Overview
The ZF 0730.300.712 WASHER is a precision-engineered OEM genuine component designed for critical load distribution and sealing integrity within heavy-duty ZF transmissions. This hardened steel washer sits between the transmission housing and rotating shaft assemblies, preventing axial play and maintaining correct gear alignment. As part number 0730.300.712, it functions as a thrust washer or spacer in the planetary gear set, ensuring that clamping forces from fasteners are evenly distributed across mating surfaces. In construction machinery applications, this washer works directly with the 2094101019: TRANSMISSION HOUSING and the 0899325353: HOUSING to maintain precise clearances under extreme torque loads.
Symptoms of Failure
- Transmission oil seepage at housing joints – When the 0730.300.712 washer deforms or cracks, it compromises the seal between the 2094298058: HOUSING and adjacent components, leading to visible oil leaks around the transmission case.
- Intermittent gear slipping under load – A worn washer reduces axial preload, allowing planetary gears to shift out of alignment, causing momentary power loss during excavation or grading operations.
- Metallic grinding noise during gear engagement – Thinning of the washer surface permits metal-on-metal contact between the shaft shoulder and the 2094301071: COVER, producing a distinct grinding sound.
- Vibration in the driveline at low RPM – Uneven washer wear creates imbalance in the rotating assembly, transmitting vibration through the transmission housing and into the operator cab.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 0730.300.712 |
| Material | Hardened Carbon Steel (DIN 1.0503 equivalent) |
| Inner Diameter | 30.0 mm |
| Outer Diameter | 42.0 mm |
| Thickness | 2.5 mm |
| Weight | 12 grams |
| Surface Finish | Phosphate coated for corrosion resistance |
| OEM Reference | ZF 0730.300.712 |
| Hardness | HRC 45-50 |
Compatibility
This washer is a standard component in ZF WG180, WG200, and WG210 series power shift transmissions commonly used in wheel loaders, bulldozers, and telehandlers. It also appears in select ZF 4WG-200 and 6WG-200 models where axial thrust management is required. For proper installation, always pair this washer with a new 0750111371: SHAFT SEAL and 0634303085: O-RING to prevent contamination ingress. The washer fits inside the 0631306670: CYLINDRICAL PIN alignment bore and is secured using 0636011356: HEXAGON SCREW fasteners torqued to 45 Nm.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2094101019 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 0899325353 | HOUSING | Intermediate housing for clutch pack support |
| 2094298058 | HOUSING | Rear housing for output shaft bearing |
| 2094301071 | COVER | Sealing cover for access port |
| 0750111371 | SHAFT SEAL | Prevents oil leakage along rotating shaft |
| 0634303085 | O-RING | Static seal between housing halves |
| 0631306670 | CYLINDRICAL PIN | Alignment dowel for housing positioning |
| 0636011356 | HEXAGON SCREW | Fastener for housing assembly |
| 4475280066 | SCREW PLUG | Seals hydraulic test port |
| 0634303312 | O-RING | Seal for screw plug |
