Overview
The ZF 0730.301.871 SNAP RING is a precision-engineered retaining component designed for the WG200, WG92, and related heavy-duty transmission series. This OEM genuine part secures internal assemblies—such as gear clusters and bearing packs—within the transmission housing, preventing axial displacement under high torque loads. As a critical locking element, the snap ring fits into a machined groove on shafts or housings, ensuring that adjacent components like the 4660101011: TRANSMISSION HOUSING maintain correct alignment. The SKU 0730.301.871 is manufactured to ZF’s exacting tolerances, guaranteeing a secure interference fit that withstands vibration and thermal expansion in commercial vehicle drivetrains.
Symptoms of Failure
- Transmission oil leaks at shaft seals: A worn or broken snap ring allows axial movement, which distorts seal surfaces and causes fluid seepage around the output shaft.
- Gear slipping under load: When the snap ring fails to retain a gear cluster, the assembly shifts, leading to intermittent power loss and harsh engagement during acceleration.
- Unusual metallic rattling from the bell housing: A loose snap ring permits components to vibrate against the 4660301018: HOUSING, producing a distinct rattle at idle or low RPM.
- Difficult range shifting: Misalignment caused by a degraded snap ring can interfere with the 0501209818: RANGE SELECTOR mechanism, resulting in delayed or incomplete gear changes.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0730.301.871 |
| Type | Internal Snap Ring (Retaining Ring) |
| Material | Spring Steel (DIN 17222, hardened & tempered) |
| Nominal Diameter (Inner) | ~85 mm (estimated) |
| Thickness | ~3.5 mm (estimated) |
| Weight | ~0.02 kg |
| OEM Reference | ZF 0730.301.871 |
| Surface Finish | Phosphate coated for corrosion resistance |
Compatibility
This snap ring is engineered for ZF’s WG-series transmissions, specifically the WG 200 Series, WG 90 Series, WG 92 Series, WG 94 Series, and WG 98 Series. It is commonly used in conjunction with the 4660198001: PERIPHERALS kit, which includes seals and gaskets for a complete overhaul. While primarily designed for WG200 and WG92 models, the 0730.301.871 also fits select WG180 variants where shaft groove dimensions match. Always verify groove width and diameter against your transmission’s service manual before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4660198001 | PERIPHERALS | Seal and gasket kit for transmission rebuild |
| 0501209818 | RANGE SELECTOR | Controls splitter and range shift engagement |
| 4660101011 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4660301018 | HOUSING | Rear or auxiliary housing section |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel for housing assembly |
| 0769123894 | TYPE PLATE | Identification plate with transmission specs |
| 4660221012 | SUCTION TUBE | Oil pickup tube for lubrication system |
| 0634100317 | O-RING | Static seal for fluid ports |
| 0636103273 | CAP SCREW | Fastener for housing flanges |
| 0750100022 | SCREW PLUG | Sealing plug for inspection ports |
