Overview
The ZF 4646.302.139 OIL FEED FLANGE is a precision-engineered component designed for the WG 310 Series transmission. This OEM genuine part serves as the critical interface for directing pressurized hydraulic fluid from the transmission housing to the rotating clutch and gear assemblies. Positioned between the main casing and the valve body, the oil feed flange ensures consistent lubrication and cooling flow, which is essential for maintaining optimal operating temperatures and preventing premature wear. The SKU 4646.302.139 is manufactured to ZF’s exacting tolerances, guaranteeing a leak-free seal and reliable oil distribution under high-pressure conditions. When replacing this flange, it is common to also inspect the TRANSMISSION HOUSING for cracks or distortion, as both components work in tandem to maintain system integrity.
Symptoms of Failure
- External oil leaks near the transmission bell housing: A worn or cracked OIL FEED FLANGE often results in visible fluid seepage around the flange mating surface, leading to low transmission fluid levels and potential overheating.
- Erratic gear engagement or slipping under load: When the flange fails to deliver consistent oil pressure, clutch packs may not engage fully, causing delayed shifts or slipping during acceleration.
- Increased operating temperature and burnt fluid smell: Restricted oil flow due to a deformed flange can starve bearings and gears of lubrication, generating excessive heat and degrading transmission fluid.
- Whining or grinding noises from the transmission: Insufficient oil supply to the rotating assembly creates metal-on-metal contact, producing audible whining or grinding sounds that worsen over time.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4646.302.139 |
| Material | Aluminum alloy with anodized coating |
| Weight | 0.85 kg (1.87 lbs) |
| Overall Length | 145 mm |
| Overall Width | 90 mm |
| Bolt Hole Pattern | 4 x M8 on 72 mm PCD |
| O-Ring Groove Diameter | 38 mm |
| OEM Reference | ZF 4646.302.139 |
Compatibility
This OIL FEED FLANGE is engineered specifically for the ZF WG 310 Series transmission family. Based on its design and port configuration, it is also compatible with the following ZF models: WG180, WG200, WG250, and WG300. These transmissions are commonly found in heavy-duty commercial vehicles, construction equipment, and agricultural machinery. For proper installation, ensure the mating surfaces on the HOUSING are clean and free of debris. Use new 螺栓 (bolts) and CAP SCREW fasteners to achieve the correct torque specification of 25 Nm.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4646101167 | TRANSMISSION HOUSING | Main casing that encloses all internal components |
| 4646301317 | HOUSING | Intermediate support structure for valve body |
| 0636115293 | 螺栓 | M8 hex bolt for flange attachment |
| 0636101153 | CAP SCREW | Socket head cap screw for high-torque applications |
| 4646201003 | POT | Oil sump or reservoir component |
| 0736300232 | 螺栓 | M10 bolt for housing assembly |
| 4646164011 | CONTROL UNIT | Electronic module for shift timing |
| 4644306424 | GEAR SHIFT HOUSING | Enclosure for shift forks and actuators |
| 4644306427 | GASKET | Sealing ring between housing and flange |
| 0732042025 | COMPRESSION SPRING | Provides preload for valve return |
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