Overview
The ZF 0730.107.806 SUPPORTING RING is a precision-engineered OEM genuine component designed specifically for the WG 65 series transmission. This supporting ring functions as a critical load-bearing spacer within the planetary gear set, maintaining correct axial alignment and preventing unwanted movement of adjacent rotating assemblies. Installed directly behind the 4616105413: OUTPUT shaft assembly, the SKU 0730.107.806 ensures that the entire drivetrain remains stable under high-torque conditions. Without this ring, the internal clearances would shift, leading to accelerated wear on surrounding components such as the 4616203017: OUTPUT FLANGE and the 4616101117: TRANSMISSION HOUSING.
Symptoms of Failure
When the ZF 0730.107.806 supporting ring begins to degrade, operators will notice distinct performance issues. Oil leaks around the output shaft seal are common, as a worn ring allows the shaft to wobble, breaking the seal. Gear slipping under load occurs because the planetary gears lose their precise spacing, causing intermittent engagement. Metallic grinding noises from the transmission housing indicate that the ring has fractured or flattened, allowing metal-on-metal contact. Finally, vibration during acceleration is a telltale sign that the supporting ring can no longer dampen axial thrust forces, directly affecting the 0636011038: HEXAGON SCREW fasteners that secure the assembly.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number / SKU | 0730.107.806 |
| Material | Case-hardened alloy steel |
| Outer Diameter | 145 mm (estimated) |
| Inner Diameter | 110 mm (estimated) |
| Thickness | 8.5 mm (estimated) |
| Weight | 0.35 kg (estimated) |
| OEM Reference | ZF 0730.107.806 |
| Surface Treatment | Zinc-phosphate coating |
Compatibility
This supporting ring is engineered for the ZF WG 65 series transmissions, including models such as the WG65, WG80, WG120, WG150, WG180, and WG200. It is also compatible with certain off-highway and industrial variants that share the same planetary carrier architecture. Always verify the part number 0730.107.806 against your transmission’s parts manual before installation. For a complete rebuild, consider pairing this ring with a new 0636016015: HEXAGON SCREW and 0631306085: CYLINDRICAL PIN to ensure proper torque retention.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616105413 | OUTPUT | Transfers rotational force from the gearset to the driveline |
| 4616203017 | OUTPUT FLANGE | Connects the output shaft to the universal joint |
| 4616101117 | TRANSMISSION HOUSING | Encloses and supports all internal rotating components |
| 0636011038 | HEXAGON SCREW | Secures the supporting ring to the carrier |
| 0636016015 | HEXAGON SCREW | Fastens the output flange to the shaft |
| 0631306085 | CYLINDRICAL PIN | Aligns the supporting ring during assembly |
| 0634313118 | O-RING | Seals the interface between the housing and the output flange |
| 0732611049 | FILTER INSERT | Captures debris from the hydraulic circuit |
| 0634303718 | O-RING | Prevents oil leakage around the filter housing |
| 0636610082 | STUD | Provides threaded mounting points for the housing cover |
