Overview
The ZF 4646.121.417 TUBO DE ACEITE (Oil Tube) is a critical hydraulic conduit within the WG 250, WG 260, and WG 310 series transmissions. This OEM subassembly directs pressurized lubricating oil from the pump to the rotating clutch packs and planetary gear sets. Positioned inside the main transmission housing, this tube ensures consistent oil flow to prevent overheating and premature wear. The SKU 4646.121.417 is precision-engineered to maintain correct oil pressure, directly supporting gear engagement and torque conversion in heavy construction machinery.
Symptoms of Failure
- Visible oil leaks around the transmission bell housing: A cracked or corroded 4646.121.417 tube often causes external seepage, leaving puddles under the equipment.
- Delayed or harsh gear engagement: When the oil tube fails to deliver adequate pressure, operators experience sluggish shifting or sudden clunks during acceleration.
- Overheating transmission fluid: Restricted oil flow from a damaged tube leads to elevated temperatures, triggering warning lights or thermal shutdown.
- Low transmission oil pressure warnings: Internal cracks in the tube cause pressure drops, activating dashboard alerts and reducing clutch holding capacity.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4646.121.417 |
| Material | Steel with corrosion-resistant coating |
| Length | ~320 mm (estimated) |
| Outer Diameter | ~18 mm |
| Weight | ~0.45 kg |
| OEM Reference | ZF 4646.121.417 |
| Fluid Type | ZF TE-ML 03/05/07 compatible |
Compatibility
This oil tube is designed for ZF WG series powershift transmissions used in wheel loaders, graders, and dump trucks. It directly fits the following models:
- ZF WG 250
- ZF WG 260
- ZF WG 310
It may also be compatible with earlier WG 180 and WG 200 variants, though verification of the TRANSMISSION HOUSING dimensions is recommended. For complete assembly, ensure the HOUSING and COVER are free of debris. The COVER SHEET should also be inspected for warping during installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4646101147 | TRANSMISSION HOUSING | Encloses all internal gears and shafts |
| 4646301318 | HOUSING | Supports clutch and valve body assembly |
| 4646301301 | COVER | Seals the rear transmission section |
| 4646201032 | COVER SHEET | Protects internal components from debris |
| 4646301341 | COVER SHEET | Alternate cover sheet for specific models |
| 0636115293 | 螺栓 | Mounting bolt for housing assembly |
| 0501316470 | BREATHER | Equalizes internal pressure |
| 4646201021 | BREATHER | Alternative breather valve |
| 0736300232 | 螺栓 | Fastener for cover plate |
| 4646164011 | CONTROL UNIT | Electronic shift control module |
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