Overview
The ZF 0730.007.800 WASHER is an OEM genuine precision shim engineered for critical load distribution within ZF heavy-duty transmission assemblies. This hardened steel washer sits between planetary gear sets and housing shoulders, maintaining exact axial clearances that prevent gear clash under high torque. As a factory-spec component, the SKU 0730.007.800 ensures that clamping forces from adjacent fasteners are evenly spread, protecting softer aluminum housings from galling. In construction machinery transmissions, this washer directly supports the 5838109012: DIFFERENTIAL assembly by maintaining proper preload on the 0750117075: TAPER ROLLER BEARING, which in turn stabilizes the 2093209023: DIFFERENTIAL unit.
Symptoms of Failure
- Transmission oil weeping from housing joints: A worn 0730.007.800 washer allows the 5838300626: DIFFERENTIAL HOUSING to shift slightly, breaking the seal at gasket interfaces. This creates slow oil drips visible on the bell housing.
- Intermittent gear slipping under load: When the washer thickness degrades, axial play increases in the planetary carrier, causing momentary loss of torque transfer during heavy digging cycles.
- Metallic clicking from the differential area: Insufficient washer height lets the taper roller bearing lose preload, producing a distinct “tick-tick” sound when turning at low RPM.
- Vibration through the driveline at 20-30 mph: Uneven washer compression creates a wobble in the differential carrier, felt as a rhythmic shake in the operator cab.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0730.007.800 |
| Material | Hardened Carbon Steel (HRC 45-50) |
| Outer Diameter | 72.0 mm |
| Inner Diameter | 50.5 mm |
| Thickness | 2.0 mm |
| Weight | 0.035 kg |
| OEM Reference | ZF 0730.007.800 |
Compatibility
This genuine ZF washer is engineered for the WG180, WG200, and WG210 series powershift transmissions commonly found in wheel loaders, graders, and dozers. It also fits select ECCOMAT 2HP and 3HP models used in agricultural tractors. The washer is a direct replacement in the differential carrier assembly where it interfaces with the 5838300811: THRUST WASHER and 5838300721: AXLE BEVEL GEAR.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109012 | DIFFERENTIAL | Distributes torque between drive wheels |
| 0750117075 | TAPER ROLLER BEARING | Supports axial and radial loads on differential shaft |
| 2093209023 | DIFFERENTIAL | Secondary differential unit for multi-axle machines |
| 5838300626 | DIFFERENTIAL HOUSING | Encloses differential gears and bearings |
| 0631329088 | SPRING PIN | Locks differential components in position |
| 5838300811 | THRUST WASHER | Reduces friction between rotating gear faces |
| 5838300721 | AXLE BEVEL GEAR | Transfers power from differential to axle shaft |
| 5838300633 | AXLE | Drives wheel hubs from differential output |
| 5838300753 | THRUST WASHER | Controls end-play in planetary gear sets |
| 5838300818 | THRUST WASHER | Provides wear surface for sun gear thrust |
Frequently Asked Questions
Q: Can I reuse the 0730.007.800 washer during a transmission rebuild?
A: No. This hardened washer is a single-use crush-type shim. Reusing it will not restore proper preload and can lead to differential bearing failure within 50 operating hours.
Q: How do I verify the correct thickness of this washer?
A: Measure the old washer with a micrometer. The OEM spec is 2.0 mm ±0.05 mm. If the thickness is below 1.90 mm, replacement is mandatory to avoid gear clash.
Q: Does this washer fit the ZF WG180 transmission?
A: Yes. The 0730.007.800 is the factory-installed washer in the WG180 differential carrier. It also works in WG200 and WG210 models without modification.
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