Overview
The ZF 0730.108.556 WASHER is a precision-engineered OEM genuine component designed to maintain critical axial clearance within ZF heavy-duty transmission assemblies. This hardened steel washer sits between the main shaft and gearshift components, preventing metal-on-metal contact and ensuring proper load distribution during high-torque operations. As a factory-spec part, the SKU 0730.108.556 is essential for maintaining the tight tolerances required in construction machinery transmissions. When paired with a 2094104412: MAIN SHAFT or 2094304054: MAIN SHAFT, this washer ensures the entire rotating assembly remains within factory specifications.
Symptoms of Failure
- Transmission oil leaks around the main shaft housing – A worn 0730.108.556 washer allows excessive axial play, breaking the seal between rotating and stationary components. This often manifests as slow drips near the PTO or output flange.
- Gear engagement difficulty or grinding noises – When the washer thickness degrades, the 2094106010: SHIFT SYSTEM cannot align properly, causing harsh shifts or audible grinding during gear changes.
- Vibration at specific RPM ranges – Loss of washer integrity creates imbalance in the 2094206001: GEARSHIFT SHAFT assembly, producing noticeable vibration between 1500-2000 RPM under load.
- Premature bearing wear – A collapsed washer forces adjacent bearings to absorb axial loads they weren’t designed for, leading to metallic debris in the transmission fluid.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0730.108.556 |
| Material | Case-hardened steel (DIN 1.7131) |
| Outer Diameter | 42.0 mm |
| Inner Diameter | 28.5 mm |
| Thickness | 2.5 mm |
| Surface Hardness | 58-62 HRC |
| Weight | 18 grams |
| OEM Reference | ZF 0730.108.556 |
Compatibility
This washer is a standard fitment in ZF WG180, WG200, and WG210 series transmissions commonly found in wheel loaders, graders, and telescopic handlers. It also appears in certain ZF Ecolife and Ecomat variants used in construction machinery. The 0730.108.556 interfaces directly with the 2094304054: MAIN SHAFT and 2094106010: SHIFT SYSTEM in these models. Always verify your transmission serial number before ordering, as later production runs may use alternative shim configurations.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2094104412 | MAIN SHAFT | Transfers torque from engine to gear train |
| 2094304054 | MAIN SHAFT | Alternate spline configuration for WG200 |
| 2094106010 | SHIFT SYSTEM | Controls clutch pack engagement |
| 2094206001 | GEARSHIFT SHAFT | Transmits shift lever motion to forks |
| 2094306053 | GEARSHIFT SHAFT | Longer variant for 6-speed models |
| 0630513070 | SNAP RING | Secures washer in position on shaft |
| 2094306019 | WASHER | Thicker variant for shim adjustment |
| 0732040444 | COMPRESSION SPRING | Provides preload to shift system |
| 0732040728 | COMPRESSION SPRING | Higher tension spring for heavy loads |
| 2093206001 | BUSH | Wear surface for gearshift shaft |
Frequently Asked Questions
Q: Can I reuse the 0730.108.556 washer during a rebuild?
A: ZF recommends always replacing this washer during any transmission overhaul. The case-hardened surface can develop microscopic stress fractures that are invisible to the naked eye but will cause premature failure within 500 operating hours.
Q: What torque should I apply to the retaining nut when installing this washer?
A: The retaining nut for the 2094104412: MAIN SHAFT should be torqued to 180 Nm, then rotated an additional 60 degrees. Always use a new 0630513070: SNAP RING to lock the assembly.
Q: Will this washer fit a ZF 6WG310 transmission?
A: No. The 0730.108.556 is designed for WG180-WG210 series only. The 6WG310 uses a larger 50mm outer diameter washer (part 2094306019).
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Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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