Overview
The ZF 2093.309.087 ADJUSTMENT PLATE is a precision-machined shim component engineered for the final drive assembly of heavy-duty construction machinery transmissions. This OEM genuine part, identified by SKU 2093.309.087, sits between the differential housing and the axle bevel gear to establish the correct preload and backlash tolerances. By controlling axial clearance, this adjustment plate ensures that the 5838109012: DIFFERENTIAL rotates smoothly under extreme torque loads. Without the precise thickness of this plate, gear mesh patterns degrade rapidly, leading to premature wear on the entire drivetrain.
Symptoms of Failure
- Excessive drivetrain backlash during load shifts — When the adjustment plate wears or deforms, the 0750117075: TAPER ROLLER BEARING loses its preload, creating a clunking sensation when the machine changes direction.
- Persistent gear whine from the differential housing — A worn plate allows the 2093209023: DIFFERENTIAL to shift axially, producing a high-pitched noise under acceleration.
- Oil contamination with metallic particles — As the plate degrades, it sheds fine metal shavings into the lubricant, often visible during routine oil sampling.
- Uneven tire wear on drive axles — Incorrect adjustment forces the 5838300626: DIFFERENTIAL HOUSING to misalign, causing constant torque variation between wheels.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number / SKU | 2093.309.087 |
| Material | Case-hardened alloy steel (DIN 1.7131) |
| Thickness | 2.50 mm ± 0.02 mm |
| Outer Diameter | 142.0 mm |
| Inner Diameter | 82.5 mm |
| Weight | 0.185 kg |
| Surface Finish | Ground, Ra ≤ 0.8 µm |
| OEM Reference | ZF 2093.309.087 |
Compatibility
This adjustment plate is designed for ZF heavy-duty powershift transmissions used in wheel loaders, graders, and dump trucks. It is a direct fit for the ZF WG180, WG200, and WG210 series. The part also integrates with the ZF 4WG-200 and 5WG-210 transmission families. Always verify the plate thickness against your service manual, as multiple shim variants exist for fine-tuning differential preload.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109012 | DIFFERENTIAL | Distributes torque between drive axles |
| 0750117075 | TAPER ROLLER BEARING | Supports differential carrier rotation |
| 2093209023 | DIFFERENTIAL | Secondary differential assembly |
| 5838300626 | DIFFERENTIAL HOUSING | Encloses differential gears and bearings |
| 0631329088 | SPRING PIN | Secures adjustment plate alignment |
| 5838300811 | THRUST WASHER | Reduces axial friction on gears |
| 5838300721 | AXLE BEVEL GEAR | Transfers power to wheel axles |
| 5838300633 | AXLE | Drives wheel hub assembly |
| 5838300753 | THRUST WASHER | Controls side gear clearance |
| 5838300818 | THRUST WASHER | Adjusts differential pinion end play |
Frequently Asked Questions
Q: How do I know if my ZF 2093.309.087 adjustment plate is worn?
A: Measure the plate thickness with a micrometer. If it is below 2.45 mm, or if you observe uneven contact patterns on the differential gear faces, replacement is required. Always replace the 0750117075: TAPER ROLLER BEARING simultaneously to maintain correct preload.
Q: Can I reuse this plate during a differential rebuild?
A: No. The adjustment plate is a single-use crush shim. Reusing it will result in incorrect backlash and rapid failure of the 5838109012: DIFFERENTIAL assembly. Always install a new OEM plate.
Q: What torque specification applies to the differential housing bolts when installing this plate?
A: For the 5838300626: DIFFERENTIAL HOUSING, tighten M12 bolts to 110 N·m in a crosswise pattern. Verify final backlash between 0.15–0.25 mm using a dial indicator.
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