Overview
The ZF 0730.304.930 ADJUSTMENT PLATE is a precision-machined shim component engineered for the internal clutch pack and planetary gear assemblies within ZF heavy-duty powershift transmissions. This OEM genuine part, identified by SKU 0730.304.930, functions as a critical spacer that establishes the correct end-play and preload tolerances for rotating elements. Located between the main housing and the clutch drum stack, it ensures that hydraulic pressure is evenly distributed and that gear engagement remains within factory specifications. Without this plate, the transmission cannot maintain the precise axial clearance required for smooth shifting under load in construction machinery.
Symptoms of Failure
- Delayed or harsh gear engagement: When the adjustment plate wears or deforms, clutch pack clearance increases, causing a noticeable lag or jarring shift when moving from neutral to forward or reverse.
- Intermittent transmission slipping under load: Operators may experience power loss during uphill travel or when digging, as the worn plate allows the clutch discs to separate prematurely.
- Metallic debris in transmission fluid: A failing adjustment plate can shed fine metal particles into the oil, often detected during routine filter inspections or oil analysis.
- Abnormal driveline vibration: Excessive axial play from a collapsed plate creates low-frequency vibrations that are felt through the chassis at specific RPM ranges.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0730.304.930 |
| Material | Case-hardened steel (C45E +HC) |
| Outer Diameter | 185 mm |
| Inner Diameter | 125 mm |
| Thickness | 3.2 mm (selective fit) |
| Weight | 0.42 kg |
| Surface Finish | Ground, Ra ≤ 0.8 µm |
| OEM Reference | ZF 0730.304.930 |
Compatibility
This adjustment plate is primarily used in ZF WG180, WG200, and WG211 series powershift transmissions commonly found in wheel loaders, graders, and telehandlers. It also fits select Ergopower and Ecomix drivelines used in concrete mixer trucks. For proper installation, this plate must be paired with the correct 2098117002: HOUSING and secured using the 0636103300: STUD along with a 0637101164: HEXAGON NUT. The entire assembly is sealed by the 2098301052: REAR AXLE HOUS. which must be inspected for cracks during any rebuild.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2098117002 | HOUSING | Main transmission casing that contains the clutch assembly |
| 2098301052 | REAR AXLE HOUS. | Rear driveline housing supporting output shaft bearings |
| 0636103300 | STUD | Threaded fastener for securing adjustment plate to housing |
| 0637101164 | HEXAGON NUT | Locking nut for stud retention |
| 0636102566 | STUD | Alternate-length stud for variant assemblies |
| 0636100960 | STUD | Short stud for auxiliary flange mounting |
| 0637101167 | HEXAGON NUT | M10 lock nut for secondary fastening points |
| 0634303044 | O-RING | Hydraulic seal between plate and clutch drum |
| 2098317013 | BRAKE HOUSING | Left-side brake drum housing for parking brake |
| 2098317028 | BRAKE HOUSING | Right-side brake drum housing for service brake |
