Overview
This genuine OEM ZF 0730.108.598 WASHER is a precision-engineered shim component designed to maintain critical axial clearances within the differential and final drive assemblies of heavy-duty construction machinery transmissions. Positioned between rotating gear sets and bearing races, this washer prevents metal-to-metal contact and ensures proper load distribution under extreme torque conditions. The SKU 0730.108.598 is manufactured to exact ZF tolerances, making it an essential element for transmission longevity. When installed alongside the 5838109012: DIFFERENTIAL, it provides the necessary preload to eliminate gear lash and vibration.
Symptoms of Failure
- Progressive oil seepage from axle housing seals: A worn 0730.108.598 washer allows excessive end-play, which distorts seal alignment and causes gradual lubricant loss.
- Low-speed gear chatter under load: When the washer thickness degrades, the 0750117075: TAPER ROLLER BEARING loses its preload, resulting in audible rumbling during excavation or grading operations.
- Intermittent drive wheel slippage: Insufficient washer height reduces clamping force on the 2093209023: DIFFERENTIAL assembly, causing momentary loss of traction on uneven terrain.
- Metallic debris in transmission fluid: Accelerated wear between the washer and the 5838300626: DIFFERENTIAL HOUSING generates fine steel particles that contaminate the hydraulic system.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0730.108.598 |
| Material | Case-hardened alloy steel (DIN 1.7131) |
| Outer Diameter | 68.0 mm |
| Inner Diameter | 42.5 mm |
| Thickness | 2.50 mm ±0.05 mm |
| Weight | 0.045 kg |
| Surface Hardness | 58-62 HRC |
| OEM Reference | ZF 0730.108.598 |
Compatibility
This washer is specifically engineered for ZF WG180, WG200, and WG310 series power-shift transmissions commonly found in wheel loaders, graders, and telescopic handlers. It also fits select ZF Ecolife and AS-Tronic drivelines used in construction equipment from Volvo, Liebherr, and Caterpillar. Always verify fitment by cross-referencing the 0730.108.598 part number against your transmission’s parts manual.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109012 | DIFFERENTIAL | Distributes torque between drive wheels |
| 0750117075 | TAPER ROLLER BEARING | Supports axial and radial loads on output shaft |
| 2093209023 | DIFFERENTIAL | Rear differential assembly for WG200 series |
| 5838300626 | DIFFERENTIAL HOUSING | Encloses differential gears and bearings |
| 0631329088 | SPRING PIN | Secures shift fork to actuation rod |
| 5838300811 | THRUST WASHER | Controls axial play in planetary gear set |
| 5838300721 | AXLE BEVEL GEAR | Transfers power from differential to axle shaft |
| 5838300633 | AXLE | Drives wheel hub assembly |
| 5838300753 | THRUST WASHER | Reduces friction between sun gear and carrier |
| 5838300818 | THRUST WASHER | Maintains clearance in differential side gears |
Frequently Asked Questions
Q: Can I reuse the 0730.108.598 washer during a transmission rebuild?
A: No. This washer is a single-use component because its thickness is calibrated to compensate for bearing wear. Reusing it will result in incorrect preload and premature failure of the differential assembly.
Q: How do I measure if my current washer has worn beyond tolerance?
A: Use a micrometer to measure thickness at three points around the circumference. If any reading is below 2.40 mm, the washer must be replaced immediately to prevent damage to the taper roller bearing and housing.
Q: Does this part fit ZF 6WG310 transmissions?
A: Yes. The 0730.108.598 is used in the output differential section of 6WG310, WG180, and WG200 series. Always confirm by checking the parts manual for your specific transmission serial number.
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