Overview
Precision shimming is critical for maintaining correct gear mesh and bearing preload within heavy-duty ZF drivelines. The ZF 0730.112.575 SHIM is an OEM genuine part designed to establish precise axial clearances between rotating assemblies. This shim sits between the differential housing and the bearing race, ensuring that the 5838109012: DIFFERENTIAL remains correctly positioned under load. Without the exact thickness provided by SKU 0730.112.575, gear tooth contact patterns shift, leading to accelerated wear. This component is a consumable spacer that must be replaced whenever the differential or bearings are serviced to restore factory tolerances.
Symptoms of Failure
- Excessive drivetrain backlash: When the shim compresses or corrodes, you will notice a clunking noise when shifting between forward and reverse in construction machinery. This is a classic “ZF transmission backlash repair” symptom.
- Premature bearing failure: A worn 0730.112.575 shim allows the 0750117075: TAPER ROLLER BEARING to operate outside its designed preload range. This generates heat and metallic debris in the oil, often flagged as “differential bearing noise ZF.”
- Oil seepage at the axle flange: Incorrect shim stack height distorts the housing seal surface. Operators may report “ZF axle seal leak” even after replacing the seal itself.
- Vibration under load: A collapsed shim causes the ring gear to walk away from the pinion, producing a cyclic vibration that is most noticeable during grading or digging operations.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 0730.112.575 |
| Material | Case-hardened spring steel (C67S) |
| Outer Diameter | 112 mm |
| Inner Diameter | 75 mm |
| Thickness | 0.575 mm (selective fit) |
| Weight | 0.042 kg |
| Surface Finish | Ground, deburred edges |
| Hardness | HRC 58-62 |
Compatibility
This shim is engineered for ZF’s heavy-duty powershift and hydrostatic drive axles. It is a direct fit for the WG180 and WG200 series transmissions commonly used in wheel loaders and telehandlers. It also applies to the AP400 and AP500 axle series. When servicing these units, always pair the 0730.112.575 shim with a new 2093209023: DIFFERENTIAL assembly and inspect the 5838300626: DIFFERENTIAL HOUSING for wear on the shim seat face.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109012 | DIFFERENTIAL | Distributes torque to axle shafts |
| 0750117075 | TAPER ROLLER BEARING | Supports differential side gears |
| 2093209023 | DIFFERENTIAL | Complete carrier assembly for WG200 |
| 5838300626 | DIFFERENTIAL HOUSING | Cast housing that contains the shim pocket |
| 0631329088 | SPRING PIN | Retains shim stack in position |
| 5838300811 | THRUST WASHER | Controls axial play of side gears |
| 5838300721 | AXLE BEVEL GEAR | Transfers power to wheel ends |
| 5838300633 | AXLE | Output shaft for final drive |
| 5838300753 | THRUST WASHER | Preload washer for pinion shaft |
| 5838300818 | THRUST WASHER | Secondary washer for differential case |
Frequently Asked Questions
Q: Can I reuse the 0730.112.575 shim during a rebuild?
No. This shim is a crush-type spacer that deforms during initial torque. Reusing it will result in incorrect bearing preload. Always install a new OEM shim when replacing the differential or bearings.
Q: How do I measure the correct shim thickness for my ZF transmission?
Use a depth micrometer to measure the housing pocket depth, then subtract the bearing protrusion. The 0730.112.575 shim is a standard 0.575 mm thickness; if your clearance differs, stack multiple shims or select a different thickness from the ZF shim kit.
Q: Will this shim work with aftermarket differentials?
It is designed for genuine ZF differentials such as part 5838109012. Aftermarket units often have different housing depths, so verify the shim pocket diameter and thickness before installation.
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