Overview
The ZF 0730.104.238 WASHER is a precision-engineered OEM genuine component designed to function as a critical sealing and load-distribution interface within heavy-duty construction machinery transmissions. This hardened steel washer sits between the transmission housing and hydraulic control assemblies, preventing fluid bypass and maintaining correct axial clearances. The SKU 0730.104.238 is specifically manufactured to ZF’s exacting tolerances, ensuring a proper fit when paired with adjacent components such as the 4143101009: HOUSING and the 4143301025: HOUSING. Without this washer, internal pressures cannot be reliably maintained, leading to premature wear of the entire gear train.
Symptoms of Failure
When the ZF 0730.104.238 WASHER degrades or becomes crushed, operators will notice distinct performance issues. Look for these specific failure symptoms:
- Transmission fluid seepage at housing joints – A worn washer allows oil to escape past the 0634313603: O-RING, creating visible drips on the bell housing.
- Intermittent gear slippage under load – Loss of clamping force causes clutch packs to momentarily lose pressure, especially during heavy excavation.
- Metallic debris in the oil pan – A collapsed washer can shed material, contaminating the hydraulic circuit and damaging the 4475280018: SCREW PLUG sealing surface.
- Increased shift shock or delayed engagement – Incorrect washer thickness alters valve body clearances, leading to harsh or sluggish gear changes.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0730.104.238 |
| Material | Hardened Carbon Steel (DIN 1.0402) |
| Outer Diameter | 38.0 mm |
| Inner Diameter | 24.5 mm |
| Thickness | 2.5 mm |
| Weight | 12 grams |
| OEM Reference | ZF 0730.104.238 |
| Surface Finish | Phosphate coated |
Compatibility
This washer is a standard component in ZF’s WG series powershift transmissions used in construction machinery. It is commonly found in the WG180, WG200, and WG210 models, where it secures the valve body cover to the main housing. The 0730.104.238 also appears in certain ZF 4WG-200 and 6WG-200 variants. Always verify fitment by cross-referencing your transmission serial number, as housing designs vary between the 4143101009: HOUSING and 4143301025: HOUSING assemblies.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4143101009 | HOUSING | Main transmission casing |
| 4143301025 | HOUSING | Clutch housing cover |
| 0634313603 | O-RING | Seals washer-to-housing interface |
| 4475280018 | SCREW PLUG | Closes hydraulic test ports |
| 0501342341 | SUPPORT RING | Backs up O-ring seal |
| 4143298457 | SEAL KIT | Complete overhaul gasket set |
| 0634313591 | O-RING | Secondary seal for valve body |
| 0636101068 | CAP SCREW | Fastens housing to transmission |
| 4143221013 | THROTTLE VALVE | Modulates shift pressure |
| 0634304484 | O-RING | Seals throttle valve bore |
