Overview
The ZF 0730.308.101 SNAP RING is a precision-engineered retaining component designed for the WG190 and WG210 series transmissions. This OEM genuine part secures critical internal assemblies within the gear train, preventing axial movement of shafts and gears under high-torque conditions. Positioned within the planetary gear set or clutch pack stack, the snap ring (SKU: 0730.308.101) ensures that load-bearing components remain locked in their correct positions during operation. When installed correctly alongside the TRANSMISSION HOUSING, it maintains the structural integrity of the entire rotating assembly.
Symptoms of Failure
- Intermittent gear slippage under load — A worn or fatigued snap ring can allow clutch packs or planetary gears to shift axially, causing momentary loss of torque transfer during acceleration or hill climbing.
- Metallic rattling from transmission housing — Loose internal components due to a failed snap ring produce a distinct rattling noise, particularly when the vehicle idles or decelerates.
- Oil contamination with metal particles — As the snap ring degrades, it can score adjacent surfaces inside the HOUS.FRONT SECT, generating fine metallic debris that circulates through the hydraulic system.
- Hard shifting or delayed engagement — Axial play from a broken snap ring alters clutch clearance, leading to harsh engagement or delayed gear changes in WG190 and WG210 transmissions.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0730.308.101 |
| Material | Spring steel (C67S or equivalent) |
| Inner Diameter | Approx. 130 mm |
| Outer Diameter | Approx. 145 mm |
| Thickness | 3.5 mm |
| Weight | ~45 grams |
| OEM Reference | ZF 0730.308.101 |
| Surface Treatment | Phosphate coating for corrosion resistance |
Compatibility
This snap ring is specifically engineered for ZF WG190 and WG210 series transmissions, including the WG180, WG190, WG200, and WG210 models. It also fits select BP 210 and BP 230 series units where the planetary carrier or clutch drum design matches the WG architecture. For installations involving the HOUSING REAR PART or the HOUSING REAR SECTION, verify that the snap ring groove dimensions align with your specific transmission variant. Always cross-reference your transmission serial number before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101088 | TRANSMISSION HOUSING | Main structural casing that encloses all rotating assemblies |
| 4657201183 | HOUS.FRONT SECT | Forward section of the transmission housing supporting input shaft bearings |
| 4657201184 | HOUSING REAR PART | Rear housing segment that aligns output shaft and PTO drives |
| 4657298111 | HOUSING REAR SECTION | Alternate rear housing variant for extended gear configurations |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for precise housing mating during assembly |
| 0636100801 | CAP SCREW | Fastener securing housing sections with controlled torque |
| 4681301015 | FIXING PLATE | Locking plate that prevents fastener loosening under vibration |
| 4681301016 | SCREEN SHEET | Fine mesh filter protecting hydraulic circuits from debris |
| 4681301017 | SCREEN SHEET | Secondary filter screen for high-pressure oil galleries |
| 0636100803 | CAP SCREW | Heavy-duty bolt for rear housing attachment points |
Frequently Asked Questions
Q: Can I reuse the 0730.308.101 snap ring after disassembly?
A: ZF recommends replacing this snap ring whenever the transmission is opened for major repairs. The spring steel loses tension over time, and reusing it increases the risk of axial play or failure.
Q: Does this snap ring fit both WG190 and BP210 transmissions?
A: Yes, the 0730.308.101 is shared across WG190, WG210, BP210, and BP230 series where the internal groove diameter matches. Always measure the groove width in your housing before installation.
Q: What tools are needed to install this snap ring?
A: Use internal snap ring pliers with 90-degree tips. Avoid prying with screwdrivers, as this can distort the ring and compromise its retention force inside the housing groove.
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Phone: +86 158 2286 3467 |
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