Overview
The ZF 0501.207.959 HOSE PIPE is a critical fluid conduit engineered specifically for the WG 250 Series transmission. This OEM genuine part directs pressurized hydraulic oil between the valve body and the clutch pack assembly, ensuring precise lubrication and cooling within the gear train. The SKU 0501.207.959 is designed to withstand high thermal cycling and constant vibration, maintaining a leak-free seal under extreme operating loads. When installed correctly, this hose pipe supports consistent shift quality and extends the service life of adjacent components such as the TRANSMISSION HOUSING and the HOUSING.
Symptoms of Failure
When the 0501.207.959 hose pipe deteriorates, operators may notice these specific failure indicators:
- Hydraulic fluid seepage around the transmission bell housing – A slow leak often appears as a thin film of oil near the pipe connection points, leading to low fluid levels and eventual overheating.
- Erratic gear engagement or delayed shifting – Reduced hydraulic pressure from a cracked or softened hose pipe causes sluggish clutch application, especially under load.
- Audible whining or cavitation noise – Air ingestion through a compromised hose pipe creates a high-pitched sound during transmission operation, indicating inadequate lubrication.
- Visible swelling or cracking on the hose exterior – Exposure to hot oil and ozone causes the rubber to degrade, often visible as blisters or longitudinal cracks near the crimped fittings.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0501.207.959 |
| Material | Reinforced synthetic rubber with steel braid |
| Overall Length | 380 mm (approx.) |
| Inner Diameter | 12 mm |
| Operating Pressure | 18 bar (max) |
| Temperature Range | -40°C to +120°C |
| OEM Reference | ZF 0501.207.959 |
| Weight | 0.35 kg |
Compatibility
This hose pipe is primarily designed for the ZF WG 250 Series, but it also fits select models in the WG180 and WG200 families due to shared hydraulic routing architecture. It is a direct replacement for units manufactured between 2005 and 2020. Always verify fitment by cross-referencing the COVER and HEXAGON SCREW configurations on your specific transmission assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4646101029 | TRANSMISSION HOUSING | Encloses gear train and supports hydraulic circuits |
| 4646301090 | HOUSING | Holds valve body and oil passages |
| 4646301087 | COVER | Seals the housing and protects internal components |
| 0636015304 | HEXAGON SCREW | Secures housing and cover assemblies |
| 0636101828 | CAP SCREW | Fastens pipe brackets to transmission body |
| 4646301102 | COVER SHEET | Protects wiring harness from oil splash |
| 4646301235 | COVER SHEET | Insulates clutch pack area from debris |
| 0730365067 | TYPE PLATE | Displays transmission serial number and specs |
| 0631311009 | GROOVED STUD | Aligns and mounts valve body components |
| 0636101193 | CAP SCREW | Attaches cover sheets to transmission housing |
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