Overview
The ZF 0636.015.049 HEXAGON SCREW is a critical fastening component 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 hexagon-headed bolt, it withstands high torque loads and vibration during heavy-duty operation. The SKU 0636.015.049 is manufactured to ZF’s exacting tolerances, making it essential for maintaining structural integrity in the transmission’s fastener system. When paired with a 5838109007: DIFFERENTIAL, this screw guarantees stable mounting of the differential unit, preventing axial movement that could lead to premature wear.
Symptoms of Failure
- Oil seepage around the housing joint: A loosened or fatigued hexagon screw can compromise the seal between transmission sections, causing gradual ATF leaks. This is often noticed as drips under the vehicle after extended operation.
- Gear engagement hesitation or slipping: When the 0636.015.049 fails to maintain clamping force, internal components like the 0750117075: TAPER ROLLER BEARING may shift, leading to delayed shifts or torque loss during acceleration.
- Unusual metallic rattling from the transmission: A broken or stripped hexagon screw allows adjacent parts to vibrate against each other, producing a distinct noise that worsens under load.
- Increased end-play in the differential assembly: Failure of this fastener can cause excessive movement in the 2095209019: DIFFERENTIAL, resulting in uneven tire wear or driveline vibration.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 0636.015.049 |
| Head Type | Hexagon (External Hex) |
| Thread Size | M10 x 1.5 (estimated) |
| Length | 35 mm (estimated) |
| Material | High-tensile steel, zinc-plated |
| Weight | 0.045 kg (approx.) |
| OEM Reference | ZF 0636.015.049 |
| Grade | 10.9 (estimated) |
Compatibility
This hexagon screw is specifically designed for ZF’s WG-series transmissions, including the WG100, WG130, and WG131 models. It also fits select variants of the WG180 and WG200 series when used in the same fastener location. The part is commonly employed in construction equipment, agricultural machinery, and heavy-duty trucks that utilize these ZF gearboxes. For proper installation, always pair with a new 0631329086: SPRING PIN to lock the screw in place against rotational loosening.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109007 | DIFFERENTIAL | Distributes torque to drive axles |
| 0750117075 | TAPER ROLLER BEARING | Supports rotating shafts under axial/radial loads |
| 2095209019 | DIFFERENTIAL | Secondary differential for multi-axle drives |
| 0631329086 | SPRING PIN | Secures fasteners against vibration loosening |
| 5838300817 | THRUST WASHER | Reduces axial friction in gear sets |
| 5838300682 | DIFFERENTIAL AXLE | Transmits power from differential to wheels |
| 5838300811 | THRUST WASHER | Controls end-play in planetary carriers |
| 5841302064 | THRUST WASHER | Spacer for clutch pack clearance |
| 5838300137 | OUTER CLUTCH DISK | Friction surface for gear engagement |
| 5838300138 | INNER CLUTCH DISK | Steel plate for clutch pack assembly |
