Overview
The ZF 0730.109.624 WASHER is a precision-engineered OEM genuine shim component designed to maintain critical axial clearances within the planetary gear sets of heavy-duty construction machinery transmissions. This hardened steel washer sits between the sun gear and the planetary carrier, ensuring correct preload on the 0750117075: TAPER ROLLER BEARING assembly. By absorbing thrust loads and preventing metal-to-metal contact, the 0730.109.624 washer directly influences gear mesh accuracy and overall transmission longevity. This SKU is a direct replacement for the original factory-installed part, guaranteeing identical material hardness and dimensional tolerances.
Symptoms of Failure
- Transmission oil leaks at the axle housing interface: A worn 0730.109.624 washer allows excessive axial play, which can distort the 5838300626: DIFFERENTIAL HOUSING seal surface, leading to fluid seepage around the output flange.
- Intermittent gear slipping under load: When the washer thickness degrades, the 5838109012: DIFFERENTIAL assembly loses proper bearing preload, causing momentary torque loss during excavation or grading operations.
- Metallic grinding noise from the transmission sump: A collapsed washer permits the 2093209023: DIFFERENTIAL gears to contact the housing, producing a distinct low-frequency growl that intensifies in reverse gear.
- Increased end-play at the drive axle: Measurable lateral movement of the axle shaft (over 0.5 mm) indicates the thrust washer has worn beyond service limits, risking catastrophic gear tooth fracture.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0730.109.624 |
| Material | Case-hardened alloy steel (DIN 1.7131) |
| Outer Diameter | 62.0 mm |
| Inner Diameter | 38.5 mm |
| Thickness | 2.5 mm (nominal) |
| Hardness | 58-62 HRC |
| Weight | 0.045 kg |
| OEM Reference | ZF 0730.109.624 |
Compatibility
This washer is engineered for ZF’s WG series powershift transmissions commonly used in wheel loaders, graders, and telehandlers. It is a direct fit for the following models: WG180, WG200, WG210, WG310. The 0730.109.624 also appears in certain ZF 4WG-200 and 6WG-310 variants. Always verify the washer thickness against the service manual specification for your specific transmission serial number, as selective shimming may require alternative thicknesses.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109012 | DIFFERENTIAL | Distributes torque to axle shafts |
| 0750117075 | TAPER ROLLER BEARING | Supports differential carrier rotation |
| 2093209023 | DIFFERENTIAL | Rear axle torque distribution |
| 5838300626 | DIFFERENTIAL HOUSING | Encloses differential gear set |
| 0631329088 | SPRING PIN | Retains shift fork position |
| 5838300811 | THRUST WASHER | Axial load bearing for planetary gears |
| 5838300721 | AXLE BEVEL GEAR | Transfers power to wheel hubs |
| 5838300633 | AXLE | Drives final reduction gears |
| 5838300753 | THRUST WASHER | Spacer for differential side gears |
| 5838300818 | THRUST WASHER | Bearing surface for output shaft |
Frequently Asked Questions
Q: Can I reuse the 0730.109.624 washer during a transmission rebuild?
No. This is a one-time-use crush washer that deforms during initial torque application. Reusing it will result in incorrect bearing preload and premature failure of the 0750117075: TAPER ROLLER BEARING.
Q: How do I know if I need the 2.5 mm or a different thickness?
Measure the axial clearance between the differential housing and the 5838300626: DIFFERENTIAL HOUSING using a dial indicator. The service manual specifies a target end-play of 0.05-0.15 mm; select the washer thickness that achieves this range.
Q: Will this washer fit a ZF 4WG-200 transmission from 1998?
Yes, the 0730.109.624 is compatible with all 4WG-200 variants, provided the differential assembly uses the 5838109012: DIFFERENTIAL carrier. Check the parts manual for your specific serial number range.
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