Overview
The ZF 0636.010.216 HEXAGON SCREW is a critical fastening component engineered specifically for the WG181 and WG251 transmission series. This OEM genuine part secures the TRANSMISSION HOUSING assembly, ensuring precise clamping force and structural integrity under high-torque conditions. Designed to withstand extreme vibration and thermal cycling, the SKU 0636.010.216 functions as a primary retention element within the gearbox casing. Its hexagonal head design allows for accurate torque application during installation, preventing loosening over extended service intervals. This screw is manufactured to ZF’s exacting metallurgical standards, providing reliable performance in heavy-duty industrial applications.
Symptoms of Failure
- Transmission fluid seepage around bolt heads: When the hexagon screw loses its clamping tension, oil can migrate past the sealing interface, leading to gradual fluid loss and potential contamination.
- Abnormal gear housing noise during operation: A loose or fatigued screw allows micro-movement between the HOUSING components, generating audible rattling or knocking sounds under load.
- Reduced gear engagement precision: Insufficient fastening force alters the alignment of internal assemblies, causing delayed or rough shifting patterns in the transmission.
- Visible thread galling or corrosion: Exposure to high temperatures and lubricants can degrade the screw’s surface, resulting in difficult removal or complete fastener failure during maintenance.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 0636.010.216 |
| Head Type | Hexagon (External Hex) |
| Thread Size | M10 x 1.5 (estimated) |
| Overall Length | 35 mm (estimated) |
| Material | High-tensile alloy steel, zinc-plated |
| Weight | 0.04 kg (estimated) |
| OEM Reference | ZF 0636.010.216 |
| Torque Specification | 45 Nm (factory recommended) |
Compatibility
This hexagon screw is designed for the ZF WG180, WG181, WG200, and WG251 series transmissions. It is commonly used in off-highway vehicles, construction equipment, and agricultural machinery. The part interfaces directly with the THREADED BUSH and the TYPE PLATE mounting points. Always verify thread pitch and length against your specific transmission model before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101047 | TRANSMISSION HOUSING | Main casing enclosing gear sets and shafts |
| 4644301380 | HOUSING | Secondary cover or adapter housing |
| 4644301189 | THREADED BUSH | Threaded insert for screw retention |
| 0730365067 | TYPE PLATE | Identification plate for transmission model |
| 0631311009 | GROOVED STUD | Alignment stud for housing positioning |
| 4644301161 | COVER PLATE | Access cover for internal inspection |
| 0636100621 | HEXAGON SCREW | Alternate fastener for different torque specs |
| 0631610020 | SET SCREW | Adjustable locking screw for preload |
| 0634801098 | SEALING RING | Fluid seal between housing joints |
| 4644301117 | FIXING PLATE | Retention plate for bearing assemblies |
