Overview
The ZF 0501.209.980 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 clutch pack assembly, ensuring precise shift timing and lubrication. The SKU 0501.209.980 is manufactured to ZF’s exacting tolerances, featuring a reinforced synthetic rubber core with braided textile layers to withstand continuous exposure to ATF temperatures up to 150°C. Without this hose pipe, the transmission cannot maintain the hydraulic pressure required for gear engagement. It works in concert with the 4616105415: OUTPUT shaft and the 4616303144: OUTPUT FLANGE to deliver torque smoothly from the converter to the driveline.
Symptoms of Failure
- Hydraulic fluid seepage at the transmission bell housing: A cracked or swollen 0501.209.980 hose pipe will allow ATF to weep onto the 4616101094: TRANSMISSION HOUSING, leaving visible puddles under the vehicle after shutdown.
- Erratic or delayed gear engagement: When the hose pipe collapses internally, hydraulic pressure drops, causing a 2–3 second lag when shifting from Neutral to Drive or Reverse.
- Burning odor from overheated transmission fluid: Restricted flow through a degraded hose pipe reduces cooler circulation, leading to fluid oxidation and a distinct burnt smell.
- Whining noise during acceleration: Air ingestion through a cracked hose pipe creates cavitation in the pump, producing a high-pitched whine that increases with engine RPM.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 0501.209.980 |
| OEM Reference | ZF 0501.209.980 |
| Material | Reinforced synthetic rubber (NBR) with textile braid |
| Inner Diameter | 12.7 mm (0.5 in) |
| Outer Diameter | 21.3 mm (0.84 in) |
| Overall Length | 380 mm (14.96 in) |
| Weight | 0.18 kg (0.4 lbs) |
| Max Working Pressure | 18 bar (261 psi) |
| Temperature Range | -40°C to +150°C |
Compatibility
This ZF hose pipe is primarily designed for the WG 65 Series transmission family, including models WG65, WG65-2, and WG65-3. It also fits select variants of the WG180 and WG200 series when used in off-highway applications such as forklifts and wheel loaders. The 0501.209.980 replaces earlier part numbers 0501.208.970 and 0501.210.981. Always verify the routing path against your existing assembly; the hose pipe connects directly to the valve body and routes past the 0636011038: HEXAGON SCREW mounting points on the housing flange.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616105415 | OUTPUT | Transfers torque from planetary gears to driveline |
| 4616303144 | OUTPUT FLANGE | Connects output shaft to driveshaft yoke |
| 4616101094 | TRANSMISSION HOUSING | Encloses gear train and hydraulic circuits |
| 0636011038 | HEXAGON SCREW | Secures housing cover to main case |
| 0636011118 | HEXAGON SCREW | Fastens valve body to housing |
| 0636016015 | HEXAGON SCREW | Mounts oil pan to transmission |
| 0631306085 | CYLINDRICAL PIN | Aligns clutch pack during assembly |
| 0634313118 | O-RING | Seals hose pipe connection to valve body |
| 0732611049 | FILTER INSERT | Traps debris in hydraulic circuit |
| 0634303718 | O-RING | Seals output flange to housing |
