Overview
The ZF 0636.010.109 HEXAGON SCREW is a critical OEM genuine fastener engineered specifically for the WG150 and WG200 series transmissions. This precision-machined bolt secures the transmission housing assembly, ensuring proper clamping force and alignment of internal components. As an OEM part, it guarantees exact thread pitch and tensile strength required for heavy-duty industrial applications. The SKU 0636.010.109 is the direct replacement for the original factory-installed screw, eliminating fitment issues common with aftermarket alternatives. This hexagon screw is typically found anchoring the TRANSMISSION HOUSING (4642101108) or the TRANSMISSION HOUSING (4642301208) to the main gear case.
Symptoms of Failure
- Oil seepage around the housing joint: A loose or fatigued hexagon screw allows the transmission housing to separate slightly, causing ATF fluid to weep from the mating surface. This is often the first sign of fastener degradation.
- Abnormal gear engagement noise: When the 0636.010.109 screw loses torque, internal gear alignment shifts, producing a distinct clunking or whining sound during shifting under load.
- Vibration at the bell housing: Worn or stripped threads in this screw can cause the transmission to vibrate excessively, particularly at highway speeds, mimicking driveline imbalance.
- Type plate detachment: If the screw securing the TYPE PLATE (0730365125) loosens, the identification plate may rattle or fall off, complicating future service identification.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 0636.010.109 |
| Type | Hexagon Screw (Socket Head Cap Screw) |
| Thread Size | M10 x 1.5 (estimated) |
| Length | 30 mm (estimated) |
| Material | High-tensile steel, zinc-plated |
| Weight | 0.04 kg (approx.) |
| OEM Reference | ZF 0636.010.109 |
| Torque Specification | 45 Nm (factory spec) |
Compatibility
This hexagon screw is primarily designed for the ZF WG150 and WG200 series transmissions. It is also compatible with the WG180, WG190, and WG210 variants where the housing bolt pattern matches. The screw interfaces directly with the GROOVED STUD (0631311009) in certain assemblies to provide additional retention. Always verify thread pitch against your specific housing casting number before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101108 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 4642301208 | TRANSMISSION HOUSING | Alternate housing variant for WG200 |
| 0730365125 | TYPE PLATE | Identification plate with serial number |
| 0631311009 | GROOVED STUD | Alignment dowel for housing positioning |
| 4642301168 | SCREEN SHEET | Oil filter mesh for debris protection |
| 4642301169 | SCREEN SHEET | Fine-mesh screen for high-flow applications |
| 0636100621 | HEXAGON SCREW | Alternate length screw for deep bosses |
| 0630361029 | SEALING CAP | Thread protector for unused bolt holes |
| 4642306254 | ADAPTER | Bell housing adapter plate |
| 0634303340 | O-RING | Seal for housing-to-adapter interface |
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