Overview
The ZF 0636.104.022 CAP SCREW is a critical fastening component engineered specifically for the WG150 transmission series. This OEM genuine part secures the transmission housing assembly, ensuring that internal components remain precisely aligned under high torque and thermal stress. As a cap screw, it provides a flush, sealed closure that prevents contamination ingress and maintains hydraulic pressure integrity. The SKU 0636.104.022 is manufactured to ZF’s exacting tolerances, making it a direct replacement for worn or damaged fasteners in your WG150 gearbox. When paired with a robust TRANSMISSION HOUSING (4642101109), this cap screw guarantees a leak-free interface between the housing and valve body sections.
Symptoms of Failure
- Transmission fluid seepage around the housing bolt holes: A worn or stripped 0636.104.022 cap screw cannot maintain the necessary clamping force, leading to slow oil leaks that leave residue on the transmission exterior.
- Abnormal gear engagement noise or vibration: When this fastener loosens, the TRANSMISSION HOUSING (4642301205) may shift slightly under load, causing misalignment that results in clunking or whining sounds during shifting.
- Intermittent loss of hydraulic pressure: A compromised cap screw allows the housing halves to separate microscopically, reducing pump pressure and causing delayed or slipping gear changes in the WG150.
- Visible corrosion or thread galling on the screw head: Over time, thermal cycling can degrade the cap screw’s surface, making removal difficult and risking damage to the housing threads.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 0636.104.022 |
| OEM Reference | ZF 0636.104.022 |
| Material | High-strength alloy steel, zinc-plated |
| Thread Size | M10 x 1.5 (estimated) |
| Overall Length | 35 mm |
| Head Type | Hex socket cap (flush-mount) |
| Weight | 0.04 kg (0.09 lbs) |
| Torque Specification | 45 Nm (33 ft-lbs) |
Compatibility
This cap screw is primarily designed for the ZF WG150 series, but its dimensions and thread pitch also make it suitable for adjacent models in the WG family. Compatible transmissions include the WG180, WG200, and WG210 series, where similar housing fastening points exist. For applications requiring a different mounting configuration, consider the GROOVED STUD (0631311009) for stud-based assemblies. Always verify the thread depth and housing thickness against your specific unit, as variations in the TYPE PLATE (0730365125) may indicate different revision levels.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101109 | TRANSMISSION HOUSING | Main structural casing for gear and shaft assembly |
| 4642301205 | TRANSMISSION HOUSING | Secondary housing section for valve body integration |
| 0730365125 | TYPE PLATE | Identification plate with transmission serial and model data |
| 0631311009 | GROOVED STUD | Threaded stud for precise alignment of housing halves |
| 4642301168 | SCREEN SHEET | Filter mesh for hydraulic fluid debris capture |
| 4642301169 | SCREEN SHEET | Alternative mesh screen for high-flow applications |
| 0636100621 | HEXAGON SCREW | Standard hex-head fastener for auxiliary brackets |
| 4642301186 | SCREEN SHEET | Fine-mesh screen for particle filtration |
| 4644106319 | SHIFT SYSTEM | Complete shift fork and actuator assembly |
| 4644159356 | SHIFT SYSTEM | Alternative shift system with different ratio linkage |
