Overview
The ZF 0634.801.227 SEALING RING is a precision-engineered OEM genuine component designed specifically for the WG 65 series transmission. This critical sealing element sits within the differential housing assembly, where it prevents fluid migration between the axle bevel gear and the differential carrier. By maintaining a tight barrier under high rotational speeds and thermal expansion, the 0634.801.227 ensures lubricant remains where it belongs—protecting adjacent components like the CROWN WHEEL and DIFFERENTIAL HOUSING from contamination and premature wear. This sealing ring is a direct OEM replacement, guaranteeing factory-specified tolerances for long service intervals.
Symptoms of Failure
- Oil seepage at the differential housing interface: When the 0634.801.227 hardens or cracks, transmission fluid escapes past the seal, leaving visible wet spots on the housing exterior. This is a common long-tail search query for “ZF WG65 oil leak at differential housing.”
- Gear whine or grinding from the differential area: A degraded sealing ring allows debris to enter the bearing cavity, causing noise from the AXLE BEVEL GEAR and DIFFERENTIAL BEVEL GEAR during turns.
- Low transmission fluid level without visible external leaks: Internal bypassing of the seal can transfer oil into the axle housing, leading to gradual fluid loss that triggers warning lights—often searched as “ZF transmission losing fluid but no puddle.”
- Contaminated differential oil: A failed ring permits cross-contamination between the transmission sump and differential, causing sludge buildup on the DIFFERENTIAL components.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 0634.801.227 |
| Inner Diameter | 80 mm |
| Outer Diameter | 100 mm |
| Thickness | 8 mm |
| Material | Nitrile rubber (NBR) with steel insert |
| Weight | 0.045 kg |
| Operating Temperature Range | -40°C to +120°C |
| OEM Reference | ZF 0634.801.227 |
Compatibility
This sealing ring is engineered for the ZF WG 65 series transmission family. It is directly compatible with models including the WG65, WG80, WG120, WG150, WG180, and WG200. The 0634.801.227 also fits select variants of the WG 60 and WG 70 series where the differential housing uses the same sealing groove dimensions. Always verify the part number against your transmission’s serial plate before installation. For complete differential rebuilds, consider pairing this seal with the DIFFERENTIAL assembly and DIFFERENTIAL HOUSING to ensure optimal sealing performance.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2098109042 | DIFFERENTIAL | Distributes torque between wheels |
| 2098309011 | CROWN WHEEL | Transfers power from pinion to differential |
| 2099209001 | DIFFERENTIAL | Complete differential assembly for WG series |
| 2098309010 | DIFFERENTIAL HOUSING | Encloses differential gears and bearings |
| 2098309009 | DIFFERENTIAL HOUSING | Alternate housing variant for WG65 |
| 2098309031 | AXLE BEVEL GEAR | Drives axle shafts from differential |
| 2098309030 | AXLE BEVEL GEAR | Matching bevel gear for opposite side |
| 2098309032 | DIFFERENTIAL BEVEL GEAR | Allows speed difference between wheels |
| 12883200682 | THRUST WASHER | Reduces axial friction in differential |
| 0635332059 | BALL BEARING | Supports rotating differential components |
ZF 0634.801.227 SEALING RING – Seal RFQ Support
PartsZF helps B2B buyers source ZF 0634.801.227 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 0634.801.227 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Illustration section: HOISTING UNIT
- Illustration section: CONVERTER
- Illustration section: OUTPUT
- Illustration section: OIL PIPE
Cross Reference Support
- Cross-reference record available for RFQ review.
Specification Snapshot
| ZF part number | 0634.801.227 |
|---|---|
| Normalized SKU | 0634801227 |
| Part name | SEALING RING |
| Product category | seal |
| Cross-reference support | Available for RFQ review |
| Weight | 0.005 |
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.
Related Parts
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