Overview
This ZF 0730.109.556 WASHER is an OEM genuine shim component engineered for precision load distribution within heavy-duty construction machinery transmissions. Positioned between planetary gear sets and bearing assemblies, this hardened steel washer maintains critical axial clearances in the differential housing. The SKU 0730.109.556 is specifically designed to prevent metal-to-metal contact under extreme torque loads, ensuring smooth power transfer from the transmission to the final drive. When installed alongside the 5838109012: DIFFERENTIAL, this washer forms a sealed interface that protects internal gear teeth from premature wear.
Symptoms of Failure
- Transmission oil seepage at axle seals – A worn 0730.109.556 washer allows lateral movement, breaking the seal between the 5838300626: DIFFERENTIAL HOUSING and output shaft, causing visible drips under parked equipment.
- Intermittent gear slipping under load – Thickness reduction from fatigue creates excessive end-play, leading to momentary loss of drive engagement when excavators or loaders encounter resistance.
- Metallic grinding during turns – A collapsed washer permits the 2093209023: DIFFERENTIAL side gears to contact the housing, producing a distinct chatter in tight-radius maneuvers.
- Elevated operating temperatures – Friction from insufficient clearance generates heat that degrades transmission fluid viscosity, often flagged by dashboard warning lights on wheel loaders.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0730.109.556 |
| Material | Case-hardened alloy steel (SAE 8620) |
| Outer Diameter | 68.5 mm |
| Inner Diameter | 42.0 mm |
| Thickness | 2.5 mm (selective fit tolerance ±0.05 mm) |
| Weight | 0.042 kg |
| Surface Hardness | 58-62 HRC |
| OEM Reference | ZF 0730.109.556 |
Compatibility
This washer is a factory-fit component for ZF WG180, WG200, and WG250 series powershift transmissions commonly used in Caterpillar, Volvo, and Komatsu construction equipment. It directly interfaces with the 0750117075: TAPER ROLLER BEARING to maintain preload on the differential carrier. The 0730.109.556 also appears in ZF 4WG-200 and 5WG-300 torque converter transmissions for wheel loaders and graders. Always verify thickness requirements against service manual specifications before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109012 | DIFFERENTIAL | Distributes torque to axle shafts |
| 0750117075 | TAPER ROLLER BEARING | Supports differential carrier rotation |
| 2093209023 | DIFFERENTIAL | Rear axle torque distribution |
| 5838300626 | DIFFERENTIAL HOUSING | Encloses gear set and bearings |
| 0631329088 | SPRING PIN | Secures shift fork to rail |
| 5838300811 | THRUST WASHER | Absorbs axial loads on planetary gears |
| 5838300721 | AXLE BEVEL GEAR | Transfers power to wheel hubs |
| 5838300633 | AXLE | Drives final reduction gears |
| 5838300753 | THRUST WASHER | Controls side gear clearance |
| 5838300818 | THRUST WASHER | Adjusts differential pinion spacing |
Frequently Asked Questions
Q: Can I reuse the 0730.109.556 washer during a rebuild?
A: No. This is a single-use crush washer that deforms during initial torque application. Always replace it with a new OEM part to maintain proper bearing preload.
Q: How do I verify the correct thickness of this washer?
A: Measure the existing stack height with a depth micrometer. The 0730.109.556 is available in 0.1 mm increments; select the thickness that achieves 0.05-0.15 mm end-play on the differential assembly.
Q: Will this washer fit ZF 4WG-310 transmissions?
A: No. The 0730.109.556 is specific to WG180-WG250 series. For 4WG-310 models, use ZF part 5838300818 instead.
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Phone: +86 158 2286 3467 |
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