Overview
The ZF 0730.300.825 SPACER RING is a precision-engineered OEM genuine component designed specifically for the WG 200 Series transmission family. This critical spacer ring sits between the planetary gear set and the clutch housing assembly, maintaining exact axial clearance to ensure proper gear engagement and hydraulic pressure distribution. The SKU 0730.300.825 is manufactured to ZF’s original tolerances, guaranteeing a perfect fit within the WG200’s complex rotating assembly. Without this spacer, the transmission’s internal components cannot maintain the precise alignment required for smooth power transfer under heavy load conditions.
Symptoms of Failure
- Oil leaks around the transmission housing: A worn 0730.300.825 spacer ring can cause misalignment, leading to seal failure and hydraulic fluid seepage from the WG200’s main casing.
- Gear slipping under load: When the spacer ring loses its dimensional integrity, axial play increases, resulting in delayed clutch pack engagement and intermittent power loss during acceleration.
- Abnormal metallic grinding noises: A degraded spacer ring allows metal-on-metal contact between the gear set and housing, producing a distinct grinding sound that worsens with transmission temperature rise.
- Erratic shifting patterns: Worn axial clearance from a failing spacer ring disrupts the hydraulic control system, causing harsh or delayed shifts in the WG200 series.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 0730.300.825 |
| Material | Case-hardened steel (DIN 1.7131) |
| Outer Diameter | 82.5 mm |
| Inner Diameter | 68.0 mm |
| Thickness | 3.2 mm |
| Weight | 0.045 kg |
| OEM Reference | ZF 0730.300.825 |
| Surface Finish | Ground & phosphated |
Compatibility
This OEM genuine spacer ring is engineered for the ZF WG200 series transmissions, including the WG180, WG200, and WG210 models commonly found in medium-duty trucks, buses, and off-highway equipment. The 0730.300.825 part is also compatible with select ZF Ecolife and Ecomat variants that share the WG200’s planetary carrier architecture. For proper installation, this spacer ring is typically paired with the 4460165051 CONSOLE and the 4460368311 CONSOLE, which secure the spacer in the clutch housing. Additionally, the 0636011429 HEXAGON SCREW and 0730100365 WASHER are required for fastening the assembly to the transmission case.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4460165051 | CONSOLE | Housing support for spacer ring alignment |
| 4460368311 | CONSOLE | Secondary housing bracket for axial retention |
| 0636011429 | HEXAGON SCREW | Fastener for console-to-case mounting |
| 0730100365 | WASHER | Load distribution under hexagon screw head |
| 4644105418 | DISCONNECTION | Clutch pack disconnection mechanism |
| 4644305041 | ADAPTER | Interface between spacer ring and gear set |
| 4460068159 | AXLE DRIVE | Power take-off drive shaft component |
| 4460168651 | INPUT FLANGE | Torque input connection from engine |
| 4460368318 | FLANGE | Output flange for driveline attachment |
| 4460368317 | DUST PROTECTION | Seal guard for contamination prevention |
