Overview
The ZF 2099.228.004 BRAKE HOUSING is a critical structural component within the final drive assembly of heavy-duty construction machinery transmissions. This OEM genuine part encloses and protects the brake disc pack and actuation mechanism, ensuring consistent braking torque is transmitted to the axle shafts. Machined from high-strength cast iron, the housing maintains precise alignment of the brake pistons and seals, directly influencing stopping performance and safety. The SKU 2099.228.004 is engineered to ZF’s exacting tolerances, providing a direct replacement that restores original clamping force and heat dissipation in demanding off-highway applications.
Symptoms of Failure
- External oil seepage around the axle flange: When the brake housing distorts or its sealing surface corrodes, transmission fluid leaks past the gasket, leaving visible drips on the differential housing and undercarriage.
- Reduced braking force or spongy pedal feel: Cracks or wear in the housing allow the brake piston bore to deform, causing internal fluid bypass and a loss of hydraulic pressure to the brake pack.
- Metallic grinding noise during turns: A warped housing can misalign the brake discs, creating intermittent contact with the 2098309011: CROWN WHEEL or adjacent gears, producing a distinct grinding sound under load.
- Overheating of the axle assembly: Restricted oil flow through a damaged housing cavity prevents proper cooling of the brake pack, leading to thermal discoloration and premature seal failure.
Technical Specifications
| Part Number | 2099.228.004 |
| Material | Ductile cast iron (EN-GJS-500-7) |
| Overall Length | 285 mm |
| Outer Diameter | 210 mm |
| Mounting Bolt Pattern | 12 x M12 on 180 mm PCD |
| Weight | 8.7 kg |
| OEM Reference | ZF 2099.228.004 |
| Surface Treatment | Phosphate coating with oil seal bore |
Compatibility
This brake housing is designed for ZF’s WG series power-shift transmissions commonly used in wheel loaders, graders, and telehandlers. It directly fits the following models: WG180, WG200, WG211, and WG240. The housing interfaces with the 2098309010: DIFFERENTIAL HOUSING and works in tandem with the 2098109042: DIFFERENTIAL assembly. For complete axle rebuilds, pairing this housing with the 2099209001: DIFFERENTIAL ensures proper gear mesh and load distribution. Always verify your transmission serial number before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2098109042 | DIFFERENTIAL | Distributes torque between axle shafts |
| 2098309011 | CROWN WHEEL | Transfers final drive power to differential |
| 2099209001 | DIFFERENTIAL | Complete differential carrier assembly |
| 2098309010 | DIFFERENTIAL HOUSING | Encloses differential gears and bearings |
| 2098309009 | DIFFERENTIAL HOUSING | Alternative housing variant for WG series |
| 2098309031 | AXLE BEVEL GEAR | Drives the differential ring gear |
| 2098309030 | AXLE BEVEL GEAR | Matching bevel gear for input pinion |
| 2098309032 | DIFFERENTIAL BEVEL GEAR | Side gear for differential spider assembly |
| 12883200682 | THRUST WASHER | Controls axial play in differential gears |
| 0635332059 | BALL BEARING | Supports differential carrier rotation |
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