Overview
The ZF 0501.207.040 VENT VALVE is a critical pneumatic component engineered for the WG100, WG130, and WG131 transmission series. This OEM genuine part regulates internal air pressure within the transmission housing, preventing contaminant ingress while allowing heated air to escape during operation. Positioned on the upper casing, the valve interfaces directly with the 4108101112 HOUSING and the 4108201177 HOUSING to maintain a sealed environment. The SKU 0501.207.040 ensures precise fitment and durability under high thermal loads, making it indispensable for maintaining transmission integrity in heavy-duty applications.
Symptoms of Failure
- Oil leaks near the valve port: A worn vent valve allows transmission fluid to seep past the seal, leaving visible drips on the housing exterior.
- Gear engagement hesitation or slipping: When the valve fails to equalize pressure, internal vacuum or overpressure disrupts clutch pack actuation, causing delayed shifts.
- Moisture or dirt inside the transmission: A stuck-open valve draws in contaminants, leading to accelerated wear of components like the 0636302056 SCREW PLUG and bearing surfaces.
- Whistling or hissing sounds from the transmission: Air escaping through a cracked or clogged valve produces audible noise during operation, indicating imminent failure.
Technical Specifications
| Specification | Value |
|---|---|
| OEM Part Number | 0501.207.040 |
| Material | Brass body with nitrile rubber seal |
| Thread Size | M12 x 1.5 |
| Overall Length | 38 mm |
| Hex Size | 17 mm |
| Operating Pressure Range | 0–10 bar |
| Weight | 22 g |
| OEM Reference | ZF 0501.207.040 |
Compatibility
This vent valve is specifically designed for ZF WG series transmissions, including the WG100, WG130, and WG131 models. It also fits select WG180 and WG200 variants where the valve port matches the M12 thread. For proper installation, ensure the mating surface on the 4108301304 BEARING COVER is clean and free of debris. Always pair this valve with a new gasket to prevent leaks.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4108101112 | HOUSING | Main transmission casing section |
| 4108201177 | HOUSING | Secondary housing for valve mounting |
| 0636302056 | SCREW PLUG | Seals oil passages during service |
| 4108301304 | BEARING COVER | Protects output shaft bearing |
| 4108306173 | GASKET | Seals valve-to-housing interface |
| 0750110040 | SHAFT SEAL | Prevents fluid loss at rotating shafts |
| 4108102042 | INPUT | Input shaft assembly |
| 4108302099 | PLANET CARRIER | Holds planetary gear set |
| 4108302007 | BEARINGSHEET | Shim for bearing preload adjustment |
| 0635332196 | BALL BEARING | Supports rotating shafts |
Authorized ZF Distributor
We are a certified supplier of genuine ZF components.
