Overview
The ZF 4699.303.236 WHEEL STUD is a critical fastening component engineered for the final drive assembly of heavy-duty construction machinery transmissions. This OEM genuine part secures the wheel hub to the planetary carrier, ensuring precise torque transfer under extreme loads. Located within the axle housing interface, the stud (SKU: 4699.303.236) works in concert with the 4699101159: HOUSING to maintain axial alignment. When installed correctly, it prevents rotational slippage between the wheel and drivetrain, directly impacting machine tractive effort. This genuine ZF part is manufactured from high-tensile alloy steel to withstand cyclic stress in excavators, wheel loaders, and graders.
Symptoms of Failure
- Wheel wobble at low speeds: A worn or stretched 4699.303.236 stud causes lateral play, detectable as vibration during tight turns or reversing. This often precedes catastrophic hub separation.
- Uneven tire wear patterns: When the wheel stud loses clamping force, the hub assembly shifts incrementally, creating scalloped wear on drive tires. Operators may notice this after 200-400 hours of operation.
- Metallic clicking from axle area: A loose stud produces intermittent clicking sounds during acceleration or deceleration, indicating the wheel is micro-shifting against the 4699301254: HOUSING flange.
- Torque loss during operation: If the stud fractures, the wheel may suddenly lose drive power, mimicking transmission slip. Immediate inspection of the 4699298049: HOUSING KIT is recommended.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4699.303.236 |
| Material | Alloy Steel, Grade 10.9 |
| Thread Size | M20 x 1.5 |
| Overall Length | 95 mm |
| Thread Length | 45 mm |
| Hex Flange Diameter | 30 mm |
| Weight | 0.18 kg |
| OEM Reference | ZF 4699.303.236 |
| Heat Treatment | Induction hardened to HRC 32-38 |
| Surface Finish | Zinc-nickel plated, 8 µm |
Compatibility
This wheel stud is designed for ZF WG series transmissions commonly found in construction machinery. Verified compatible models include WG180, WG200, and WG250 final drives. It also fits select ZF APL-300 and ZF HP-500 axle configurations used in telescopic handlers. Always cross-reference your existing stud with the 4699309123: HOUSING COVER bore dimensions to confirm fitment. For machines operating in high-vibration environments (e.g., rock crushers), pairing this stud with a new 0636104255: CAP SCREW and 0631306174: CYLINDRICAL PIN is strongly advised to maintain clamping integrity.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699101159 | HOUSING | Main structural carrier for planetary gears |
| 4699301254 | HOUSING | Axle housing section for wheel bearing support |
| 4699298049 | HOUSING KIT | Complete housing assembly with seals and bearings |
| 4699309123 | HOUSING COVER | End cover protecting internal splines |
| 0636104255 | CAP SCREW | Secures housing cover to axle |
| 0631306174 | CYLINDRICAL PIN | Alignment pin for housing mating surfaces |
| 0636302013 | SCREW PLUG | Oil drain plug for final drive |
| 0501331653 | SCREW PLUG | Magnetic fill plug for debris capture |
| 0634801038 | SEALING RING | Copper washer for plug sealing |
| 0637885613 | BREATHER | Pressure relief valve for axle housing |
