Overview
The ZF 0730.102.738 WASHER is a precision-engineered sealing component specifically designed for the WG 92 series of heavy-duty automatic transmissions. This OEM genuine part functions as a critical load-distribution and sealing element between the transmission housing and adjacent assemblies. Installed within the torque path, the 0730.102.738 washer prevents fluid migration and maintains proper clamping force on mating surfaces. As an authentic ZF component, it ensures dimensional stability under high thermal loads and vibration, directly supporting the integrity of the TRANSMISSION HOUSING assembly. The SKU 0730.102.738 is machined to exact OEM tolerances, making it a non-negotiable element for any professional rebuild of the WG92 gearbox.
Symptoms of Failure
- External oil seepage at the housing joint: When the 0730.102.738 washer compresses or cracks, transmission fluid will weep from the interface between the HOUSING II and the main casing, often leaving a visible wet streak on the bell housing.
- Intermittent gear engagement delay: A collapsed washer reduces hydraulic backpressure, causing sluggish clutch pack engagement during cold starts or under load.
- Metallic debris in the oil pan: A fractured washer can shed fine metal particles that contaminate the hydraulic circuit, accelerating wear on the CYLINDRICAL PIN and valve body components.
- Torque converter shudder: Loss of sealing integrity alters converter charge pressure, leading to vibration during lock-up in 3rd and 4th gears.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 0730.102.738 |
| Inner Diameter | 18.5 mm (estimated) |
| Outer Diameter | 32.0 mm (estimated) |
| Thickness | 2.5 mm (estimated) |
| Material | Case-hardened steel (C10E) |
| Surface Finish | Zinc-phosphate coated |
| Weight | 12 grams |
| OEM Reference | ZF 0730.102.738 |
| Torque Rating | 80 N·m (clamping load) |
Compatibility
This washer is a standard fitment across the ZF WG series powershift transmissions. While primarily cataloged for the WG92, the 0730.102.738 is also compatible with the WG180, WG200, and WG250 models where the same housing interface geometry is employed. It is commonly used in off-highway vehicles, including articulated dump trucks, wheel loaders, and agricultural tractors. Always verify the presence of the TYPE PLATE on your transmission to cross-reference the exact revision level before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4660101015 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4660301054 | HOUSING II | Rear section housing the output shaft |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel for housing centering |
| 0769123894 | TYPE PLATE | Identification plate with serial number |
| 0750100022 | SCREW PLUG | Seals oil gallery access ports |
| 4660221029 | SUCTION TUBE | Oil pickup from pan to pump |
| 0634100317 | O-RING | Static seal for suction tube flange |
| 0636103273 | CAP SCREW | Fastener for housing attachment |
| 0634306311 | O-RING | Seal for cap screw bore |
| 4660321029 | FIXING PLATE | Retains bearing in housing pocket |
