Overview
The ZF 0636.102.704 HEXAGON SCREW is a critical fastening element engineered for the WG100, WG130, and WG131 transmission series. This OEM genuine part secures internal assemblies within the gearbox housing, ensuring precise alignment of planetary gear sets and differential components. As a high-tensile fastener, it withstands extreme torsional loads and thermal cycling. The SKU 0636.102.704 is manufactured to ZF’s exacting tolerances, making it a direct replacement for worn or stripped screws. When paired with a 5838109007: DIFFERENTIAL or a 0750117075: TAPER ROLLER BEARING, this hexagon screw maintains the structural integrity required for heavy-duty industrial applications.
Symptoms of Failure
- Transmission oil seepage at bolt bosses: A loosened or corroded 0636.102.704 screw can compromise housing seals, leading to visible fluid leaks around the fastener points.
- Abnormal gear rattle or vibration: When this hexagon screw fatigues, internal components like the 2095209019: DIFFERENTIAL may shift, causing audible chatter during load changes.
- Intermittent gear engagement failure: A stripped screw allows axial play in the clutch pack, resulting in delayed or slipping gear shifts under torque.
- Metallic debris in transmission fluid: Sheared screw fragments contaminate the oil, often accompanied by a grinding noise from the 0631329086: SPRING PIN assembly.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0636.102.704 |
| Type | Hexagon Head Screw |
| Thread Size | M10 x 1.5 (estimated) |
| Length | 35 mm (estimated) |
| Material | Alloy Steel, 10.9 Grade |
| Surface Finish | Zinc-Nickel Plated |
| Weight | 0.04 kg (estimated) |
| OEM Reference | ZF 0636.102.704 |
| Torque Spec | 45 Nm (estimated) |
Compatibility
This hexagon screw is specifically designed for ZF’s WG series transmissions, including the WG100, WG130, and WG131 models. It is also compatible with the WG180 and WG200 series when used in fastener positions for differential housings and bearing retainers. Always verify thread pitch and length against your transmission’s service manual. For related fastening needs, consider the 5838300817: THRUST WASHER and 5838300682: DIFFERENTIAL AXLE for complete assembly integrity.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109007 | DIFFERENTIAL | Distributes torque between axles |
| 0750117075 | TAPER ROLLER BEARING | Supports radial and axial loads |
| 2095209019 | DIFFERENTIAL | Secondary torque distribution unit |
| 0631329086 | SPRING PIN | Secures shift fork alignment |
| 5838300817 | THRUST WASHER | Reduces axial friction |
| 5838300682 | DIFFERENTIAL AXLE | Transfers power to wheel hubs |
| 5838300811 | THRUST WASHER | Controls end-play in gear sets |
| 5841302064 | THRUST WASHER | High-load axial spacer |
| 5838300137 | OUTER CLUTCH DISK | Transmits torque in clutch pack |
| 5838300138 | INNER CLUTCH DISK | Engages with outer disk for gear shifts |
