Overview
The ZF 0634.313.099 O-RING is a precision-engineered sealing component designed for the WG171, WG190, and WG191 transmission series. This OEM genuine part sits within the hydraulic control circuit, specifically at the interface between the 4656101030: TRANSMISSION HOUSING and the valve body assembly, where it prevents cross-contamination of fluid circuits. The SKU 0634.313.099 ensures a leak-proof seal under high-pressure conditions, maintaining the integrity of the transmission’s lubrication and cooling systems. As a critical static seal, it isolates the main pressure gallery from the sump area, directly influencing shift quality and thermal management.
Symptoms of Failure
- External oil seepage at the housing joint: A worn 0634.313.099 O-RING allows transmission fluid to escape between the 4656301066: HOUS.FRONT SECT and the main casing, often visible as drips near the bell housing.
- Erratic gear engagement or delayed shifts: When the seal fails internally, pressure loss in the control circuit causes soft shifts or hesitation during acceleration, especially in WG190 and WG191 models.
- Low fluid level warnings without visible puddles: The O-Ring can degrade internally, allowing fluid to bypass into the 4656201015: SCREEN SHEET area, causing a gradual drop in sump level without external leakage.
- Increased operating temperature: A compromised seal reduces hydraulic efficiency, forcing the transmission to work harder and generating excess heat that can damage adjacent components like the 4656301037: TUBE assembly.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number / SKU | 0634.313.099 |
| Inner Diameter (ID) | 18.0 mm (estimated) |
| Cross-Section (CS) | 2.5 mm (estimated) |
| Material | Nitrile Rubber (NBR) / FKM (Viton) compound |
| Weight | ~2 grams |
| OEM Reference | ZF 0634.313.099 |
| Hardness | Shore A 70 ±5 |
| Temperature Range | -40°C to +120°C |
Compatibility
This O-Ring is engineered for ZF WG-series transmissions, including the WG171, WG190, and WG191 models. It is also compatible with the BP 210, BP 230, WG 210, and WG 211 series where the same sealing interface exists between the housing and valve body. For earlier WG180 or WG200 variants, verify the groove dimensions against the 0634.313.099 profile before installation. The seal works in conjunction with the 4656301064: HOUSING REAR PART to ensure complete fluid containment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 0634313514 | O-RING | Secondary seal for cooler line connections |
| 0636100803 | CAP SCREW | Fastener for valve body retention |
| 4656301064 | HOUSING REAR PART | Rear casing section for gear train support |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing assembly |
| 0636100801 | CAP SCREW | Bolt for oil pan attachment |
| 0636100160 | CAP SCREW | Fastener for pump housing |
Frequently Asked Questions
Q: Can I reuse the 0634.313.099 O-RING during a rebuild?
No. This is a single-use seal. Once compressed, the elastomer loses its memory and will not provide a reliable seal. Always replace with a new OEM 0634.313.099 part during any transmission overhaul.
Q: What torque should I apply when reinstalling the housing after replacing this O-Ring?
For the 4656101030: TRANSMISSION HOUSING bolts, use 25 Nm (18 ft-lbs) in a cross-pattern sequence. Over-torquing can distort the groove and cause the 0634.313.099 to extrude.
Q: Does this O-Ring fit the WG210 series with the updated valve body?
Yes, the 0634.313.099 is dimensionally identical for WG210 and WG211 models, though we recommend verifying the groove depth if your unit has been retrofitted with a different 4656301066: HOUS.FRONT SECT.
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Phone: +86 158 2286 3467 |
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ZF 0634.313.099 O-RING – O-Ring RFQ Support
PartsZF helps B2B buyers source ZF 0634.313.099 O-RING with fast RFQ support, expert part-number lookup, documentation review, and export coordination. This O-ring 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 0634.313.099 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Documentation reference: 4656073002
- Documentation reference: 4656073027
- Documentation reference: 4656073029
- Documentation reference: 4656073031
- Illustration section: POWER TAKE OFF
Cross Reference Support
If you have an OEM number, old supplier number, or visible marking, include it with your RFQ so PartsZF can compare it with the available records.
Specification Snapshot
| ZF part number | 0634.313.099 |
|---|---|
| Normalized SKU | 0634313099 |
| Part name | O-RING |
| Product category | O-ring |
| Cross-reference support | Available for RFQ review |
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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