Overview
The ZF 4646.101.487 TRANSMISSION HOUSING is a precision-engineered OEM sub-assembly designed for the WG 250, WG 260, and WG 310 series transmissions. This structural component serves as the central casing that encloses the gear train, clutch packs, and hydraulic valve body, ensuring correct alignment and protection from contaminants. As a direct replacement for the original factory unit, the SKU 4646.101.487 restores the transmission’s structural integrity and oil containment. This housing interfaces directly with the main drive shaft and planetary gear sets, making it a critical element for torque transfer and system rigidity.
Symptoms of Failure
- External oil seepage around the bell housing: Cracks or porosity in the casting allow transmission fluid to escape, leading to low fluid levels and eventual overheating.
- Gear engagement hesitation or slipping: Warpage or internal scoring disrupts the precise alignment of clutch packs, causing delayed shifts or power loss under load.
- Unusual metallic grinding noises: Bearing bore wear within the housing permits shaft misalignment, resulting in audible contact between rotating components.
- Persistent fluid contamination: Internal fractures can allow debris to circulate, accelerating wear on seals and valves throughout the assembly.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4646.101.487 |
| Material | High-grade aluminum alloy (A356-T6) |
| Overall Length | 485 mm |
| Overall Width | 320 mm |
| Overall Height | 295 mm |
| Weight | 14.2 kg |
| OEM Reference | ZF 4646.101.487 |
| Bolt Torque Spec | 85 Nm (M10 bolts) |
Compatibility
This transmission housing is engineered for the ZF WG 250, WG 260, and WG 310 series. It is also compatible with earlier WG 180 and WG 200 variants when used with the correct adapter kit. The housing fits both standard and heavy-duty configurations found in agricultural tractors, construction loaders, and industrial material handlers. Always verify bell housing bolt patterns and input shaft spline count before installation.
Installation Notes
When replacing the housing, always install new sealing elements. Use the 0636115293 螺栓 and 0736300232 螺栓 to secure the housing to the engine bell housing. The 4475280208 SCREW PLUG must be torqued to 35 Nm to prevent oil weepage. Additionally, replace the 0634316523 O-RING on the input shaft bore to guarantee a leak-free seal. These fasteners and seals are critical for maintaining clamp load and fluid containment under high-pressure operation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 0636115293 | 螺栓 | Housing-to-engine mounting bolt |
| 0736300232 | 螺栓 | Bell housing flange bolt |
| 4475280208 | SCREW PLUG | Oil drain port plug |
| 0634316523 | O-RING | Input shaft seal ring |
| 0501316470 | BREATHER | Pressure equalization vent |
| 4646201021 | BREATHER | Alternate vent assembly |
| 4646101484 | TRANSMISSION HOUSING | Alternate housing variant |
| 0634313070 | O-RING | Cover plate seal |
| 4646121416 | OIL PIPE | Internal lubrication tube |
| 4475280232 | UNION SCREW | Hydraulic line connector |
Authorized ZF Distributor
We are a certified supplier of genuine ZF components.
