Overview
The ZF 0501.207.969 HOSE PIPE is a critical fluid transfer component engineered specifically for the WG250 and WG260 series transmissions. This OEM genuine part channels pressurized hydraulic oil between the valve body and the cooler circuit, ensuring consistent lubrication and thermal regulation within the gearset. As a direct replacement for the original factory-installed line, the SKU 0501.207.969 guarantees exact fitment and material compatibility with ZF’s proprietary sealing systems. Without this hose pipe, the transmission cannot maintain proper oil flow, leading to rapid wear of internal bearings and clutch packs.
Symptoms of Failure
- External hydraulic oil seepage at the cooler line connection: When the hose pipe degrades, fluid escapes around the crimped fittings, leaving visible drips under the vehicle after operation.
- Erratic gear engagement or delayed shifting: A collapsed or internally delaminated hose restricts oil volume, causing pressure drops that result in harsh or slipping shifts during load changes.
- Transmission overheating under moderate load: Restricted flow through a damaged hose pipe reduces cooling capacity, triggering thermal alarms or elevated temperature gauge readings on the dash.
- Air ingestion into the hydraulic circuit: Cracks in the hose wall allow air to mix with the oil, producing a foamy appearance on the dipstick and erratic clutch application.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0501.207.969 |
| Material | Reinforced synthetic rubber with braided textile layer |
| Overall Length | 410 mm (estimated) |
| Inner Diameter | 12.7 mm (1/2 inch) |
| Outer Diameter | 22.5 mm |
| Weight | 0.18 kg |
| OEM Reference | ZF 0501.207.969 |
| Operating Pressure | 12 bar (174 psi) max |
| Temperature Range | -40°C to +120°C |
Compatibility
This hose pipe is a direct-fit component for the ZF WG250 and WG260 series transmissions, commonly found in medium-duty trucks, buses, and off-highway equipment. It also serves the WG180 and WG200 models where the cooler line routing matches the same bend radius. The part interfaces directly with the TRANSMISSION HOUSING (4646101066) and the HOUSING (4646301228) assembly. For secure mounting, the HEXAGON SCREW (0636015304) and the COVER (4646301251) must be properly torqued during installation to prevent vibration fatigue on the hose ends.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4646101066 | TRANSMISSION HOUSING | Main structural casing enclosing the gear train |
| 4646301228 | HOUSING | Secondary housing for valve body and oil passages |
| 4646301251 | COVER | Sealing cover for the hydraulic control unit |
| 0636015304 | HEXAGON SCREW | Fastener for securing housing covers |
| 0636101828 | CAP SCREW | Threaded fastener for pressure line flanges |
| 4646301100 | COVER SHEET | Thin metal gasket for oil pan sealing |
| 4646301217 | COVER SHEET | Reinforced cover for filter access port |
| 4646201007 | SCREEN SHEET | Mesh filter element for suction line debris |
| 0730365125 | TYPE PLATE | Identification tag with transmission serial number |
| 0631311009 | GROOVED STUD | Alignment pin for clutch housing positioning |
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