Overview
The ZF 2098.340.055 RELAY LEVER is a precision-machined actuation component within the final drive assembly of heavy-duty construction machinery transmissions. This OEM genuine part functions as the mechanical interface between the shift mechanism and the differential lock or axle disconnect system, translating linear motion into rotational force. Located inside the transmission housing, the relay lever directly engages with the 2098109042 DIFFERENTIAL to control power distribution. The SKU 2098.340.055 is engineered to ZF’s original tolerances, ensuring precise engagement without backlash. When paired with the 2098309011 CROWN WHEEL and the 2099209001 DIFFERENTIAL, this lever maintains synchronized operation under extreme torque loads.
Symptoms of Failure
- Delayed differential lock engagement: A worn relay lever causes a noticeable lag when activating the differential lock, often accompanied by a grinding noise during engagement.
- Intermittent gear slipping under load: As the lever loses its indexing precision, the transmission may momentarily slip out of gear when climbing grades or pushing heavy loads.
- Oil contamination from metal debris: Fractured relay lever edges shed metallic particles into the transmission fluid, visible as glitter in oil samples during routine maintenance.
- Erratic shift feel in the operator cab: Operators report a “spongy” or inconsistent resistance when moving the shift lever, indicating the relay lever is no longer providing positive mechanical feedback.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 2098.340.055 |
| Material | Case-hardened alloy steel (16MnCr5) |
| Overall Length | 142 mm ± 0.5 mm |
| Lever Arm Diameter | 28 mm |
| Pivot Bore Diameter | 12 mm (H7 tolerance) |
| Weight | 0.85 kg |
| Surface Treatment | Phosphate coating + oil impregnation |
| OEM Reference | ZF 2098.340.055 |
| Torque Capacity | 450 Nm (peak) |
Compatibility
This relay lever is designed for ZF’s WG-series powershift transmissions commonly used in wheel loaders, graders, and dump trucks. It is a direct fit for the WG180, WG200, and WG211 models. Additionally, it is compatible with the ZF 4WG-200 and ZF 6WG-250 series when used in conjunction with the 2098309010 DIFFERENTIAL HOUSING. Always verify your transmission serial number before ordering, as minor variations exist between early and late production runs.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2098109042 | DIFFERENTIAL | Distributes torque between axles |
| 2098309011 | CROWN WHEEL | Transfers rotational force to differential |
| 2099209001 | DIFFERENTIAL | Secondary torque distribution unit |
| 2098309010 | DIFFERENTIAL HOUSING | Encloses differential gears |
| 2098309009 | DIFFERENTIAL HOUSING | Alternate housing variant |
| 2098309031 | AXLE BEVEL GEAR | Drives axle shaft rotation |
| 2098309030 | AXLE BEVEL GEAR | Matched set with 2098309031 |
| 2098309032 | DIFFERENTIAL BEVEL GEAR | Distributes torque within differential |
| 12883200682 | THRUST WASHER | Reduces axial friction |
| 0635332059 | BALL BEARING | Supports rotating shaft loads |
