Overview
The ZF 0501.209.498 GASKET is a precision-engineered sealing component designed for the WG100, WG130, and WG131 transmission series. This OEM genuine part sits between the transmission housing and the motor assembly, creating a critical barrier that prevents fluid migration and maintains internal pressure integrity. The SKU 0501.209.498 is manufactured to ZF’s exacting tolerances, ensuring a perfect fit within the valve body or pump interface area. When installed alongside a 4108101140 HOUSING, this gasket provides the necessary seal to support optimal hydraulic flow and component longevity.
Symptoms of Failure
- External oil seepage at the housing joint: A worn 0501.209.498 gasket often causes visible fluid trails around the WG100/WG130/WG131 mating surfaces, leading to gradual fluid loss and potential transmission overheating.
- Erratic shift quality or delayed engagement: When this seal degrades, internal pressure drops can cause “gear slipping under load” or “hard shifting between gears,” particularly in heavy-duty applications.
- Contaminated transmission fluid: A compromised gasket may allow debris ingress or cross-contamination between circuits, resulting in “dark or burnt-smelling ATF” and reduced lubrication efficiency.
- Increased operating noise: Loss of seal integrity can introduce air into the hydraulic system, producing “whining or groaning sounds from the transmission” during acceleration.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0501.209.498 |
| Material | Nitrile rubber (NBR) with fiber reinforcement |
| Thickness | 1.5 mm ± 0.1 mm |
| Outer Diameter | 98 mm |
| Inner Diameter | 72 mm |
| Weight | 0.012 kg |
| OEM Reference | ZF 0501.209.498 |
| Temperature Range | -40°C to +150°C |
Compatibility
This gasket is specifically engineered for ZF industrial transmissions in the WG series. Verified compatible models include WG100, WG130, and WG131. It may also be suitable for certain WG180 and WG200 variants where the pump-to-housing interface matches the 98 mm outer diameter specification. Always verify fitment by cross-referencing the 0501.209.498 part number against your transmission’s service manual. For complete assembly restoration, consider pairing this gasket with a 0501211694 MOTOR and 0501314793 COVER to ensure all sealing surfaces are renewed simultaneously.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4108101140 | HOUSING | Encloses the gear train and supports bearing alignment |
| 0501211694 | MOTOR | Hydraulic drive unit for clutch actuation |
| 0501314793 | COVER | Seals the motor cavity and retains internal components |
| 0501314799 | BUSH | Wear-resistant guide for rotating shafts |
| 0735370299 | TAPERED ROLLER BEARING | Supports axial and radial loads on output shafts |
| 0501317874 | HOUSING | Secondary housing for auxiliary pump assembly |
| 0501317875 | ROLLER | Reduces friction in planetary gear sets |
| 0501209497 | PISTON | Converts hydraulic pressure into mechanical force |
| 0501317876 | COMPRESSION SPRING | Returns piston to neutral position |
| 0501314823 | BUSH | Guide bushing for shift fork mechanism |
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