Overview
The ZF 0636.015.210 HEXAGON SCREW is a critical fastening component engineered for the WG181 and WG65 transmission series. This OEM genuine part secures key internal assemblies, including the valve body and clutch packs, within the transmission housing. Designed to withstand high torque and thermal cycling, the SKU 0636.015.210 ensures precise clamping force to maintain hydraulic integrity. When paired with a TRANSMISSION HOUSING, this screw prevents misalignment that can lead to pressure loss and gear slippage.
Symptoms of Failure
- Transmission fluid seepage around bolt heads: A worn or stretched 0636.015.210 screw can compromise the seal between the housing and valve body, causing slow oil leaks that worsen over time.
- Intermittent gear hunting under load: When this hexagon screw loses its torque retention, internal components shift, leading to erratic shifting and delayed engagement in WG65 models.
- Metallic rattling from the transmission pan: A loose screw may vibrate against the housing, producing a distinct noise during acceleration, often mistaken for bearing failure.
- Pressure drop in hydraulic circuits: Failure to secure the valve body correctly results in low line pressure, triggering fault codes and reduced power delivery.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0636.015.210 |
| Thread Size | M10 x 1.5 |
| Length | 30 mm |
| Head Type | Hexagon (17 mm socket) |
| Material | Alloy steel, zinc-plated |
| Weight | 0.035 kg |
| OEM Reference | ZF 0636.015.210 |
| Torque Spec | 45 Nm (dry) |
Compatibility
This hexagon screw is directly compatible with ZF WG181 and WG65 series transmissions. It also fits select WG180 and WG200 variants where the valve body uses M10 fasteners. For related fasteners in the same assembly, consider the HEXAGON SCREW 0636011038 for side cover applications, the HEXAGON SCREW 0636011118 for oil pan retention, and the HEXAGON SCREW 0636016015 for filter bracket mounting. Always verify thread pitch and length against your specific transmission model before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616101089 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 0636011038 | HEXAGON SCREW | Side cover fastening |
| 0636011118 | HEXAGON SCREW | Oil pan retention |
| 0636016015 | HEXAGON SCREW | Filter bracket mounting |
| 0631306085 | CYLINDRICAL PIN | Alignment dowel for housing |
| 0634313118 | O-RING | Seals hydraulic passages |
| 0636304019 | SCREW PLUG | Closes test ports |
| 0634801152 | SEALING RING | Prevents fluid leaks at joints |
| 0732611049 | FILTER INSERT | Captures debris in oil circuit |
| 0634303718 | O-RING | Seals valve body cover |
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