Overview
The ZF 0501.200.072 VENT VALVE is a critical pressure-regulation component engineered for the WG100, WG130, and WG131 transmission series. Positioned on the upper valve body or housing assembly, this OEM genuine part equalizes internal air pressure, preventing vacuum buildup and contamination ingress. The SKU 0501.200.072 ensures precise venting during thermal expansion cycles, safeguarding hydraulic circuit integrity. When paired with a 4143101009 HOUSING or a 4143301025 HOUSING, this valve maintains optimal lubrication flow and reduces seal stress.
Symptoms of Failure
- Transmission oil leaks near the vent port: A worn 0501.200.072 allows pressurized fluid to escape, leaving visible drips on the housing exterior.
- Gear engagement hesitation or slipping: Clogged venting causes internal pressure spikes, delaying clutch pack actuation during shifts.
- Milky or aerated transmission fluid: A failed valve draws moisture and debris into the sump, oxidizing the oil and reducing lubricity.
- Whistling or hissing sounds from the valve body: Restricted airflow through the vent creates audible noise under load, indicating imminent failure.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 0501.200.072 |
| Material | Brass with stainless steel spring |
| Overall Length | 42 mm |
| Thread Size | M14 x 1.5 |
| Hex Size | 17 mm |
| Weight | 28 grams |
| OEM Reference | ZF 0501.200.072 |
| Operating Pressure | 0.5–1.2 bar |
Compatibility
This vent valve is factory-specified for ZF WG100, WG130, and WG131 transmissions. It also fits select WG180 and WG200 variants when used with the correct 0634313603 O-RING and 4475280018 SCREW PLUG. Always verify housing bore dimensions; the 0501.200.072 replaces older vent designs in post-2010 production units. For throttle body applications, confirm compatibility with the 4143221013 THROTTLE VALVE assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 0501342341 | SUPPORT RING | Reinforces vent valve seating |
| 4143298457 | SEAL KIT | Includes gaskets for valve body |
| 0634313591 | O-RING | Seals vent valve to housing |
| 0636101068 | CAP SCREW | Secures valve cover plate |
| 4143221013 | THROTTLE VALVE | Regulates hydraulic pressure |
| 0634304484 | O-RING | Secondary vent seal |
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