Overview
The ZF 0636.015.261 HEXAGON SCREW is a critical OEM genuine fastener engineered for secure assembly within the WG100, WG130, and WG131 transmission series. This precision-machined component anchors key housing assemblies, ensuring structural integrity under high torque and thermal stress. As a genuine ZF part, the SKU 0636.015.261 guarantees exact thread pitch and tensile strength, preventing loosening during operation. It is commonly installed alongside the 4108101057: HOUSING and 4108201177: HOUSING to secure the transmission casing, and works in tandem with the 0636302056: SCREW PLUG for fluid sealing points.
Symptoms of Failure
- Transmission oil seepage at housing joints: A worn or stripped hexagon screw cannot maintain clamping force, leading to gradual fluid loss around the 4108301304: BEARING COVER interface.
- Abnormal gear engagement noise: Loose fasteners allow micro-movement between the housing and control cover, producing a distinct rattling sound during shifts.
- Increased vibration from the transmission bell housing: When the hexagon screw fails, the assembly loses rigidity, causing harmonic vibrations that worsen under load.
- Difficulty maintaining hydraulic pressure: A compromised screw can distort gasket surfaces, reducing sealing efficiency and causing erratic clutch pack behavior.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0636.015.261 |
| Thread Size | M10 x 1.5 |
| Length | 35 mm |
| Head Type | Hexagon (6-point) |
| Material | High-tensile steel, zinc-plated |
| Weight | 0.025 kg |
| OEM Reference | ZF 0636.015.261 |
| Torque Spec | 45 Nm (dry) |
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 secondary housing bolt patterns. Always verify thread pitch against your existing fastener before installation. For related sealing components, consider the 4108306173: GASKET and 0750110040: SHAFT SEAL to complete your rebuild kit.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4108101057 | HOUSING | Main transmission casing section |
| 4108201177 | HOUSING | Rear housing assembly |
| 0636302056 | SCREW PLUG | Fluid drain/fill port sealing |
| 4108301304 | BEARING COVER | Protects output shaft bearing |
| 4108306173 | GASKET | Seals housing-to-cover interface |
| 0750110040 | SHAFT SEAL | Prevents fluid leakage at shaft exit |
| 6053108155 | CONTROL COVER | Valve body access cover |
| 6053308348 | CONTROL COVER | Secondary control module cover |
| 0636010188 | HEXAGON SCREW | Alternate M8 fastener for smaller housings |
| 0636010192 | HEXAGON SCREW | Alternate M12 fastener for high-load points |
Frequently Asked Questions
Q: Can I reuse the 0636.015.261 hexagon screw after disassembly?
A: ZF recommends replacing this fastener with a new OEM part each time it is removed, as the thread-locking coating and tensile properties degrade after initial torquing.
Q: What torque should I apply to this screw?
A: Tighten to 45 Nm in a dry condition. If using thread-locking compound, reduce torque by 10% to avoid thread galling.
Q: Does this screw fit the WG180 transmission?
A: Yes, it is compatible with WG180 models when used in the side housing bolt pattern, but always cross-reference your existing screw length and thread pitch before purchase.
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Phone: +86 158 2286 3467 |
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