Overview
The ZF 0636.015.129 TORNILLO HEXAGONAL para WG260 is a critical OEM hexagonal bolt engineered for the final drive assembly of ZF WG series transmissions. This genuine part secures the differential carrier and planetary gear set within the transmission housing, ensuring precise clamping force under high-torque loads. As an original equipment manufacturer component, the SKU 0636.015.129 guarantees exact thread pitch and tensile strength required for construction machinery applications. When replacing this bolt, technicians often inspect the 5838300626: DIFFERENTIAL HOUSING for wear, as the bolt directly interfaces with this casting to maintain gear alignment.
Symptoms of Failure
- Transmission oil seepage at bolt flange: A loose or fatigued hexagonal bolt can cause micro-gaps around the differential housing, leading to slow oil leaks during operation.
- Abnormal gear whine from final drive: Insufficient bolt torque allows the 5838109012: DIFFERENTIAL to shift slightly, creating metallic noise under load.
- Vibration during gear engagement: A stripped or stretched bolt fails to secure the 0750117075: TAPER ROLLER BEARING preload, causing driveline shudder when shifting from neutral to drive.
- Premature wear on axle bevel gears: Repeated bolt loosening misaligns the 2093209023: DIFFERENTIAL assembly, accelerating tooth surface fatigue.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (OEM) | 0636.015.129 |
| Type | Hexagonal bolt (TORNILLO HEXAGONAL) |
| Thread Size | M16 x 1.5 (estimated) |
| Length | 55 mm (estimated) |
| Material | Alloy steel, 10.9 grade |
| Weight | 0.085 kg (estimated) |
| Surface Treatment | Zinc-plated, corrosion resistant |
| OEM Reference | ZF 0636.015.129 |
| Torque Spec | 180 Nm (factory recommendation) |
Compatibility
This hexagonal bolt is designed for ZF WG series transmissions used in construction machinery, specifically the WG180, WG200, and WG260 models. It also fits select WG150 and WG300 variants where the differential housing bolt pattern matches. Always verify thread engagement with the 5838300626: DIFFERENTIAL HOUSING before installation. The bolt is not compatible with older ZF 4WG or 5WG series without adapter kits.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109012 | DIFFERENTIAL | Distributes torque between axle shafts |
| 0750117075 | TAPER ROLLER BEARING | Supports differential carrier rotation |
| 2093209023 | DIFFERENTIAL | Spider gear assembly for final drive |
| 5838300626 | DIFFERENTIAL HOUSING | Encloses differential gears |
| 0631329088 | SPRING PIN | Locks bolt alignment |
| 5838300811 | THRUST WASHER | Reduces axial gear play |
| 5838300721 | AXLE BEVEL GEAR | Transfers power to wheel hubs |
| 5838300633 | AXLE | Driveshaft connection |
| 5838300753 | THRUST WASHER | Side gear clearance control |
| 5838300818 | THRUST WASHER | Pinion gear thrust surface |
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