Overview
The ZF 0730.107.518 SHIM is a precision-engineered OEM genuine component designed to establish critical axial clearances within heavy-duty ZF transmissions. This thin, hardened steel shim sits between the differential housing and the bearing seat, ensuring that gear mesh patterns and preload tolerances remain within factory specifications. The SKU 0730.107.518 is specifically used to eliminate excessive end-play in the differential assembly, which directly impacts torque distribution and drivetrain stability. Without this shim, the entire gear train can shift under load, leading to accelerated wear on adjacent components.
Symptoms of Failure
When the ZF 0730.107.518 SHIM wears or becomes compressed beyond its service limit, operators will notice distinct mechanical issues. Excessive differential backlash is the most common symptom, often felt as a clunking noise when shifting between forward and reverse. Premature bearing wear occurs because the 0750117075 TAPER ROLLER BEARING loses its proper preload, causing rough rotation. Another clear indicator is gear tooth pitting or chipping on the 2093109029 DIFFERENTIAL due to misaligned contact patterns. Finally, intermittent oil leaks may develop at the differential housing seal as the shaft wobbles out of true alignment.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 0730.107.518 |
| Material | Hardened Spring Steel (C67S) |
| Thickness | 0.50 mm (0.0197 in) |
| Outer Diameter | 85.0 mm (3.346 in) |
| Inner Diameter | 62.0 mm (2.441 in) |
| Weight | 12 grams (0.42 oz) |
| OEM Reference | ZF 0730.107.518 |
| Hardness | HRC 45-50 |
Compatibility
This shim is a standard adjustment component used across multiple ZF power-shift transmission families. It is commonly found in the WG180, WG200, and WG210 series, as well as the 4WG-200 and 5WG-210 variants. The 0730.107.518 shim is also utilized in certain ERGO and ECOMIX drivelines where the differential assembly requires fine axial tuning. When rebuilding these transmissions, this shim is often paired with the 2093209094 DIFFERENTIAL and the 2093309078 DIFF.HOUSING to restore factory tolerances.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2093109029 | DIFFERENTIAL | Distributes torque to axle shafts |
| 0750117075 | TAPER ROLLER BEARING | Supports differential rotation under load |
| 2093209094 | DIFFERENTIAL | Secondary torque distribution unit |
| 2093309078 | DIFF.HOUSING | Encloses and supports differential gears |
| 0631100223 | SPRING PIN | Locks gear alignment during assembly |
| 0730300820 | THRUST WASHER | Reduces axial friction on gear faces |
| 4482360002 | AXLE BEVEL GEAR | Transfers power to wheel axles |
| 2097309085 | DIFFERENTIAL AXLE | Connects differential to final drive |
| 5838300811 | THRUST WASHER | Controls side gear end-play |
| 4482360001 | DIFFERENTIAL BEVEL GEAR | Enables speed differentiation between wheels |
Frequently Asked Questions
Q: How do I know if the 0730.107.518 shim needs replacement?
A: Measure the differential end-play with a dial indicator. If clearance exceeds 0.15 mm (0.006 in) after torquing the bearing cap, the shim has compressed beyond its elastic limit and must be replaced.
Q: Can I stack multiple shims to achieve the correct clearance?
A: ZF recommends using a single shim of the correct thickness. Stacking shims can create uneven load distribution and cause the 0750117075 TAPER ROLLER BEARING to fail prematurely. Always select the proper thickness from the available OEM shim range.
Q: Is this shim compatible with the 2093309078 diff housing?
A: Yes, the 0730.107.518 is specifically designed to seat against the 2093309078 DIFF.HOUSING shoulder. It provides the precise axial stop needed for the differential gear set to rotate without binding.
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