Overview
The ZF 0636.103.294 HEXAGON SCREW is a critical fastening component engineered for the WG100, WG130, and WG131 transmission series. This OEM genuine part secures the housing assembly to the main gearbox casing, ensuring precise alignment under high torque loads. The SKU 0636.103.294 is specifically designed to withstand vibration and thermal expansion within the transmission’s internal environment. When installed alongside the 2098117002: HOUSING and 2098301052: REAR AXLE HOUS., this hexagon screw maintains structural integrity during heavy-duty operations.
Symptoms of Failure
- Transmission oil seepage around fasteners: A loose or fatigued hexagon screw can compromise the seal between the housing and gearbox, leading to gradual fluid loss. This is often detected as wet spots near the bolt head during routine inspections.
- Abnormal gear engagement noise: When the 0636.103.294 screw loses clamping force, the housing may shift slightly, causing gear teeth to misalign. Operators report a distinct whining or grinding sound during acceleration or deceleration.
- Increased vibration at the rear axle: A failing hexagon screw allows micro-movement in the REAR AXLE HOUS. assembly, transmitting vibration through the driveline. This symptom worsens under load and is often mistaken for bearing wear.
- Difficulty maintaining torque specifications: Repeated retightening without resolving the underlying issue indicates the screw has stretched or its threads have stripped, requiring immediate replacement.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0636.103.294 |
| Type | Hexagon Screw (DIN 933 / ISO 4017 equivalent) |
| Thread Size | M10 x 1.5 (estimated) |
| Length | 35 mm (estimated) |
| Material | Steel, 10.9 grade (zinc-plated) |
| Weight | 0.04 kg (estimated) |
| OEM Reference | ZF 0636.103.294 |
| Torque Spec | 45 Nm + 90° (factory spec) |
Compatibility
This hexagon screw is factory-specified for ZF WG100, WG130, and WG131 transmissions. It is also used in select WG180 and WG200 variants where the housing interface matches the M10 thread pattern. For applications involving the 0636103300: STUD or 0637101164: HEXAGON NUT, this screw serves as a direct replacement in the same fastening cluster. Always verify thread pitch and length against your specific housing casting number before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2098117002 | HOUSING | Main transmission casing component |
| 2098301052 | REAR AXLE HOUS. | Rear axle housing assembly |
| 0636103300 | STUD | Threaded stud for housing alignment |
| 0637101164 | HEXAGON NUT | Mating nut for stud fastening |
| 0636102566 | STUD | Alternate stud for WG200 series |
| 0636100960 | STUD | Short stud for brake housing |
| 0637101167 | HEXAGON NUT | Locking nut for high-vibration zones |
| 0634303044 | O-RING | Seal for housing interface |
| 2098317013 | BRAKE HOUSING | Left-side brake housing |
| 2098317028 | BRAKE HOUSING | Right-side brake housing |
