Overview
The ZF 0501.223.098 HOSE PIPE is a critical fluid transfer component engineered specifically for the WG 65 Series transmission family. This OEM genuine part channels pressurized hydraulic oil between the valve body and the cooler circuit, ensuring consistent lubrication and thermal regulation within the gearbox. As a precision-formed conduit, it maintains flow integrity under high-temperature, high-vibration conditions typical of heavy-duty industrial applications. The SKU 0501.223.098 is manufactured to ZF’s exacting tolerances, guaranteeing a leak-free interface with the 4616101065 TRANSMISSION HOUSING and associated mounting points. Without this hose pipe, the transmission cannot sustain proper oil circulation, leading to rapid component degradation.
Symptoms of Failure
- External hydraulic oil leaks – Cracks or abrasions in the hose pipe wall cause visible fluid seepage around the transmission housing, often pooling beneath the vehicle or machine.
- Erratic gear engagement or slipping – Reduced oil pressure from a compromised hose pipe starves the clutch packs, resulting in delayed shifts or unintended neutral conditions during operation.
- Overheating transmission fluid – A restricted or collapsed hose pipe impedes flow to the cooler, causing the oil temperature to spike above safe thresholds, triggering warning lamps.
- Contaminated oil aeration – Suction-side leaks allow air ingress into the hydraulic circuit, producing foamy oil that reduces lubrication efficiency and accelerates wear on bearings and seals.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0501.223.098 |
| OEM Reference | ZF 0501.223.098 |
| Material | Reinforced synthetic rubber with textile braid |
| Inner Diameter | 12 mm (nominal) |
| Outer Diameter | 20 mm (nominal) |
| Overall Length | 380 mm |
| Weight | 0.15 kg |
| Operating Pressure | Up to 15 bar |
| Temperature Range | -40°C to +120°C |
| Fitting Type | Push-on with O-ring seal |
Compatibility
This hose pipe is primarily designed for the ZF WG 65 Series, but it also fits several other ZF powershift transmissions that share the same hydraulic circuit architecture. Compatible models include the WG65, WG80, WG120, WG150, WG180, and WG200 series, provided the transmission uses the standard oil cooler loop configuration. Always verify the routing against the 0636011038 HEXAGON SCREW and 0636011118 HEXAGON SCREW mounting points on the housing. For installations requiring additional fastening, the 0636016015 HEXAGON SCREW is often used to secure the hose clamp bracket.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616101065 | TRANSMISSION HOUSING | Main structural casing that encloses all rotating and hydraulic components |
| 0636011038 | HEXAGON SCREW | Secures the hose pipe bracket to the housing |
| 0636011118 | HEXAGON SCREW | Mounts the cooler line clamp to the transmission |
| 0636016015 | HEXAGON SCREW | Fastens the hose pipe retaining plate |
| 0631306085 | CYLINDRICAL PIN | Aligns the hose pipe connector to the housing bore |
| 0634313118 | O-RING | Seals the hose pipe end fitting against leakage |
| 0636304019 | SCREW PLUG | Closes unused hydraulic ports on the housing |
| 0634801152 | SEALING RING | Provides a static seal under the screw plug |
| 0732611049 | FILTER INSERT | Traps debris in the oil return line before the cooler |
| 0634303718 | O-RING | Seals the filter housing cap |
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