Overview
The ZF 0730.301.110 WASHER is an OEM genuine shim component engineered for precise axial clearance control within heavy-duty construction machinery transmissions. This hardened steel washer sits between planetary gear sets and the differential housing, maintaining critical end-play tolerances that prevent gear clash and bearing preload loss. As part number 0730.301.110, it directly interfaces with the 5838300626 DIFFERENTIAL HOUSING to ensure the 5838109009 DIFFERENTIAL assembly operates without excessive axial movement. Without this washer, the entire load path from the 0750117075 TAPER ROLLER BEARING to the 2093209023 DIFFERENTIAL becomes unstable, leading to premature component fatigue.
Symptoms of Failure
- Transmission oil seepage at differential housing seam: When the 0730.301.110 washer wears beyond tolerance, the differential housing shifts, breaking the seal and causing slow oil leaks around the housing gasket.
- Intermittent gear slipping under heavy load: A worn washer allows the differential to walk axially, momentarily disengaging gear teeth during excavation or lifting cycles.
- Metallic grinding noise during turns: Loss of washer thickness creates metal-on-metal contact between the taper roller bearing and the housing, producing a distinct grinding sound when the machine articulates.
- Increased backlash in final drive: Operators may notice a clunk when shifting between forward and reverse, indicating excessive play that originates from a collapsed thrust washer.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0730.301.110 |
| Material | Case-hardened alloy steel (DIN 1.7131) |
| Outer Diameter | 110 mm |
| Inner Diameter | 90 mm |
| Thickness | 2.5 mm |
| Weight | 0.085 kg |
| OEM Reference | ZF 0730.301.110 |
| Hardness | HRC 58-62 |
Compatibility
This washer is designed for ZF heavy-duty powershift transmissions commonly used in construction machinery. It is a direct fit for the WG180, WG200, and WG210 series. It also appears in the 4WG-200 and 5WG-180 variants where the differential housing uses a shimmed bearing preload system. Always verify the thickness requirement using the service manual, as selective fit washers (available in 0.1 mm increments) are used during rebuild.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109009 | DIFFERENTIAL | Distributes torque to axle shafts |
| 0750117075 | TAPER ROLLER BEARING | Supports differential rotation under load |
| 2093209023 | DIFFERENTIAL | Secondary differential for planetary drive |
| 5838300626 | DIFFERENTIAL HOUSING | Encloses differential and bearing assembly |
| 0631329088 | SPRING PIN | Secures washer alignment in housing groove |
| 5838300811 | THRUST WASHER | Axial load distribution for bevel gear |
| 5838300721 | AXLE BEVEL GEAR | Transfers power to wheel hubs |
| 5838300633 | AXLE | Rotates with differential side gears |
| 5838300753 | THRUST WASHER | Controls axial play in planetary set |
| 5838300818 | THRUST WASHER | Spacer between differential and housing |
Frequently Asked Questions
Q: Can I reuse the 0730.301.110 washer during a transmission rebuild?
A: No. This is a selective-fit shim that work-hardens during service. Always replace it with a new OEM washer and measure the new clearance to select the correct thickness.
Q: Will a worn washer cause damage to the taper roller bearing?
A: Yes. A collapsed washer allows the bearing cone to slide off its race, leading to brinelling and eventual cage fracture. Always inspect the 0750117075 TAPER ROLLER BEARING when replacing this washer.
Q: How do I verify the correct washer thickness for my WG200 transmission?
A: Install the differential housing without the washer, measure the gap with a depth micrometer, then subtract the desired preload (typically 0.05-0.15 mm) to determine the required shim thickness.
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