Overview
The ZF 0501.221.006 OIL DISTRIBUTOR is a critical hydraulic component engineered to precisely meter and direct lubrication oil within the internal passages of ZF heavy-duty transmissions. Positioned directly on the main shaft assembly, this OEM genuine part ensures that high-pressure transmission fluid reaches planetary gear sets, clutch packs, and bearing surfaces at the correct volume and pressure. Without a properly functioning oil distributor, internal components suffer from inadequate lubrication, leading to accelerated wear and thermal damage. The SKU 0501.221.006 is manufactured to ZF’s exacting tolerances, guaranteeing a perfect seal and uninterrupted oil flow in demanding construction machinery applications.
Symptoms of Failure
- Intermittent gear slipping under load: When the oil distributor wears, inconsistent hydraulic pressure causes clutch packs to slip, especially during heavy excavation or grading operations.
- Visible oil leaks near the transmission housing: A cracked or warped distributor body allows pressurized oil to escape, often pooling beneath the bell housing or around the PTO cover.
- Delayed engagement or harsh shifting: Restricted oil flow from a clogged or damaged distributor results in sluggish gear engagement and abrupt clutch application, reducing operator control.
- Overheating transmission fluid: Insufficient lubrication due to a failing oil distributor forces internal components to run hotter, triggering warning lights or thermal shutdowns.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0501.221.006 |
| Material | High-strength aluminum alloy with anodized coating |
| Weight | 0.85 kg (1.87 lbs) |
| Outer Diameter | 72 mm |
| Length | 145 mm |
| Oil Passage Diameter | 8 mm (primary), 6 mm (secondary) |
| OEM Reference | ZF 0501.221.006 |
| Operating Pressure Range | 8–22 bar |
Compatibility
This oil distributor is engineered for ZF’s WG series powershift transmissions commonly found in construction machinery. It is a direct fit for the WG180, WG200, and WG250 models, as well as the WG310 series used in wheel loaders and graders. The part also integrates seamlessly with the 2093109027 DIFFERENTIAL and 2093209095 DIFFERENTIAL assemblies, ensuring consistent oil delivery to the differential housing. When replacing this distributor, technicians should also inspect the 0750117075 TAPER ROLLER BEARING and the 2093309071 DIFF.HOUSING for signs of wear, as these components share the same lubrication circuit.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2093109027 | DIFFERENTIAL | Distributes torque between axles |
| 0750117075 | TAPER ROLLER BEARING | Supports rotating shaft loads |
| 2093209095 | DIFFERENTIAL | Secondary torque distribution unit |
| 2093309071 | DIFF.HOUSING | Encloses differential gears |
| 0631100223 | SPRING PIN | Secures alignment of oil passages |
| 0730300820 | THRUST WASHER | Reduces axial friction |
| 4482360002 | AXLE BEVEL GEAR | Transfers power to wheel hubs |
| 2097309085 | DIFFERENTIAL AXLE | Connects differential to final drive |
| 5838300811 | THRUST WASHER | Controls end-play in gear sets |
| 4482360001 | DIFFERENTIAL BEVEL GEAR | Primary gear within differential |
Authorized ZF Distributor
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