Overview
The ZF 0730.308.119 SNAP RING is a critical retaining component engineered for the WG190 and WG210 series transmissions. This OEM genuine part secures internal assemblies—such as bearing packs and gear clusters—within the main transmission housing, preventing axial movement under high torque loads. The SKU 0730.308.119 is precision-machined to maintain exacting tolerances, ensuring that the snap ring seats firmly into its groove without deformation. It works in concert with the TRANSMISSION HOUSING to lock components in place, and interfaces directly with the HOUS.FRONT SECT and HOUSING REAR PART to create a unified structural assembly. Without this snap ring, internal clearances can shift, leading to premature wear on planetary gears and clutches.
Symptoms of Failure
- Oil leaks near the housing seam: When the snap ring loses its tension, the HOUSING REAR SECTION may separate slightly, allowing transmission fluid to weep past the gasket.
- Gear slipping under load: A fatigued snap ring permits axial play in the output shaft, causing intermittent engagement loss in higher gears.
- Metallic rattling from the bell housing: Loose internal components vibrate against the housing walls, producing a distinct rattle during acceleration.
- Hard shifting between forward and reverse: Misalignment of the snap ring groove forces the valve body to compensate, resulting in delayed or harsh shifts.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0730.308.119 |
| Material | Spring steel (SAE 1070-1090) |
| Inner Diameter | 119.0 mm |
| Outer Diameter | 130.5 mm |
| Thickness | 3.2 mm |
| Weight | 0.045 kg |
| OEM Reference | ZF 0730.308.119 |
| Heat Treatment | Oil quenched and tempered |
Compatibility
This snap ring is designed for ZF’s WG and BP series heavy-duty transmissions. It is a direct fit for the WG180, WG190, WG200, WG210, BP 210, and BP 230 series. It also applies to the WG250 and WG300 variants when used in conjunction with the correct TRANSMISSION HOUSING. Always verify the groove width in your specific model; the 0730.308.119 snap ring requires a 3.3 mm minimum groove depth for secure retention.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101088 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 4657201183 | HOUS.FRONT SECT | Front section of the transmission housing |
| 4657201184 | HOUSING REAR PART | Rear housing segment for output shaft support |
| 4657298111 | HOUSING REAR SECTION | Complete rear housing assembly |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing mating surfaces |
| 0636100801 | CAP SCREW | Fastener for housing-to-bell housing joint |
| 4681301015 | FIXING PLATE | Retains oil pump and valve body |
| 4681301016 | SCREEN SHEET | Fine mesh filter for hydraulic circuit |
| 4681301017 | SCREEN SHEET | Coarse mesh pre-filter for sump pickup |
| 0636100803 | CAP SCREW | Bolt for securing the rear housing cover |
Frequently Asked Questions
Q: Can the 0730.308.119 snap ring be reused after disassembly?
A: ZF recommends replacing this snap ring whenever the transmission is opened. The spring steel loses residual tension after the first installation, and reusing it may lead to groove wear or component loosening.
Q: Does this snap ring fit the ZF WG180 transmission?
A: Yes, the 0730.308.119 is compatible with the WG180, provided the housing groove is not damaged. It is also a direct fit for the WG190, WG200, and WG210 models.
Q: What tools are needed to install this snap ring?
A: Use a standard external snap ring pliers with 1.5 mm tips. Avoid prying with screwdrivers, as this can distort the ring and compromise its grip on the housing groove.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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