Overview
The ZF 0730.009.684 SHIM is a precision-engineered OEM genuine part designed to establish critical axial clearances within the differential assembly of heavy-duty construction machinery transmissions. This shim sits between the differential housing and the bearing seat, ensuring that gear mesh patterns remain within factory tolerances under extreme load conditions. The SKU 0730.009.684 is manufactured from high-strength steel to resist deformation during repeated thermal cycling. By maintaining exact spacing, this shim prevents premature wear on adjacent components such as the 2093109029: DIFFERENTIAL and the 0750117075: TAPER ROLLER BEARING, both of which rely on precise shim thickness for proper preload.
Symptoms of Failure
- Differential whine under load: A worn shim allows the 2093209094: DIFFERENTIAL gear set to shift out of alignment, producing a high-pitched noise during acceleration or turning.
- Oil seepage at axle housing: When the shim compresses unevenly, the 2093309078: DIFF.HOUSING seal loses its contact surface, leading to gradual lubricant loss.
- Intermittent gear slipping: Excessive axial play from a collapsed shim causes the ring gear to momentarily disengage from the pinion, resulting in power loss during heavy digging or grading operations.
- Vibration in the driveline: Backlash that exceeds 0.5 mm due to shim wear creates a rhythmic shudder felt through the chassis at specific RPM ranges.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0730.009.684 |
| Material | Carbon steel (C45E), case-hardened |
| Outer Diameter | 68.0 mm |
| Inner Diameter | 42.5 mm |
| Thickness | 1.25 mm (selective fit) |
| Weight | 18 g |
| OEM Reference | ZF 0730.009.684 |
| Hardness | HRC 58-62 |
Compatibility
This shim is primarily used in ZF WG180, WG200, and WG310 series powershift transmissions found in wheel loaders, graders, and heavy forklifts. It also fits select ZF 4WG-200 and 6WG-200 variants where the differential assembly uses a 68 mm outer diameter bearing seat. Always verify the existing shim thickness before replacement, as the 0730.009.684 is a service-grade part that compensates for wear in the 2093109029: DIFFERENTIAL and 2093209094: DIFFERENTIAL assemblies.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2093109029 | DIFFERENTIAL | Distributes torque between axle shafts |
| 0750117075 | TAPER ROLLER BEARING | Supports differential carrier rotation |
| 2093209094 | DIFFERENTIAL | Secondary torque split unit |
| 2093309078 | DIFF.HOUSING | Encloses differential gears and bearings |
| 0631100223 | SPRING PIN | Secures shim and gear alignment |
| 0730300820 | THRUST WASHER | Reduces axial friction on side gears |
| 4482360002 | AXLE BEVEL GEAR | Transfers power to wheel hubs |
| 2097309085 | DIFFERENTIAL AXLE | Carries differential side gears |
| 5838300811 | THRUST WASHER | Controls end-play in differential |
| 4482360001 | DIFFERENTIAL BEVEL GEAR | Engages with pinion for speed differentiation |
Frequently Asked Questions
Q: How do I know if the 0730.009.684 shim is the correct thickness for my transmission?
A: Measure the existing shim stack with a micrometer. The 0730.009.684 is 1.25 mm thick; if your assembly requires a different thickness, stack multiple shims or use a single shim from the ZF selective range (1.00–1.50 mm).
Q: Can I reuse this shim after a differential rebuild?
A: No. The shim work-hardens during service and loses its ability to maintain consistent preload. Always install a new OEM 0730.009.684 shim when replacing the 0750117075: TAPER ROLLER BEARING or 2093309078: DIFF.HOUSING.
Q: Does this shim fit ZF 4WG-200 transmissions used in Volvo loaders?
A: Yes, the 0730.009.684 is compatible with 4WG-200 and 6WG-200 series, provided the differential housing uses a 68 mm bearing bore. Verify your housing part number against the 2093309078: DIFF.HOUSING specifications.
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