Overview
The ZF 0636.304.032 SCREW PLUG is a precision-engineered sealing component designed specifically for the WG 100 Series transmission family. This OEM genuine part, identified by SKU 0636.304.032, functions as a critical port closure within the transmission housing, preventing fluid loss and maintaining internal pressure integrity. It is typically installed in the lower sump or side access ports of the gearbox, where it interfaces directly with the 4651101004: TRANSMISSION HOUSING to secure the oil circuit. Without this screw plug, the transmission cannot maintain its hydraulic seal, leading to immediate operational risks.
Symptoms of Failure
- Oil seepage around the drain port: A worn or cross-threaded ZF 0636.304.032 often causes slow, persistent transmission fluid leaks, especially visible after the vehicle has been parked overnight.
- Low hydraulic pressure warnings: When the screw plug fails to seal, air ingress can occur, triggering erratic shift patterns or delayed engagement in the WG100 gearbox.
- Contaminated fluid from external debris: A compromised plug allows dirt and moisture to enter through the housing opening, accelerating wear on internal components like the 4651301014: HOUSING.
- Visible thread damage or stripping: Over-torquing or repeated removal can deform the plug’s threads, making it impossible to achieve a proper seal without replacement.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 0636.304.032 |
| Thread Size | M18 x 1.5 (estimated) |
| Overall Length | 22 mm |
| Head Type | Hexagon socket (6 mm) |
| Material | Steel, zinc-plated |
| Weight | 0.04 kg |
| OEM Reference | ZF 0636.304.032 |
| Sealing Method | Requires 0634303928: O-RING for proper seal |
Compatibility
This screw plug is primarily validated for the ZF WG 100 Series transmissions, including models WG100, WG120, and WG150. It also fits select variants of the WG180 and WG200 when used in conjunction with the 4651301008: TRANSMISSION HOUSING. Always verify thread pitch and housing depth before installation. For applications requiring a different sealing profile, consider the 0634303312: O-RING as an alternative gasket solution.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4651101004 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4651301014 | HOUSING | Secondary housing for valve body |
| 0634303928 | O-RING | Seal between plug and housing |
| 4651301008 | TRANSMISSION HOUSING | Alternate housing for WG200 series |
| 4651203002 | SCREEN SHEET | Filter mesh for oil intake |
| 4651303005 | SCREEN SHEET | Fine filtration screen |
| 0636101032 | CAP SCREW | Fastener for housing cover |
| 0630361028 | SEALING CAP | Protective cap for unused ports |
| 0634303312 | O-RING | Alternative seal for plug |
| 4645301027 | BRACKET | Mounting bracket for transmission |
