Overview
The ZF 0730.308.095 SNAP RING is a critical retention component engineered for the WG190 and WG210 series transmissions. This OEM genuine part, identified by SKU 0730.308.095, functions as a precision axial locking element, securing internal assemblies such as planetary gear sets and bearing packs against the transmission housing. Positioned within the main gear train, this snap ring prevents lateral movement of shafts and gears, ensuring correct gear mesh and load distribution. Without this ring, the entire rotating assembly can shift under torque, leading to catastrophic internal contact. It is a low-cost, high-stakes component that must be replaced during any major overhaul of the TRANSMISSION HOUSING.
Symptoms of Failure
- Intermittent gear slipping under load: When the snap ring fatigues or breaks, the planetary carrier can shift axially, causing partial disengagement of clutch packs. This manifests as a sudden loss of drive power during acceleration.
- Metallic grinding noise from the bell housing: A broken 0730.308.095 ring allows hardened steel components to contact the HOUS.FRONT SECT, producing a distinct grinding sound that worsens with RPM.
- Low hydraulic pressure codes (P0740-P0750): Axial movement of the valve body or pump drive gear due to a missing snap ring can cause pressure drops, triggering transmission fault codes.
- Oil leaks at the rear seal: Excessive end-play from a failed snap ring can distort the HOUSING REAR PART, compromising the rear main seal and causing fluid seepage.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0730.308.095 |
| Material | Spring Steel (SAE 1070-1090) |
| Surface Finish | Phosphate Coated / Black Oxide |
| Inner Diameter (Nominal) | 95.0 mm |
| Cross-Section Thickness | 3.5 mm |
| Weight | 0.018 kg |
| OEM Reference | ZF 0730.308.095 |
| Operating Temperature Range | -40°C to +150°C |
Compatibility
This snap ring is specifically dimensioned for ZF’s heavy-duty off-highway transmissions. It is a direct fit for the WG190 and WG210 series, and is also compatible with the BP 210 and BP 230 series. Technicians have successfully used it in the WG180 and WG200 models when paired with the correct HOUSING REAR SECTION. Always verify the groove width in your specific housing before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101088 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657201183 | HOUS.FRONT SECT | Front section of the transmission housing |
| 4657201184 | HOUSING REAR PART | Rear housing section for output shaft support |
| 4657298111 | HOUSING REAR SECTION | Alternate rear housing casting variant |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing mating surfaces |
| 0636100801 | CAP SCREW | M10 fastener for housing bolt-up |
| 4681301015 | FIXING PLATE | Retains oil pump or valve body assembly |
| 4681301016 | SCREEN SHEET | Fine mesh filter for hydraulic circuit |
| 4681301017 | SCREEN SHEET | Coarse mesh pre-filter for sump |
| 0636100803 | CAP SCREW | M12 fastener for heavy-duty housing joints |
Frequently Asked Questions
Q: Can I reuse the 0730.308.095 snap ring during a rebuild?
A: No. ZF specifies that this snap ring is a single-use component. Reusing it risks metal fatigue failure, which can lead to internal gear clash and expensive damage to the TRANSMISSION HOUSING.
Q: How do I confirm the correct orientation for installation?
A: The snap ring has a chamfered edge that must face the thrust load. Install it with the sharp edge outward toward the HOUS.FRONT SECT to ensure proper seating in the groove.
Q: Will this part fit a WG180 transmission?
A: Yes, the WG180 uses the same snap ring groove dimensions as the WG190. However, always cross-reference the groove width in your HOUSING REAR SECTION to confirm compatibility.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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