Overview
The ZF 0730.010.748 SHIM is a precision-engineered OEM genuine component designed to establish critical axial clearances within heavy-duty ZF transmissions. This thin, hardened steel spacer sits between the differential housing and the bearing race, ensuring that gear mesh patterns remain within factory tolerances under high torque loads. The SKU 0730.010.748 is specifically calibrated to compensate for manufacturing variances, preventing premature wear on adjacent rotating assemblies. When installed alongside a 5838109012: DIFFERENTIAL, this shim maintains the precise preload necessary for smooth power transfer in construction machinery drivelines.
Symptoms of Failure
- Excessive differential backlash — A worn or collapsed shim allows the ring gear to drift away from the pinion, producing a clunking noise during direction changes and load shifts.
- Premature taper roller bearing failure — Incorrect shim thickness alters bearing preload, leading to overheating and spalling on the roller ends. This often requires replacing the 0750117075: TAPER ROLLER BEARING prematurely.
- Oil contamination from metal debris — As the shim degrades, microscopic steel particles enter the transmission fluid, causing accelerated wear on the 2093209023: DIFFERENTIAL gears and bearings.
- Vibration at the axle housing — Loss of shim integrity creates axial play that transmits harmonic vibrations through the 5838300626: DIFFERENTIAL HOUSING, often felt as a low-frequency rumble during operation.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0730.010.748 |
| Material | Case-hardened alloy steel (DIN 1.3505 equivalent) |
| Thickness | 1.48 mm ±0.02 mm |
| Outer Diameter | 72.0 mm |
| Inner Diameter | 58.5 mm |
| Weight | 0.038 kg |
| Surface Hardness | HRC 58-62 |
| OEM Reference | ZF 0730.010.748 |
Compatibility
This shim is engineered for ZF heavy-duty powershift transmissions commonly found in wheel loaders, graders, and excavators. It is a direct fit for the following transmission models: WG180, WG200, WG210, and 4WG200. The 0730.010.748 is also used in certain ZF ERGOPOWER and ECOMIX drivelines where differential preload adjustment is required. Always verify the shim stack height against the service manual when rebuilding the differential carrier assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109012 | DIFFERENTIAL | Distributes torque to axle shafts while allowing speed differentiation |
| 0750117075 | TAPER ROLLER BEARING | Supports radial and axial loads on the differential carrier |
| 2093209023 | DIFFERENTIAL | Secondary differential unit for multi-axle drive configurations |
| 5838300626 | DIFFERENTIAL HOUSING | Encloses and supports the differential gear set |
| 0631329088 | SPRING PIN | Secures shift fork or actuator components in the valve body |
| 5838300811 | THRUST WASHER | Controls axial end-play between differential gears and housing |
| 5838300721 | AXLE BEVEL GEAR | Transfers power from differential to axle shaft at a right angle |
| 5838300633 | AXLE | Driveshaft component connecting differential to wheel hub |
| 5838300753 | THRUST WASHER | Provides wear surface between planetary gear and carrier |
| 5838300818 | THRUST WASHER | Prevents axial movement of the sun gear in the planetary set |
Frequently Asked Questions
Q: Can I reuse the 0730.010.748 shim during a differential rebuild?
A: No. ZF specifies that shims must be replaced whenever the differential carrier is disassembled. The shim compresses slightly during service, and reusing it will result in incorrect bearing preload and accelerated gear wear.
Q: How do I measure the correct shim thickness for my WG200 transmission?
A: Use a depth micrometer to measure the distance from the bearing bore shoulder to the housing face, then subtract the bearing width. The 0730.010.748 is a standard service shim; if the calculated gap differs, you may need to stack multiple shims or select a different thickness from the ZF shim kit.
Q: Will a damaged shim cause the differential housing to crack?
A: Yes. When the shim fails, the 5838300626: DIFFERENTIAL HOUSING experiences cyclic impact loading from gear backlash. Over time, this stress can initiate hairline cracks near the bearing saddle, requiring complete housing replacement.
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