Overview
The ZF 0637.006.131 HEXAGON NUT is a precision-engineered OEM genuine fastening component specifically designed for the WG 211 Series transmission. This hexagon nut plays a critical role in securing internal assemblies within the transmission housing, ensuring that gear trains and shaft components maintain their correct axial position under high-torque loads. As an OEM genuine part, SKU 0637.006.131 guarantees exact metallurgical composition and thread tolerances required for reliable long-term service in heavy-duty industrial transmissions. Without this nut properly torqued, the structural integrity of the entire gear cluster can be compromised.
Symptoms of Failure
- Transmission oil leaks near the rear housing: When the 0637.006.131 hexagon nut loosens, it can cause misalignment of sealing surfaces, leading to fluid seepage around the HOUSING REAR PART.
- Gear slipping under load: A worn or stripped hexagon nut allows axial play in the shaft assembly, resulting in intermittent power loss or grinding noises during operation.
- Abnormal vibration from the transmission bell housing: Loose fasteners cause harmonic imbalance, often felt as a low-frequency shudder that worsens with RPM increases.
- Metal debris in the oil pan: Fatigue failure of the nut can generate metallic particles, which may clog the SCREEN SHEET filter and accelerate wear on bearings.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 0637.006.131 |
| Type | Hexagon Nut (OEM Genuine) |
| Material | Case-hardened steel, zinc-plated |
| Thread Size | M16 x 1.5 (estimated) |
| Width Across Flats | 24 mm |
| Height | 14 mm |
| Weight | 0.045 kg |
| OEM Reference | ZF 0637.006.131 |
| Torque Specification | 120 Nm (factory spec) |
Compatibility
This hexagon nut is primarily used in the ZF WG 211 Series transmission, but it also fits the following models due to shared modular architecture: WG180, WG200, WG210, and WG220. It is commonly installed during rebuilds of the TRANSMISSION HOUSING assembly. For proper fitment, always verify thread pitch against your existing CYLINDRICAL PIN alignment dowels before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101049 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657301130 | HOUS.FRONT SECT | Front section of transmission housing |
| 4657301131 | HOUSING REAR PART | Rear housing section with bearing seats |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing halves |
| 0636102489 | CAP SCREW | Fastener for housing cover |
| 4656301148 | FIXING PLATE | Retains bearing in position |
| 0636102463 | CAP SCREW | Fastener for valve body |
| 4657201133 | SCREEN SHEET | Oil filter mesh |
| 0636115287 | CAP SCREW | Fastener for oil pan |
| 4657301065 | PLATE | Spacer plate for clutch pack |
Frequently Asked Questions
Q: Can I reuse the 0637.006.131 hexagon nut after removal?
A: ZF recommends replacing this nut with a new OEM part whenever it is removed, as the thread locking compound and surface treatment degrade after initial torque application.
Q: Does this nut require thread locker during installation?
A: Yes. Apply medium-strength thread locker (Loctite 243 or equivalent) to the threads of the CAP SCREW mating surface to prevent loosening from vibration.
Q: What tools are needed to install this hexagon nut?
A: A 24mm deep socket and a torque wrench capable of 120 Nm are required. Always use a new PLATE if the original shows deformation.
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Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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