Overview
The ZF 2099.311.014 FITTED KEY is a precision-engineered OEM genuine component designed for heavy-duty construction machinery transmissions. This fitted key serves as a critical torque-transfer interface, locking rotating assemblies—such as gears, clutches, or shafts—to their respective hubs within the transmission housing. By ensuring zero-slip engagement, it prevents rotational backlash and maintains driveline integrity under extreme loads. The part number 2099.311.014 is manufactured to ZF’s exacting tolerances, guaranteeing a secure fit that eliminates fretting and premature wear. In the assembly, this fitted key often works in concert with the 2093140001: HOISTING UNIT and the 2093240001: LIFTING SHAFT to manage power distribution in wheel loaders and excavators.
Symptoms of Failure
When the ZF 2099.311.014 FITTED KEY wears or shears, operators may notice these specific failure indicators:
- Transmission gear slipping under load – A worn key allows the gear to rotate independently on the shaft, causing intermittent power loss during digging or lifting cycles.
- Metallic knocking or clunking from the transmission housing – Backlash from a loose fitted key produces audible impact noises, especially when shifting between forward and reverse.
- Oil contamination with metal particles – As the key degrades, it sheds fine metallic debris into the transmission fluid, which can be detected during routine oil analysis.
- Vibration at the hoisting unit attachment point – A failing key destabilizes the 2093140001: HOISTING UNIT, leading to abnormal oscillation during boom operation.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number / SKU | 2099.311.014 |
| Material | Case-hardened alloy steel (16MnCr5 equivalent) |
| Overall Length | 48.0 mm |
| Width | 14.0 mm |
| Height | 10.0 mm |
| Weight | 0.052 kg |
| OEM Reference | ZF 2099.311.014 |
| Surface Finish | Ground and deburred |
| Hardness (HRC) | 58–62 |
Compatibility
This fitted key is primarily used in ZF’s WG series powershift transmissions, including the WG180, WG200, and WG210 models. It also appears in select 4WG-200 and 6WG-250 variants found in articulated dump trucks and large wheel loaders. The key interfaces directly with the 2095340002: BUSH and the 2093340007: BRACKET to secure the output shaft assembly. For accurate fitment, always verify your transmission’s serial number against ZF’s parts catalog.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2093140001 | HOISTING UNIT | Transfers hydraulic power to the lifting mechanism |
| 2093240001 | LIFTING SHAFT | Transmits rotary motion from the transmission to the hoist |
| 2095340002 | BUSH | Provides a wear-resistant bearing surface for the shaft |
| 2093340007 | BRACKET | Supports and aligns the hoisting unit assembly |
| 0501327177 | PLAIN BEARING | Reduces friction between rotating and stationary parts |
| 2093340008 | BRACKET | Secondary bracket for transmission mounting stability |
| 5838300323 | BEARING BUSH | Encapsulates the shaft to prevent lateral movement |
| 0636011381 | HEXAGON SCREW | Secures the bracket and bush in position |
| 0632604006 | LUBRICATING NIPPLE | Allows grease injection into the bearing assembly |
| 5838300240 | SEALING RING | Prevents oil leakage at the shaft exit point |
Frequently Asked Questions
Q: Can I reuse the ZF 2099.311.014 fitted key after disassembly?
No. This is a single-use component. Once installed and torqued, the key undergoes plastic deformation to create a zero-clearance fit. Reusing it risks shear failure and transmission damage.
Q: What torque should I apply to the retaining bolt when installing this key?
Refer to ZF service manual 4WG-200/210 for exact values. Typically, the hexagon screw (0636011381) requires 85 N·m with thread locker applied.
Q: Does this fitted key work with the 2093340008 bracket?
Yes. The 2099.311.014 key is designed to lock the shaft into the 2093340008: BRACKET on WG200 transmissions. Always inspect the bracket’s keyway for wear before installation.
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Phone: +86 158 2286 3467 |
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