Overview
This ZF 0730.109.559 WASHER is an OEM genuine shim component engineered for precise axial clearance control within heavy-duty construction machinery transmissions. Positioned between planetary gear sets and bearing races, this hardened steel washer absorbs thrust loads and maintains critical gear mesh alignment. The part number 0730.109.559 is specifically designed to prevent metal-to-metal contact in high-torque applications, ensuring the differential assembly operates within factory tolerances. When installed alongside the 5838109012: DIFFERENTIAL, this washer stabilizes the rotating assembly and extends service intervals.
Symptoms of Failure
- Transmission oil leaks from axle housing seals – A worn 0730.109.559 washer allows excessive end-play, distorting the 5838300626: DIFFERENTIAL HOUSING seal surface and causing fluid seepage.
- Gear slipping under load in construction equipment – Reduced washer thickness alters preload on the 0750117075: TAPER ROLLER BEARING, leading to intermittent power loss during excavation or grading.
- Metallic grinding noise during turns – Failed thrust washers permit the 2093209023: DIFFERENTIAL gears to contact housing walls, producing audible wear debris.
- Vibration in the driveline at low RPM – Uneven washer wear creates axial play that resonates through the transmission case during loader or dozer operation.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0730.109.559 |
| Material | Case-hardened alloy steel (DIN 1.7131) |
| Outer Diameter | 89.5 mm |
| Inner Diameter | 72.0 mm |
| Thickness | 2.50 mm (selective fit) |
| Weight | 0.042 kg |
| Surface Hardness | 58-62 HRC |
| OEM Reference | ZF 0730.109.559 |
Compatibility
This washer is a factory-fit component for ZF WG180, WG200, and WG310 series power shift transmissions commonly used in wheel loaders, graders, and excavators. It also appears in ZF TC-Tronic and Ecolife drivelines where axial shimming of the differential carrier is required. Always verify clearance with the 5838300811: THRUST WASHER during rebuild to ensure correct stack height.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109012 | DIFFERENTIAL | Distributes torque between drive wheels |
| 0750117075 | TAPER ROLLER BEARING | Supports radial and axial loads on differential shaft |
| 2093209023 | DIFFERENTIAL | Secondary differential unit for multi-axle machines |
| 5838300626 | DIFFERENTIAL HOUSING | Encloses and aligns differential gear set |
| 0631329088 | SPRING PIN | Secures washer and gear alignment during assembly |
| 5838300811 | THRUST WASHER | Provides axial bearing surface for planetary gears |
| 5838300721 | AXLE BEVEL GEAR | Transfers power from differential to axle shafts |
| 5838300633 | AXLE | Drives final reduction gear set |
| 5838300753 | THRUST WASHER | Controls end-play in differential side gears |
| 5838300818 | THRUST WASHER | Compensates for thermal expansion in housing |
Frequently Asked Questions
Q: Can I reuse the ZF 0730.109.559 washer during a transmission rebuild?
A: No. This is a selective-fit shim that deforms under load. Always replace it with a new OEM washer to maintain proper preload on the taper roller bearing and differential assembly.
Q: How do I know if the 0730.109.559 washer is the correct thickness for my WG200 transmission?
A: Measure the axial clearance between the differential housing and bearing race using a dial indicator. The target end-play is 0.08-0.15 mm. Select the washer thickness that achieves this spec.
Q: Does this washer work with the 5838300811 thrust washer?
A: Yes. The 0730.109.559 is installed on the opposite side of the differential carrier from the 5838300811 thrust washer. Both must be replaced simultaneously to avoid uneven wear.
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