Overview
The ZF 0636.011.381 HEXAGON SCREW is a critical fastening component engineered for the WG100, WG130, and WG131 transmission series. This OEM genuine part secures key internal assemblies, including the differential housing and bearing caps, ensuring precise alignment under high torque loads. The SKU 0636.011.381 is manufactured to ZF’s exacting tolerances, preventing loosening from vibration and thermal cycling. When installed alongside the 2093109002: DIFFERENTIAL, this hexagon screw maintains the structural integrity of the gear train, directly influencing shift quality and power delivery.
Symptoms of Failure
- Transmission fluid seepage from bolt holes: A worn or stripped 0636.011.381 hexagon screw can compromise the seal between the differential housing and the main case, leading to slow oil leaks that worsen over time.
- Abnormal gear whine or clunking during acceleration: When this fastener loses clamping force, the 0750117075: TAPER ROLLER BEARING may shift slightly, creating audible noise and premature bearing wear.
- Intermittent gear slipping under load: Loose fasteners allow the differential assembly to move, causing momentary loss of torque transfer, particularly in WG100/WG130 units operating at high GVW.
- Metallic debris in transmission fluid: A failing hexagon screw can shear or fatigue, releasing steel particles that contaminate the oil and damage adjacent components like the 2093209095: DIFFERENTIAL.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (SKU) | 0636.011.381 |
| Type | Hexagon Screw (Socket Head Cap) |
| Thread Size | M12 x 1.75 (estimated) |
| Length | 45 mm (1.77 in) |
| Material | Alloy Steel, 10.9 Grade |
| Surface Finish | Zinc-Plated (Yellow Passivated) |
| Weight | 0.04 kg (0.09 lbs) |
| OEM Reference | ZF 0636.011.381 |
| Torque Specification | 85 Nm (62.7 lb-ft) |
Compatibility
This hexagon screw is specifically designed for ZF WG-series transmissions, including the WG100, WG130, and WG131 models. It is also compatible with the WG180 and WG200 series when used in differential housing applications. The 0636.011.381 screw directly interfaces with the 2093309071: DIFF.HOUSING, making it essential for rebuilds of these heavy-duty gearboxes. Always verify thread pitch and length against your specific transmission variant before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2093109002 | DIFFERENTIAL | Distributes torque between axles |
| 0750117075 | TAPER ROLLER BEARING | Supports differential rotation under load |
| 2093209095 | DIFFERENTIAL | Secondary differential assembly component |
| 2093309071 | DIFF.HOUSING | Encloses and supports differential gears |
| 0631100223 | SPRING PIN | Secures shift fork alignment |
| 0730300820 | THRUST WASHER | Reduces axial friction in gear sets |
| 4482360002 | AXLE BEVEL GEAR | Transfers power to axle shafts |
| 2097309085 | DIFFERENTIAL AXLE | Connects differential to wheel hubs |
| 5838300811 | THRUST WASHER | Controls end-play in differential |
| 4482360001 | DIFFERENTIAL BEVEL GEAR | Primary gear for torque splitting |
Frequently Asked Questions
Q: Can the 0636.011.381 hexagon screw be reused after removal?
A: ZF recommends replacing this fastener with a new OEM part during any transmission rebuild. The 10.9-grade alloy steel can experience micro-stretching under torque, reducing clamping force if reused.
Q: What tools are required to install this screw?
A: A hex key (Allen wrench) sized for M12 socket head caps is needed. Always use a calibrated torque wrench set to 85 Nm to avoid over-tightening the differential housing.
Q: Will this part fit the ZF WG180 transmission?
A: Yes, the 0636.011.381 is compatible with WG180 and WG200 models when used to secure the differential assembly. However, always cross-reference your transmission’s parts manual for exact placement.
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Phone: +86 158 2286 3467 |
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