Overview
The ZF 0730.109.975 WASHER is a precision-engineered OEM genuine component designed to maintain critical axial clearances within heavy-duty ZF construction machinery transmissions. This hardened steel washer sits between the transmission housing and rotating shaft assemblies, preventing metal-on-metal contact and ensuring consistent load distribution during high-torque operations. As an integral part of the lubrication circuit, the SKU 0730.109.975 works in conjunction with the 2093101016: HOUSING and the 2093301030: TRANSMISSION HOUSING to seal internal oil galleries and protect gear train geometry.
Symptoms of Failure
- Transmission oil seepage at housing joints: When the 0730.109.975 washer flattens or cracks, pressurized ATF can escape past the 0631311009: GROOVED STUD interface, leaving visible drips under the bell housing.
- Gear engagement hesitation under load: A worn washer reduces preload on the planetary carrier, causing delayed clutch pack engagement during low-speed maneuvering.
- Metallic debris in transmission fluid: Thinning of the washer material allows shaft end-play, generating fine steel particles that contaminate the hydraulic circuit.
- Audible knocking from the torque converter area: Excessive axial clearance from a collapsed washer creates a rhythmic clatter during idle, worsening as RPM increases.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0730.109.975 |
| Material | Case-hardened carbon steel (DIN 1.0402 equivalent) |
| Outer Diameter | 42.0 mm |
| Inner Diameter | 28.5 mm |
| Thickness | 2.5 mm |
| Weight | 18 g |
| OEM Reference | ZF 0730.109.975 |
| Surface Finish | Phosphate coated (anti-corrosion) |
Compatibility
This washer is engineered for ZF WG-series powershift transmissions commonly found in wheel loaders, dozers, and telehandlers. Verified compatible models include WG180, WG200, WG210, and WG310 series. It also appears in certain ZF 4WG-200 and 6WG-200 variants. For proper identification, always cross-reference the 0730365092: TYPE PLATE on your transmission housing before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2093101016 | HOUSING | Encloses the torque converter and pump assembly |
| 2093301030 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 0730365092 | TYPE PLATE | Identification tag with transmission serial number |
| 0631311009 | GROOVED STUD | Locating pin for housing alignment |
| 4475280013 | SCREW PLUG | Seals oil passage access ports |
| 2093301021 | GASKET | Prevents fluid leaks between housing halves |
| 0636302061 | SCREW PLUG | Drain/fill plug for transmission pan |
| 0634801215 | SEALING RING | Copper crush washer for plug sealing |
| 4475280039 | SCREW PLUG | High-pressure port plug |
| 0634303144 | O-RING | Hydraulic seal for valve body connections |
Frequently Asked Questions
Q: Can I reuse the 0730.109.975 washer during a rebuild?
A: No. This is a single-use crush washer. Reusing it risks improper clamping force and subsequent oil leaks around the 0634801215: SEALING RING interface.
Q: Does this washer fit ZF 6WG-310 transmissions?
A: Yes. The 0730.109.975 is used in both 4WG and 6WG variants of the WG200/310 family. Always verify against your 0730365092: TYPE PLATE for absolute confirmation.
Q: What torque should I apply to the grooved stud when installing this washer?
A: Tighten the 0631311009: GROOVED STUD to 45 Nm (33 ft-lb) using a calibrated torque wrench. Over-torquing can distort the washer and cause premature failure.
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