Overview
The ZF 0501.209.976 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 cooler circuit, ensuring consistent lubrication and thermal regulation within the gear train. The SKU 0501.209.976 is precision-formed to withstand high-pressure pulses and thermal cycling, directly supporting shift quality and clutch pack longevity. When installed alongside a robust 4616101089: TRANSMISSION HOUSING, this hose pipe maintains the sealed integrity of the hydraulic loop, preventing contamination ingress and pressure loss.
Symptoms of Failure
- External hydraulic oil leaks near the cooler line connection: A cracked or swollen hose pipe 0501.209.976 often drips ATF fluid, leaving visible puddles under the vehicle and causing gradual fluid loss.
- Erratic gear engagement or delayed shifts: When this hose pipe develops internal delamination, it restricts oil flow, leading to insufficient clutch pressure and harsh or slipping shifts during load changes.
- Overheating transmission with elevated sump temperatures: A collapsed or kinked hose pipe reduces cooler circuit flow, preventing proper heat exchange and triggering thermal warning codes in the TCU.
- Whining or cavitation noise from the pump: Air ingestion through a deteriorated hose pipe creates aerated fluid, producing audible pump noise and reducing hydraulic efficiency.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 0501.209.976 |
| Material | Reinforced synthetic rubber with braided textile layer |
| Inner Diameter | 12.7 mm (0.5 in) |
| Outer Diameter | 19.0 mm (0.75 in) |
| Overall Length | 410 mm (16.1 in) |
| Operating Pressure | Up to 18 bar (261 psi) |
| Temperature Range | -40°C to +150°C (-40°F to +302°F) |
| OEM Reference | ZF 0501.209.976 |
| Net Weight | 0.18 kg (0.40 lb) |
Compatibility
This hose pipe is primarily designed for the ZF WG 65 Series, but it also fits select WG180, WG200, and WG250 transmissions that share the same cooler circuit architecture. The 0501.209.976 is commonly used in off-highway vehicles, mobile cranes, and heavy-duty trucks equipped with ZF Ecomat or Ecolife derivatives. Always verify the routing and fitting orientation against your specific transmission model. For secure mounting, pair this hose with the correct 0636011038: HEXAGON SCREW and 0636011118: HEXAGON SCREW fasteners, and ensure the 0636016015: HEXAGON SCREW is torqued to specification for leak-free operation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616101089 | TRANSMISSION HOUSING | Encloses and supports all internal gear and valve assemblies |
| 0636011038 | HEXAGON SCREW | Secures hose pipe brackets and cooler line clamps |
| 0636011118 | HEXAGON SCREW | Fastens transmission housing to bell housing |
| 0636016015 | HEXAGON SCREW | Mounts valve body and oil pan assembly |
| 0631306085 | CYLINDRICAL PIN | Aligns housing halves during assembly |
| 0634313118 | O-RING | Seals hose pipe end connections |
| 0636304019 | SCREW PLUG | Closes unused cooler ports |
| 0634801152 | SEALING RING | Provides leak-proof seal under screw heads |
| 0732611049 | FILTER INSERT | Traps debris in the hydraulic circuit |
| 0634303718 | O-RING | Seals filter housing and cooler line junctions |
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