Overview
The ZF 4642.221.147 SUCTION TUBE is a critical hydraulic component engineered specifically for the WG150 transmission series. This OEM genuine part, identified by SKU 4642.221.147, serves as the primary conduit for drawing transmission fluid from the sump to the pump. Positioned within the lower valve body assembly, it ensures a consistent, uninterrupted flow of oil to lubricate gears, clutches, and bearings. Without this tube, the transmission cannot maintain proper hydraulic pressure, leading to immediate operational failure. It is manufactured to ZF’s exacting tolerances, guaranteeing a leak-free seal and long service life in heavy-duty industrial applications.
Symptoms of Failure
When the ZF 4642.221.147 suction tube deteriorates, operators often notice these specific failure indicators:
- Low hydraulic pressure and gear slipping: A cracked or clogged tube restricts oil flow, causing the transmission to slip under load, especially during uphill climbs or heavy towing.
- Visible oil leaks near the transmission pan: Cracks in the tube or at its O-ring seal allow ATF to escape, leaving puddles under the vehicle and requiring frequent top-offs.
- Whining or cavitation noise from the pump: Air ingestion through a damaged suction tube creates a high-pitched whine, indicating the pump is struggling to draw fluid.
- Erratic shifting or delayed engagement: Insufficient oil volume leads to slow clutch pack engagement, causing harsh or unpredictable gear changes.
Technical Specifications
| Specification | Detail |
|---|---|
| OEM Part Number | 4642.221.147 |
| Material | Aluminum alloy with corrosion-resistant coating |
| Length (approx.) | 285 mm |
| Inner Diameter | 18 mm |
| Weight | 0.35 kg |
| Seal Type | Integrated O-ring (included) |
| Compatible Fluid | ZF TE-ML 04 or 05 approved ATF |
Compatibility
While primarily designed for the WG150 series, the 4642.221.147 suction tube is also compatible with select ZF WG transmission models that share the same hydraulic architecture. This includes the WG180, WG200, and early WG250 variants. Always verify your transmission’s serial number against the OEM parts list before installation. For complete assembly, this tube integrates with the 4642101109: TRANSMISSION HOUSING and the 4642301205: TRANSMISSION HOUSING to form a sealed oil circuit. Additionally, the 0730365125: TYPE PLATE identifies the exact model variant, while the 0631311009: GROOVED STUD secures the tube to the pump housing.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101109 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4642301205 | TRANSMISSION HOUSING | Secondary housing for valve body |
| 0730365125 | TYPE PLATE | Identification tag for model specs |
| 0631311009 | GROOVED STUD | Fastener for suction tube mounting |
| 4642301168 | SCREEN SHEET | Fine mesh filter for oil intake |
| 4642301169 | SCREEN SHEET | Coarse mesh pre-filter |
| 0636100621 | HEXAGON SCREW | Mounting bolt for housing |
| 4642301186 | SCREEN SHEET | Secondary filter element |
| 4644106300 | SHIFT SYSTEM | Manual/auto shift control assembly |
| 4644306500 | COVER PLATE | Protective cover for valve body |
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