Overview
The ZF 0730.308.115 SNAP RING is a critical retention component engineered for the WG190 and WG210 series transmissions. This OEM genuine snap ring secures internal gear assemblies and bearing packs within the planetary gearset, preventing axial movement under high-torque loads. Positioned directly inside the main drum or clutch housing, the SKU 0730.308.115 ensures precise clamping force is maintained throughout the transmission’s service life. When installed alongside the 4657101088: TRANSMISSION HOUSING, this snap ring locks the entire rotating assembly into its correct axial position, directly influencing shift quality and drivetrain durability.
Symptoms of Failure
- Intermittent gear slipping under load – A worn or fatigued snap ring allows the clutch pack to shift out of alignment, causing momentary power loss during acceleration.
- Low-pressure oil leaks from the bell housing – When the snap ring loses its tension, the 4657201183: HOUS.FRONT SECT seal interface can be compromised, leading to visible fluid seepage.
- Metallic rattling noise in neutral or park – A broken snap ring permits free play between the sun gear and the 4657201184: HOUSING REAR PART, creating a distinct rattle that worsens with engine RPM.
- Hard shifting between forward gears – Loss of snap ring preload alters the clearance in the 4657298111: HOUSING REAR SECTION, resulting in delayed or harsh engagement.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0730.308.115 |
| Material | Spring steel (C67S / 51CrV4 equivalent) |
| Inner Diameter | 115.0 mm |
| Outer Diameter | 130.5 mm |
| Thickness | 2.5 mm |
| Weight | 0.028 kg |
| OEM Reference | ZF 0730.308.115 |
| Surface Treatment | Phosphate coated / oiled |
Compatibility
This snap ring is a direct replacement for ZF WG180, WG190, WG200, WG210, BP 210, and BP 230 series transmissions. It fits both the main planetary carrier and the output shaft retention grooves. For heavy-duty applications, always verify the groove width in your 4657101088: TRANSMISSION HOUSING before installation. The 0730.308.115 is also compatible with earlier WG150 variants when used with the corresponding 4657201183: HOUS.FRONT SECT adapter ring.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101088 | TRANSMISSION HOUSING | Main structural casing that encloses the gearset and snap ring |
| 4657201183 | HOUS.FRONT SECT | Forward section housing the input shaft and snap ring groove |
| 4657201184 | HOUSING REAR PART | Rear casing that supports the output bearing and snap ring seat |
| 4657298111 | HOUSING REAR SECTION | Intermediate housing section for planetary gear retention |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing dowel positioning |
| 0636100801 | CAP SCREW | M10 fastener for housing-to-bell housing joint |
| 4681301015 | FIXING PLATE | Locking plate for snap ring anti-rotation tab |
| 4681301016 | SCREEN SHEET | Fine mesh filter for oil pump intake |
| 4681301017 | SCREEN SHEET | Coarse mesh filter for valve body return |
| 0636100803 | CAP SCREW | M12 fastener for rear housing cover |
Frequently Asked Questions
Q: Can I reuse the 0730.308.115 snap ring after disassembly?
A: No. ZF recommends replacing this snap ring every time the transmission is opened. The spring steel loses its clamping force after one removal cycle, which can lead to gear walk and premature failure of the TRANSMISSION HOUSING groove.
Q: Does this snap ring fit the WG180 transmission?
A: Yes. The 0730.308.115 is dimensionally identical to the OEM snap ring used in WG180, WG190, and WG210 models. Always cross-check the groove depth in your HOUSING REAR PART before final assembly.
Q: What tools are required for installation?
A: Use a ZF snap ring pliers (internal type) with 1.5 mm tips. Never use screwdrivers or pry bars, as they can distort the ring and damage the HOUSING REAR SECTION groove surface.
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Phone: +86 158 2286 3467 |
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