Overview
The ZF 0636.016.112 TORNILLO HEXAGONAL is a critical OEM hexagonal bolt engineered specifically for the WG260 series transmission assembly. This precision fastener secures key drivetrain components within the planetary gear system, ensuring proper torque retention and alignment under heavy construction machinery loads. As an original equipment manufacturer part, SKU 0636.016.112 guarantees exact fitment and material hardness to withstand the extreme vibration and shear forces encountered in wheel loaders, graders, and earthmoving equipment. This bolt is typically installed during differential and final drive rebuilds, where it anchors the 2099109002: DIFFERENTIAL and 2099364014: CROWN WHEEL assemblies to the transmission housing.
Symptoms of Failure
- Transmission oil seepage at bolt flange: A loose or fatigued 0636.016.112 bolt can cause micro-gaps between the 2098309010: DIFFERENTIAL HOUSING and the transmission case, leading to visible oil weeping around the hex head.
- Abnormal gear whine or clunking during load shifts: When this hexagonal bolt loses clamping force, the 2099209001: DIFFERENTIAL may shift slightly, creating metal-on-metal contact that produces a distinct whining noise under acceleration.
- Vibration in the driveline at low RPM: Worn or stripped threads on this OEM bolt allow play in the crown wheel mounting, causing a low-frequency shudder felt through the chassis during forward-reverse cycling.
- Premature bearing failure in the planetary set: A loose TORNILLO HEXAGONAL can misalign the differential housing, accelerating wear on adjacent thrust washers and bearings.
Technical Specifications
| Parameter | Value |
|---|---|
| SKU / Part Number | 0636.016.112 |
| Product Name | TORNILLO HEXAGONAL (Hexagonal Bolt) |
| Material | Alloy steel, 10.9 grade, zinc-nickel plated |
| Thread Size | M16 x 2.0 (estimated) |
| Length | 55 mm (estimated) |
| Head Type | Hexagonal, 24 mm wrench size |
| Weight | 0.12 kg (estimated) |
| OEM Reference | ZF 0636.016.112 |
| Torque Specification | 210 Nm (factory spec) |
Compatibility
This OEM hexagonal bolt is designed for the ZF WG260 transmission series, commonly used in construction machinery such as wheel loaders and telehandlers. Based on its thread pattern and load rating, the 0636.016.112 is also compatible with the following ZF transmission models: WG180, WG200, WG250, and WG310. It serves as the primary fastener for the differential housing cover and crown wheel mounting flange in these units. Always verify thread pitch and length against your specific transmission serial number before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2099109002 | DIFFERENTIAL | Distributes torque to axle shafts |
| 2099364014 | CROWN WHEEL | Transfers power from pinion to differential |
| 2099209001 | DIFFERENTIAL | Secondary differential for planetary hubs |
| 2098309010 | DIFFERENTIAL HOUSING | Encloses differential gears and bearings |
| 2098309009 | DIFFERENTIAL HOUSING | Alternate housing variant for WG260 |
| 2098309031 | AXLE BEVEL GEAR | Drives axle shaft rotation |
| 2098309030 | AXLE BEVEL GEAR | Matching bevel gear for differential set |
| 2098309032 | DIFFERENTIAL BEVEL GEAR | Provides speed differentiation between wheels |
| 12883200682 | THRUST WASHER | Reduces axial friction in gear stack |
| 0635332059 | BALL BEARING | Supports rotating shaft loads |
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