Overview
The ZF 4616.305.073 RING is a precision-engineered sealing component designed for the WG65 series of heavy-duty automatic transmissions. This OEM genuine part sits within the clutch pack or planetary gearset assembly, functioning as a critical static seal to prevent fluid bypass between rotating and stationary elements. By maintaining proper hydraulic pressure, the 4616.305.073 RING ensures consistent gear engagement and lubrication flow. The SKU 4616.305.073 is manufactured to ZF’s exacting tolerances, making it a direct replacement for worn rings in WG65 transmissions used in construction, mining, and municipal vehicles.
Symptoms of Failure
- Erratic gear engagement or delayed shifting: A worn 4616.305.073 RING allows hydraulic fluid to leak past the seal, reducing clutch pack pressure and causing hesitation when shifting between forward and reverse gears.
- Transmission fluid leaks near the housing joint: When the ring degrades, oil can seep from the interface between the TRANSMISSION HOUSING and the valve body, leaving visible drips under the vehicle.
- Overheating transmission due to low fluid level: Internal leakage from a failing ring reduces overall system pressure, leading to insufficient lubrication and elevated operating temperatures.
- Whining or grinding noises from the gearbox: As the ring loses its sealing integrity, metal-on-metal contact can occur within the clutch drum, producing audible distress sounds during acceleration.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4616.305.073 |
| Material | Nitrile rubber (NBR) with steel reinforcement |
| Inner Diameter | 68.5 mm (estimated) |
| Outer Diameter | 76.2 mm (estimated) |
| Thickness | 3.5 mm (estimated) |
| Weight | 0.02 kg |
| OEM Reference | ZF 4616.305.073 |
Compatibility
This ring is specifically engineered for the ZF WG65 series of powershift transmissions. Based on its design and sealing profile, the 4616.305.073 RING is compatible with the following ZF models: WG65, WG80, WG100, and WG120. It is commonly used in off-highway vehicles such as wheel loaders, dump trucks, and graders. For proper installation, the ring must be paired with the correct HEXAGON SCREW (M8 x 20) and HEXAGON SCREW (M10 x 30) to secure the housing. Additionally, the HEXAGON SCREW (M12 x 35) is used for final assembly torque.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616101089 | TRANSMISSION HOUSING | Encloses the gear train and supports all internal components |
| 0636011038 | HEXAGON SCREW | M8 fastener for securing valve body to housing |
| 0636011118 | HEXAGON SCREW | M10 fastener for clutch drum retention |
| 0636016015 | HEXAGON SCREW | M12 fastener for main housing bolts |
| 0631306085 | CYLINDRICAL PIN | Aligns housing and valve body during assembly |
| 0634313118 | O-RING | Seals the oil pump inlet port |
| 0636304019 | SCREW PLUG | Closes pressure test ports |
| 0634801152 | SEALING RING | Prevents leaks at the output shaft flange |
| 0732611049 | FILTER INSERT | Traps debris in the hydraulic circuit |
| 0634303718 | O-RING | Seals the filter housing cover |
Authorized ZF Distributor
We are a certified supplier of genuine ZF components.
