Overview
The ZF 0636.000.074 HEX CAP SCREW is an OEM genuine fastener engineered for the secure closure of transmission housings in the WG100, WG130, and WG131 series. This critical component, identified by SKU 0636.000.074, anchors the TRANSMISSION HOUSING assembly, ensuring structural integrity under high torque and thermal cycling. As a precision-machined part within the Springs & Fasteners category, it prevents fluid migration and maintains clamping force across the gearbox interface.
Symptoms of Failure
- Transmission fluid seepage at housing joints: A worn or stripped 0636.000.074 screw compromises the seal, leading to visible oil leaks around the HOUSING perimeter.
- Vibration-induced loosening: Fatigue in the hex cap screw causes intermittent gear slippage or abnormal noise during load shifts.
- Corrosion-related thread damage: Exposure to hot transmission fluid accelerates degradation, resulting in difficult removal or cross-threading during service.
- Reduced clamping force: A failing fastener allows micro-movement of the SCREW PLUG and adjacent covers, increasing the risk of internal contamination.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0636.000.074 |
| Thread Size | M10 x 1.5 (estimated) |
| Length | 25 mm |
| Head Type | Hexagon Cap (DIN 912) |
| Material | Alloy Steel, Zinc-Plated |
| Weight | 0.02 kg |
| OEM Reference | ZF 0636.000.074 |
| Torque Specification | 45 Nm (dry) |
Compatibility
This hex cap screw is specifically validated for ZF WG100, WG130, and WG131 transmissions. It also fits select WG180 and WG200 variants where the housing bolt pattern matches. Always verify thread pitch against the OIL LEVEL GAGE port dimensions before installation. For non-standard assemblies, cross-reference with the COVER and INTERM.GEARBOX mounting points.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4108101128 | TRANSMISSION HOUSING | Main gearbox casing |
| 4108201296 | HOUSING | Secondary housing cover |
| 4475280018 | SCREW PLUG | Drain/fill port closure |
| 0501215601 | OIL LEVEL GAGE | Fluid level indicator |
| 4108303034 | COVER | Access panel seal |
| 0636015120 | HEXAGON SCREW | Alternative fastener |
| 0636302015 | SCREW PLUG | Threaded plug variant |
| 0501325471 | SEALING RING | Gasket for leak prevention |
| 0730365280 | TYPE PLATE | Identification label |
| 4108108026 | INTERM.GEARBOX | Intermediate gear assembly |
