Overview
The ZF 0730.304.938 ADJUSTMENT PLATE is a precision-machined shim component engineered for critical clearance regulation within heavy-duty ZF powershift transmissions. Positioned between the clutch pack and the housing assembly, this OEM genuine part ensures correct axial play for optimal gear engagement. The SKU 0730.304.938 is specifically designed to maintain hydraulic pressure balance and prevent metal-on-metal contact during high-torque operations in construction machinery. Without this plate, the transmission’s internal tolerances drift, leading to premature wear on adjacent components like the 2098117002: HOUSING and the 2098301052: REAR AXLE HOUS..
Symptoms of Failure
- Delayed gear engagement under load: When the adjustment plate wears beyond tolerance, clutch packs fail to compress fully, causing a noticeable lag when shifting from neutral to drive in wheel loaders or dozers.
- Intermittent transmission shudder: A worn 0730.304.938 plate creates uneven clamping force, producing vibration during low-speed maneuvering—a common symptom in ZF WG series transmissions.
- Hydraulic oil contamination: As the plate degrades, metallic debris enters the oil circuit, often clogging the filter and accelerating failure of the 0634303044: O-RING seals.
- Audible grinding from the bell housing: Excessive axial play allows the clutch hub to contact the 2098317013: BRAKE HOUSING, producing a distinct metallic scraping sound during operation.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 0730.304.938 |
| Material | Case-hardened steel (DIN 1.7131) |
| Outer Diameter | 148.5 mm |
| Inner Diameter | 82.0 mm |
| Thickness | 2.50 mm ± 0.05 mm |
| Weight | 0.34 kg |
| Surface Finish | Ground, Ra ≤ 0.8 µm |
| OEM Reference | ZF 0730.304.938 |
Compatibility
This adjustment plate is a direct fit for ZF powershift transmissions commonly used in construction machinery, including the WG180, WG200, and WG250 series. It also applies to the 4WG-200 and 6WG-250 variants found in excavators and telehandlers. Always verify the stack height when replacing this plate; pairing it with a new 0636103300: STUD and 0637101164: HEXAGON NUT ensures proper torque retention. For models using a different brake configuration, cross-reference with the 2098317028: BRAKE HOUSING to confirm fitment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2098117002 | HOUSING | Encloses clutch and planetary gear sets |
| 2098301052 | REAR AXLE HOUS. | Supports final drive output shaft |
| 0636103300 | STUD | Secures adjustment plate to housing |
| 0637101164 | HEXAGON NUT | Locks stud in place against vibration |
| 0636102566 | STUD | Alternate length for thicker plate stacks |
| 0636100960 | STUD | Short stud for auxiliary mounting points |
| 0637101167 | HEXAGON NUT | Flanged nut for high-torque applications |
| 0634303044 | O-RING | Seals hydraulic passages near adjustment plate |
| 2098317013 | BRAKE HOUSING | Houses wet brake discs for WG200 series |
| 2098317028 | BRAKE HOUSING | Brake housing variant for 6WG-250 models |
