Overview
The ZF 0501.209.979 HOSE PIPE is a critical fluid transfer component engineered specifically for the WG 65 Series transmission. This OEM genuine part channels pressurized hydraulic oil between the valve body and the clutch packs, ensuring precise shift timing and consistent lubrication. Positioned within the transmission’s hydraulic circuit, the hose pipe maintains the integrity of the oil flow path under extreme thermal and pressure conditions. The SKU 0501.209.979 is a direct replacement for the original factory-installed hose, guaranteeing a perfect fit and OE-specified performance. When paired with the 4616105413: OUTPUT assembly, this hose pipe ensures seamless power delivery from the torque converter to the driveline.
Symptoms of Failure
When the ZF 0501.209.979 hose pipe deteriorates, operators often notice these specific failure indicators:
- Hydraulic fluid seepage at the hose crimp or connection points – Visible oil residue on the transmission housing or under the vehicle, especially near the 4616203017: OUTPUT FLANGE area.
- Erratic gear engagement or delayed shifting – A worn hose pipe loses internal pressure, causing soft shifts or hesitation when moving from neutral to drive.
- Transmission overheating – Reduced oil flow due to a collapsed or restricted hose leads to elevated operating temperatures and potential clutch slip.
- Audible whining or hissing from the transmission – Air ingress through a cracked hose pipe creates cavitation noise, often accompanied by erratic shift patterns.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 0501.209.979 |
| Product Type | Hydraulic Hose Pipe |
| Length (approx.) | 320 mm |
| Inner Diameter | 12 mm |
| Material | Reinforced synthetic rubber with braided steel |
| Weight | 0.18 kg |
| OEM Reference | ZF 0501.209.979 |
| Max Operating Pressure | 25 bar |
| Temperature Range | -40°C to +120°C |
Compatibility
This hose pipe is primarily designed for the ZF WG 65 Series transmission, commonly found in medium-duty trucks and construction equipment. Based on its hydraulic routing and fitting dimensions, the 0501.209.979 is also compatible with the following ZF models: WG180, WG200, WG210, and WG250. It integrates directly with the 4616101117: TRANSMISSION HOUSING and is secured using the 0636011038: HEXAGON SCREW at the mounting bracket. Always verify your transmission serial number before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616105413 | OUTPUT | Transfers torque from transmission to driveshaft |
| 4616203017 | OUTPUT FLANGE | Connects output shaft to universal joint |
| 4616101117 | TRANSMISSION HOUSING | Encloses and protects internal gear sets |
| 0636011038 | HEXAGON SCREW | Secures hose pipe bracket to housing |
| 0636016015 | HEXAGON SCREW | Fastens output flange to shaft |
| 0631306085 | CYLINDRICAL PIN | Aligns housing components during assembly |
| 0634313118 | O-RING | Seals hydraulic connections |
| 0732611049 | FILTER INSERT | Removes contaminants from transmission fluid |
| 0634303718 | O-RING | Seals filter housing interface |
| 0636610082 | STUD | Provides threaded mounting point for accessories |
