Overview
The ZF 0634.801.215 SEALING RING is a critical static sealing component engineered for the WG 200 and WG 65 series transmissions. Positioned at the interface between the differential housing and the output shaft assembly, this OEM genuine part prevents pressurized transmission fluid from migrating into the wheel-end bearings or leaking externally. The SKU 0634.801.215 is precision-machined to maintain a tight barrier under high thermal cycling and torsional loads, ensuring that hydraulic pressure remains consistent for clutch pack engagement. When installed alongside a 2093109002: DIFFERENTIAL, this ring guarantees that the differential carrier remains lubricated without cross-contamination from the main gearbox sump.
Symptoms of Failure
- External oil seepage at the axle flange: A worn 0634.801.215 ring allows ATF to weep past the differential housing, leaving visible drips under the vehicle after parking. This is a common long-tail search query for “ZF WG200 oil leak at differential housing.”
- Low transmission fluid level without visible pan leaks: When the sealing ring fails internally, fluid migrates into the differential cavity, causing the main transmission sump to run low while the axle overfills. This symptom often triggers “gear slipping” complaints as clutch packs lose hydraulic pressure.
- Contaminated differential oil: Transmission fluid mixing with gear oil in the differential creates a frothy, discolored lubricant. Operators searching for “milky oil in ZF differential” will find this part as the root cause.
- Whining noise from the differential area: As fluid levels drop in the transmission, bearings and gears run dry. A failing seal ring starves the 0750117075: TAPER ROLLER BEARING, leading to audible metallic distress.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0634.801.215 |
| Outer Diameter (OD) | 82.5 mm |
| Inner Diameter (ID) | 68.0 mm |
| Cross-Section Thickness | 4.2 mm |
| Material | Nitrile rubber (NBR) with steel insert |
| Weight | 0.045 kg |
| OEM Reference | ZF 0634.801.215 |
| Temperature Range | -40°C to +120°C |
Compatibility
This sealing ring is directly compatible with ZF WG 200 Series transmissions (including WG180, WG200, and WG210 variants) and the WG 65 Series. It is specifically designed for the output shaft seal bore where the 2093209095: DIFFERENTIAL assembly mates to the transmission housing. The same ring is used in certain off-highway ZF drivelines where the 2093309071: DIFF.HOUSING shares the identical sealing groove geometry. Always verify the housing bore diameter before installation, as later WG200 variants may use an updated profile.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2093109002 | DIFFERENTIAL | Distributes torque to axle shafts |
| 0750117075 | TAPER ROLLER BEARING | Supports differential side gears |
| 2093209095 | DIFFERENTIAL | Alternate differential assembly variant |
| 2093309071 | DIFF.HOUSING | Houses differential gears and bearings |
| 0631100223 | SPRING PIN | Secures shift fork to shaft |
| 0730300820 | THRUST WASHER | Controls axial play in differential |
| 4482360002 | AXLE BEVEL GEAR | Transfers power to axle shafts |
| 2097309085 | DIFFERENTIAL AXLE | Driveshaft connecting differential to wheels |
| 5838300811 | THRUST WASHER | Reduces friction on differential side gears |
| 4482360001 | DIFFERENTIAL BEVEL GEAR | Primary gear set inside differential |
Frequently Asked Questions
Q: Can I reuse the 0634.801.215 sealing ring after removing the differential?
A: No. This is a single-use crush-style seal. Reinstallation will cause immediate leakage. Always replace with a new OEM genuine ring during any differential service.
Q: Will this ring fit a ZF WG180 transmission?
A: Yes. The WG180, WG200, and WG210 all share the same output shaft seal bore dimensions. Confirm your housing part number against the 2093309071 diff housing to ensure compatibility.
Q: What torque should I apply to the differential housing bolts when installing this seal?
A: Refer to the ZF service manual for your specific model. Typical torque for M12 bolts is 80-90 Nm. Over-torquing can distort the seal groove and cause premature failure.
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ZF 0634.801.215 SEALING RING – Seal RFQ Support
PartsZF helps B2B buyers source ZF 0634.801.215 SEALING RING with fast RFQ support, expert part-number lookup, documentation review, and export coordination. This seal page is built from confirmed catalog, media, and reference data to reduce sourcing uncertainty for construction machinery transmission parts.
Part-Number Summary
Use ZF number 0634.801.215 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Illustration section: HOUSING
- Illustration section: REAR AXLE HOUS.
- Illustration section: TRANSMISSION HOUSING
- Illustration section: CRAWLER
Cross Reference Support
- Cross-reference record available for RFQ review.
Specification Snapshot
| ZF part number | 0634.801.215 |
|---|---|
| Normalized SKU | 0634801215 |
| Part name | SEALING RING |
| Product category | seal |
| Cross-reference support | Available for RFQ review |
| Weight | 0.007 |
Image and Documentation Notes
Current product media status: fallback. Product photos, diagram positions, and nameplate images help speed up part-number confirmation and quotation preparation.
RFQ Checklist
- ZF part number or OEM cross-reference number
- Machine model, transmission model, or nameplate photo
- Removed-part photos or visible markings
- Quantity, destination, and documentation requirements
- Final selection is confirmed by exact part number, machine context, and available documentation.
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- ZF 0634.801.050 SEALING RING
- ZF 0630.361.039 SEALING CAP
