Overview
The ZF 0636.011.447 HEXAGON SCREW is a critical fastening component engineered specifically for the WG200 series transmission assembly. This OEM genuine part secures the TRANSMISSION HOUSING and adjacent structural elements, ensuring precise clamping force to maintain gear alignment and oil seal integrity. Manufactured to ZF’s exacting tolerances, the SKU 0636.011.447 replaces worn or stripped fasteners that compromise drivetrain stability. Its hexagonal head design allows for reliable torque application during installation, directly supporting the HOUSING assembly’s structural rigidity.
Symptoms of Failure
- Transmission oil seepage at housing joints: A loose or fatigued 0636.011.447 screw can create micro-gaps, leading to slow fluid loss around the HOUSING interface.
- Audible rattling or vibration during gear shifts: Insufficient clamping from a degraded hexagon screw allows internal components to shift, producing metallic noise under load.
- Gradual gear engagement delay: When this fastener fails to secure the TRANSMISSION HOUSING properly, shaft alignment drifts, causing sluggish response in WG200 series units.
- Visible thread galling or corrosion on the screw shank: Exposure to heat cycles and transmission fluid can degrade the hexagon screw, leading to stripping during removal or re-torque.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number / SKU | 0636.011.447 |
| Head Type | Hexagon (Hex) |
| Thread Size (estimated) | M10 x 1.5 |
| Length (estimated) | 35 mm |
| Material | Alloy Steel, Zinc-Plated |
| Weight | ~0.04 kg |
| OEM Reference | ZF 0636.011.447 |
| Torque Specification | 45 Nm (dry) / 38 Nm (lubricated) |
Compatibility
This hexagon screw is primarily designed for the WG 200 Series transmissions, including models WG180, WG200, and WG210. It is also used in select ZF off-highway and marine gearboxes that share the same housing bolt pattern. Always verify thread pitch and length against your specific TYPE PLATE before installation. The 0636.011.447 screw works in tandem with the GROOVED STUD to anchor the housing assembly securely.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101165 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 4644301304 | HOUSING | Secondary housing cover for valve body |
| 0730365067 | TYPE PLATE | Identification plate with transmission specs |
| 0631311009 | GROOVED STUD | Alignment dowel for housing positioning |
| 4644106300 | SHIFT SYSTEM | Gear selection mechanism assembly |
| 4644306500 | COVER PLATE | Sealing plate for access port |
| 4644159300 | SHIFT SYSTEM | Alternate shift actuator variant |
| 4644306560 | VALVE BLOCK | Hydraulic control manifold |
| 4644306408 | WASHER | Sealing washer for fluid passages |
| 4644107015 | SPEEDOMETER | Output speed sensor drive |
