Overview
The ZF 0501.332.390 WHEEL STUD is a critical OEM genuine fastening component engineered for heavy-duty construction machinery transmissions. This stud secures the wheel hub assembly to the planetary gear carrier, ensuring precise torque retention under extreme loads and vibration. Positioned within the final drive section of ZF powershift transmissions, the 0501.332.390 wheel stud directly interfaces with the hub flange to maintain wheel alignment and driveline integrity. As an OEM genuine part, it guarantees exact metallurgical composition and thread pitch specifications required for long-term reliability in excavators, wheel loaders, and graders.
Symptoms of Failure
- Wheel wobble or vibration at low speeds: A worn or stretched 0501.332.390 wheel stud allows micro-movement between the hub and drum, causing perceptible shimmy during loading cycles.
- Uneven tire wear patterns: When this stud loses clamping force, the wheel assembly shifts incrementally, leading to scalloped or feathered tire edges within 200 operating hours.
- Audible clicking from the final drive: A loose wheel stud produces a metallic clicking sound during directional changes, often misdiagnosed as a bearing issue.
- Oil seepage around the hub flange: Compromised stud tension can distort the hub gasket surface, allowing transmission oil to weep past the seal.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0501.332.390 |
| Thread Size | M20 x 1.5 (estimated) |
| Overall Length | 95 mm |
| Thread Length | 45 mm |
| Material | Alloy steel, 10.9 grade |
| Surface Treatment | Zinc-nickel plating |
| Weight | 0.18 kg |
| OEM Reference | ZF 0501.332.390 |
| Torque Specification | 450 Nm (dry) |
Compatibility
This wheel stud is designed for ZF WG180, WG200, and WG310 series powershift transmissions commonly used in construction machinery. It also fits select APL300 and APL400 final drive assemblies. The 0501.332.390 is frequently specified for Liebherr, Caterpillar, and Volvo wheel loaders that utilize ZF drivetrains. For precise fitment verification, always cross-reference your transmission serial number with the OEM parts catalog.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2093140001 | HOISTING UNIT | Lifts and positions the transmission assembly during service |
| 2093240001 | LIFTING SHAFT | Provides pivot point for hoisting attachment |
| 2095340002 | BUSH | Reduces friction between lifting shaft and bracket |
| 2093340007 | BRACKET | Mounts hoisting unit to transmission housing |
| 0501327177 | PLAIN BEARING | Supports rotating shafts within the transmission |
| 2093340008 | BRACKET | Secondary bracket for auxiliary component mounting |
| 5838300323 | BEARING BUSH | Wear-resistant insert for pivot points |
| 0636011381 | HEXAGON SCREW | Secures bearing bush and bracket assemblies |
| 0632604006 | LUBRICATING NIPPLE | Grease fitting for periodic lubrication |
| 5838300240 | SEALING RING | Prevents fluid leakage at shaft interfaces |
When replacing the 0501.332.390 wheel stud, inspect the associated 2093140001 HOISTING UNIT and 2093240001 LIFTING SHAFT for wear, as these components share load paths. The 2095340002 BUSH and 2093340007 BRACKET should also be checked for deformation when stud torque is compromised.
Frequently Asked Questions
Q: Can I reuse the 0501.332.390 wheel stud after removal?
A: ZF recommends replacing this stud whenever it is removed, as the torque-to-yield design can cause permanent elongation. Reusing it risks clamping force loss and wheel separation.
Q: What is the correct tightening procedure for this stud?
A: Apply anti-seize compound to the threads, then tighten to 450 Nm in a single continuous motion. Never use impact wrenches, as they can over-torque and fracture the stud.
Q: Does this stud fit ZF WG180 transmissions from 2010?
A: Yes, the 0501.332.390 is backward compatible with WG180 units produced after 2005. Verify your hub flange thickness to ensure thread engagement of at least 1.5 times the stud diameter.
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