Overview
The ZF 0730.300.820 THRUST WASHER is a precision-engineered OEM genuine component designed to manage axial loads and maintain critical clearances within the differential assembly of heavy-duty construction machinery transmissions. Positioned between rotating gears and stationary housings, this thrust washer prevents metal-on-metal contact, reducing friction and heat buildup. The SKU 0730.300.820 is a direct replacement part that ensures the longevity of your transmission by stabilizing the gear stack. When installed alongside a 2093109002: DIFFERENTIAL, this washer provides the necessary thrust surface to handle high torque loads during excavation and grading operations.
Symptoms of Failure
- Transmission whining noise under load: A worn 0730.300.820 thrust washer allows excessive gear end-play, creating a high-pitched whine during acceleration or heavy lifting.
- Intermittent gear slipping in forward gears: When the washer thickness degrades, axial clearance increases, causing the gear cluster to shift and lose engagement, particularly in WG-series transmissions.
- Metallic debris in transmission fluid: As the hardened steel surface flakes away, fine metallic particles contaminate the oil, often visible during routine drain intervals.
- Overheating differential housing: Increased friction from a collapsed thrust washer generates excess heat, which can warp nearby components like the 2093309071: DIFF.HOUSING.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 0730.300.820 |
| Material | Case-hardened steel (HRC 58-62) |
| Outer Diameter | 82.0 mm |
| Inner Diameter | 60.0 mm |
| Thickness | 3.0 mm |
| Weight | 0.045 kg |
| OEM Reference | ZF 0730.300.820 |
| Surface Finish | Ground, phosphate-coated |
Compatibility
This thrust washer is a standard fitment in ZF WG180, WG200, and WG250 series powershift transmissions commonly used in wheel loaders, dozers, and graders. It also appears in select ZF Ergopower and Ecolife models where differential axial thrust control is required. For complete differential rebuilds, pair this washer with a 0750117075: TAPER ROLLER BEARING to ensure proper preload and rotational stability. Always verify your transmission model number before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2093109002 | DIFFERENTIAL | Distributes torque to axle shafts |
| 0750117075 | TAPER ROLLER BEARING | Supports radial and axial loads |
| 2093209095 | DIFFERENTIAL | Secondary torque distribution unit |
| 2093309071 | DIFF.HOUSING | Encloses differential gears |
| 0631100223 | SPRING PIN | Secures gear alignment |
| 4482360002 | AXLE BEVEL GEAR | Transfers power to wheel hubs |
| 2097309085 | DIFFERENTIAL AXLE | Connects differential to final drive |
| 5838300811 | THRUST WASHER | Alternate axial load bearing |
| 4482360001 | DIFFERENTIAL BEVEL GEAR | Changes torque direction |
| 2093309049 | SLEEVE | Spacer for gear alignment |
Frequently Asked Questions
Q: Can I reuse the old thrust washer if it looks intact?
A: No. The 0730.300.820 is a wear item that compresses over time. Even minimal thickness loss alters gear lash and can damage the 2093209095: DIFFERENTIAL assembly. Always replace with a new OEM part during rebuilds.
Q: Does this washer require lubrication before installation?
A: Yes. Coat the thrust washer with clean transmission fluid or assembly lube to prevent galling during initial startup. This ensures the washer beds into the 2093309071: DIFF.HOUSING correctly.
Q: How do I confirm the correct orientation during installation?
A: The washer is symmetrical, but the oil grooves (if present) must face the rotating gear face. Check the original part orientation or consult the ZF service manual for your specific transmission model.
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Phone: +86 158 2286 3467 |
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