Overview
The ZF 0501.209.500 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 leak-proof barrier that maintains hydraulic pressure and prevents contamination ingress. The SKU 0501.209.500 is critical for ensuring that the internal oil circuits remain isolated, directly supporting the performance of the HOUSING and the MOTOR unit. Without this gasket, the transmission cannot sustain the required oil film thickness for gear engagement, leading to premature wear across the entire drivetrain.
Symptoms of Failure
- External oil seepage at the housing joint: When the 0501.209.500 gasket degrades, you will notice wet spots or drips forming where the COVER meets the main casing. This is a common long-tail search query for “ZF WG130 oil leak at gasket.”
- Erratic gear engagement or delayed shifting: A compromised seal allows air to enter the hydraulic circuit, causing spongy or delayed clutch pack application. Operators often search for “transmission slipping after gasket failure.”
- Overheating in the valve body area: Loss of oil volume due to gasket leakage reduces cooling flow, leading to elevated sump temperatures. This symptom is frequently searched as “ZF transmission running hot fix.”
- Contaminated oil with metallic particles: If the gasket fails internally, debris can bypass the filter and circulate through the BUSH bearings, accelerating wear.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0501.209.500 |
| Material | Nitrile rubber (NBR) with fiber reinforcement |
| Inner Diameter | 98.5 mm |
| Outer Diameter | 132.0 mm |
| Thickness | 1.8 mm |
| Weight | 0.04 kg |
| OEM Reference | ZF 0501.209.500 |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This gasket is specifically engineered for the ZF WG100, WG130, and WG131 series power shift transmissions. It is also compatible with the WG180 and WG200 models when used in the same sealing interface between the main housing and the motor adapter plate. Always verify the mating surface condition of the HOUSING before installation to ensure proper compression of the 0501.209.500 seal. For applications involving the MOTOR assembly, this gasket must be replaced whenever the unit is disassembled for service.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4108101140 | HOUSING | Main structural casing that contains the gear sets and valve body. |
| 0501211694 | MOTOR | Hydraulic drive unit that powers the transmission pump. |
| 0501314793 | COVER | End plate that seals the clutch pack chamber. |
| 0501314799 | BUSH | Wear-resistant bearing sleeve for shaft support. |
| 0735370299 | TAPERED ROLLER BEARING | Handles axial and radial loads in the output shaft. |
| 0501317874 | HOUSING | Secondary housing for the PTO drive assembly. |
| 0501317875 | ROLLER | Cylindrical roller for low-friction gear support. |
| 0501209497 | PISTON | Hydraulic actuator for clutch engagement. |
| 0501317876 | COMPRESSION SPRING | Returns the piston to neutral position. |
| 0501314823 | BUSH | Guide bushing for the shift rail. |
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