Overview
The ZF 0730.304.929 ADJUSTMENT PLATE is a precision-machined OEM genuine component engineered for the internal clutch pack and brake assemblies within ZF heavy-duty powershift transmissions. This plate functions as a critical shim or spacer, establishing the exact axial clearance required for proper clutch engagement and disengagement. By maintaining the correct end-play tolerances, the SKU 0730.304.929 ensures that hydraulic pressure is applied evenly across the friction discs, preventing premature wear and torque loss. It is typically seated between the piston housing and the clutch drum, often working in conjunction with the 2098117002: HOUSING to secure the entire rotating assembly. Without this adjustment plate, the transmission cannot achieve the precise clamping force necessary for reliable power transfer in demanding construction machinery applications.
Symptoms of Failure
When the ZF 0730.304.929 adjustment plate becomes worn, warped, or corroded, operators will notice distinct performance issues. Look for these specific failure symptoms to identify a failing adjustment plate:
- Delayed gear engagement or “clutch slip” under load – If the plate has lost its original thickness, the clutch pack clearance increases, causing the transmission to hesitate before engaging forward or reverse gears, especially on inclines.
- Intermittent loss of drive in specific ranges – A warped adjustment plate can cause uneven pressure distribution, leading to a sudden loss of power to the wheels during operation, often misdiagnosed as a hydraulic issue.
- Metallic grinding or “chattering” during shifts – Excessive axial play due to a worn plate allows the clutch discs to impact each other, producing a distinct metallic noise that worsens as the transmission oil heats up.
- Low transmission oil pressure warnings – A deformed adjustment plate can block oil feed passages to the clutch piston, triggering dashboard pressure alerts and potential overheating of the 2098301052: REAR AXLE HOUS. assembly.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number / SKU | 0730.304.929 |
| Material | Case-hardened alloy steel (DIN 1.7131) |
| Outer Diameter | 195.0 mm |
| Inner Diameter | 135.5 mm |
| Thickness (Nominal) | 3.50 mm |
| Surface Finish | Ground, Ra ≤ 0.8 µm |
| Weight | 0.42 kg |
| OEM Reference | ZF 0730.304.929 |
| Hardness | HRC 45-50 |
Compatibility
This adjustment plate is a direct OEM replacement for several ZF powershift transmission families commonly found in wheel loaders, graders, and telehandlers. It is specifically validated for use in the ZF WG180, ZF WG200, and ZF WG210 series. The part also fits select ZF 4WG-200 and ZF 4WG-210 models where the clutch pack configuration requires a 3.50 mm shim. Always verify the existing plate thickness before installation. During reassembly, secure the plate using the 0636103300: STUD and the corresponding 0637101164: HEXAGON NUT to ensure the housing remains properly torqued against the transmission case.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2098117002 | HOUSING | Encloses the clutch drum and supports the adjustment plate |
| 2098301052 | REAR AXLE HOUS. | Houses the final drive and differential assembly |
| 0636103300 | STUD | Threaded rod for securing the housing to the transmission |
| 0637101164 | HEXAGON NUT | Locks the stud in place against the housing |
| 0636102566 | STUD | Alternative length stud for deep housing applications |
| 0636100960 | STUD | Short stud for cover plate mounting |
| 0637101167 | HEXAGON NUT | Flanged nut for vibration-resistant fastening |
| 0634303044 | O-RING | Seals the hydraulic circuit between housing and plate |
| 2098317013 | BRAKE HOUSING | Contains the parking brake piston and discs |
| 2098317028 | BRAKE HOUSING | Alternate brake housing for high-torque variants |
