Overview
The ZF 4616.221.047 TUBE is a genuine OEM hydraulic fluid conduit engineered specifically for the WG 65 series transmission. This precision-machined tube directs pressurized oil between the valve body and the clutch pack assembly, ensuring consistent lubrication and shift pressure. As part of the internal lubrication circuit, it works in concert with the 4616105413 OUTPUT and the 4616101117 TRANSMISSION HOUSING to maintain proper fluid flow. The SKU 4616.221.047 is the direct replacement for the original factory-installed tube, guaranteeing exact fit and material compatibility.
Symptoms of Failure
- Hydraulic fluid seepage at the tube-to-housing interface: A worn or cracked tube often causes slow oil drips, visible as wet spots under the transmission bell housing.
- Delayed or harsh gear engagement: When the tube loses pressure integrity, the clutch packs receive insufficient fluid, leading to slipping during 2-3 shifts.
- Erratic shift timing under load: A deformed tube can cause intermittent pressure drops, resulting in unpredictable shift points during heavy hauling.
- Contaminated transmission fluid: Internal tube fractures may allow debris into the oil circuit, accelerating wear on the 0636011038 HEXAGON SCREW and adjacent seals.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4616.221.047 |
| Material | Seamless drawn steel, zinc-plated |
| Overall Length | 185 mm (estimated) |
| Outer Diameter | 12 mm |
| Wall Thickness | 1.5 mm |
| Weight | 0.12 kg |
| OEM Reference | ZF 4616.221.047 |
| Sealing Method | Compression fit with O-ring groove |
Compatibility
This tube is primarily designed for the WG 65 series, but it also fits select ZF WG180 and WG200 models that share the same hydraulic circuit architecture. Always verify fitment using the original transmission serial number. The tube interfaces directly with the 4616203017 OUTPUT FLANGE and requires the 0636011038 HEXAGON SCREW for secure mounting. For complete assembly, confirm compatibility with the 4616101117 TRANSMISSION HOUSING.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616105413 | OUTPUT | Transfers torque from transmission to driveshaft |
| 4616203017 | OUTPUT FLANGE | Connects output shaft to driveline components |
| 4616101117 | TRANSMISSION HOUSING | Main structural casing for gear and valve assembly |
| 0636011038 | HEXAGON SCREW | Fastens tube and flange to housing |
| 0636016015 | HEXAGON SCREW | Secondary mounting bolt for output flange |
| 0631306085 | CYLINDRICAL PIN | Alignment dowel for housing and flange |
| 0634313118 | O-RING | Seals tube-to-housing connection |
| 0732611049 | FILTER INSERT | Traps contaminants in hydraulic circuit |
| 0634303718 | O-RING | Seals output flange interface |
| 0636610082 | STUD | Threaded rod for housing alignment |
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