipstick for fluid level verification |
| 4108301293 | BEARING COVER | Seals bearing cavity, prevents oil loss |
| 4108306172 | GASKET | Seals valve-to-housing interface |
| 0730365280 | TYPE PLATE | Identification plate for transmission model |
| 4108301436 | INPUT SHAFT | Transfers torque from engine to gearset |
| 0735330931 | BALL BEARING | Supports rotating shaft assembly |
| 0630532160 | RETAINING RING | Secures bearing in housing groove |
| 0630531130 | RETAINING RING | Locks shaft in axial position |
