Overview
The ZF 0501.206.019 HOSE PIPE is a critical fluid transfer component engineered specifically for the WG 201 Series transmission. This OEM genuine part channels hydraulic oil between the valve body and the cooler circuit, ensuring consistent lubrication and thermal regulation during high-torque operations. As a precision-molded conduit, the SKU 0501.206.019 maintains pressure integrity within the transmission’s lubrication gallery, directly supporting clutch pack cooling and bearing protection. When paired with a robust 4644101160: TRANSMISSION HOUSING, this hose pipe forms a sealed pathway that prevents contamination ingress while withstanding continuous exposure to ATF fluids at elevated temperatures.
Symptoms of Failure
- Hydraulic fluid seepage at hose connections – Deteriorated hose material or cracked fittings cause visible oil drips beneath the transmission bell housing, often mistaken for pan gasket leaks.
- Erratic gear engagement under load – A compromised hose pipe reduces line pressure to the clutch packs, resulting in delayed shifts or slipping during acceleration, particularly in WG201 units operating in heavy-duty applications.
- Overheating transmission fluid – Restricted flow through a collapsed or kinked hose pipe starves the cooler circuit, triggering thermal warning lights and burnt fluid odor.
- Air entrainment in hydraulic circuits – Cracks in the hose wall allow air ingestion, causing spongy shift feel and foaming fluid that accelerates wear on seals and valves.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0501.206.019 |
| Material | Reinforced synthetic rubber with textile braid |
| Inside Diameter | 12.5 mm |
| Outside Diameter | 19.0 mm |
| Length (Overall) | 320 mm |
| Weight | 0.12 kg |
| Operating Pressure | 12 bar (max) |
| Temperature Range | -40°C to +150°C |
| OEM Reference | ZF 0501.206.019 |
| Thread Type | M16 x 1.5 (both ends) |
Compatibility
This hose pipe is designed for the ZF WG 201 Series, but its application extends to several related transmission models that share the same hydraulic routing architecture. Compatible transmissions include the WG180, WG200, and WG211 series, particularly those produced after 2005 with integrated oil-to-air coolers. The part also fits select Ecomat 4HP and 6HP variants where the cooler line configuration mirrors the WG201 layout. For installations requiring a replacement 4644301323: TRANSMISSION HOUSING, verify that the hose routing channels align with the housing casting to avoid kinking. Always inspect the 4644301189: THREADED BUSH and 4475280043: SCREW PLUG at the connection points for thread wear before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101160 | TRANSMISSION HOUSING | Encloses gear train and valve body assembly |
| 4644301323 | TRANSMISSION HOUSING | Alternate housing variant for WG201 |
| 4644301189 | THREADED BUSH | Provides threaded interface for hose fittings |
| 4475280043 | SCREW PLUG | Seals unused hydraulic ports |
| 0634306198 | O-RING | Seals hose-to-housing connections |
| 0730365067 | TYPE PLATE | Identifies transmission model and specs |
| 4644301161 | COVER PLATE | Protects valve body access opening |
| 0636100621 | HEXAGON SCREW | Fastens housing and cover components |
| 0631610020 | SET SCREW | Adjusts shift linkage or detent positions |
| 0501218540 | BREATHER | Equalizes internal pressure and vents moisture |
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