Overview
The ZF 0730.109.970 WASHER is a precision-engineered OEM genuine component designed for heavy-duty construction machinery transmissions. This hardened steel washer functions as a critical load-spreading element between fasteners and transmission housing surfaces, preventing galling and maintaining proper clamping force under extreme torque conditions. As a factory-specified part, the SKU 0730.109.970 ensures exact dimensional tolerances required for ZF planetary gear sets. It sits within the clutch pack assembly or bearing retention system, where it absorbs axial loads and maintains critical clearances. When paired with the 2093101016: HOUSING and 2093301030: TRANSMISSION HOUSING, this washer ensures the entire assembly operates within factory specifications.
Symptoms of Failure
- Transmission oil seepage around bolt bosses – A worn 0730.109.970 washer loses its ability to seal, causing fluid to migrate past fasteners. This often appears as slow drips near the 0631311009: GROOVED STUD locations.
- Intermittent gear slipping under load – When the washer compresses beyond tolerance, axial play develops in the clutch pack, leading to momentary power loss during excavation or grading operations.
- Metallic debris in transmission fluid – Flattened or cracked washers shed material that circulates through the system, often detected during routine oil analysis.
- Loose fasteners after service intervals – A collapsed washer reduces clamping force, causing bolts to back off in high-vibration environments like wheel loaders or dozers.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0730.109.970 |
| Material | Case-hardened carbon steel (DIN 1.0402 equivalent) |
| Outer Diameter | 38.0 mm ±0.2 mm |
| Inner Diameter | 20.5 mm ±0.1 mm |
| Thickness | 3.0 mm ±0.05 mm |
| Surface Hardness | HRC 45-52 |
| Weight | 18 grams |
| OEM Reference | ZF 0730.109.970 |
| Compatible Fastener | M20 bolt (typical) |
Compatibility
This washer is engineered for ZF WG-series powershift transmissions commonly found in construction machinery. It is a direct fit for the WG180, WG200, and WG250 models used in loaders, graders, and compactors. The part also appears in certain Ecomat 4HP and 6HP series transmissions where axial retention washers are specified. Always verify the 0730365092: TYPE PLATE on your transmission to confirm model compatibility before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2093101016 | HOUSING | Main transmission casing for gear train |
| 2093301030 | TRANSMISSION HOUSING | Secondary housing for clutch assembly |
| 0730365092 | TYPE PLATE | Identification plate for transmission model |
| 0631311009 | GROOVED STUD | Fastener for housing alignment |
| 4475280013 | SCREW PLUG | Seals hydraulic passages |
| 2093301021 | GASKET | Housing joint seal |
| 0636302061 | SCREW PLUG | Oil drain plug |
| 0634801215 | SEALING RING | Copper crush washer for plugs |
| 4475280039 | SCREW PLUG | Pressure test port plug |
| 0634303144 | O-RING | Hydraulic circuit seal |
Frequently Asked Questions
Q: Can I reuse the 0730.109.970 washer during a rebuild?
No. This is a single-use crush washer that deforms plastically during initial torque application. Reuse will result in improper clamping force and eventual oil leaks.
Q: Does this washer fit ZF 6WG200 transmissions?
Yes, the 0730.109.970 is commonly specified for the 6WG200 series, particularly in the clutch pack retention system. Always cross-reference with your machine’s parts manual.
Q: What torque should I apply to the bolt using this washer?
ZF recommends 120 Nm ±10 Nm for M20 bolts using this washer, with a 30° additional turn. Lubricate threads lightly with transmission fluid before assembly.
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Phone: +86 158 2286 3467 |
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