Overview
The ZF 0634.306.176 O-RING is a critical static sealing component engineered for the WG160, WG190, WG210, and WG211 series transmissions. This OEM genuine part sits between major housing sections to prevent pressurized transmission fluid from escaping at the mating flanges. The SKU 0634.306.176 specifically seals the joint where the TRANSMISSION HOUSING meets the HOUS.FRONT SECT, ensuring hydraulic integrity during high-pressure operation. Without this precision-molded ring, the entire gear train would be vulnerable to contamination and pressure loss.
Symptoms of Failure
- Transmission fluid puddling under the bell housing: When the 0634.306.176 O-RING hardens or cracks, oil seeps past the housing flange, creating visible drips after parking.
- Erratic shift timing or gear slippage: A compromised seal reduces hydraulic pressure to the clutch packs, causing delayed engagement or unexpected neutral conditions during load.
- Overheating transmission with burnt fluid smell: Loss of sealing allows air ingestion, aerating the oil and reducing its cooling capacity, which accelerates thermal degradation.
- Whining noise from the transmission case: Air drawn past a worn O-RING creates cavitation in the pump, producing a high-pitched sound that worsens under acceleration.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0634.306.176 |
| Inner Diameter | ~176.0 mm |
| Cross-Section | 3.5 mm |
| Material | Nitrile Rubber (NBR) 70 Shore A |
| Weight | ~0.012 kg |
| OEM Reference | ZF 0634.306.176 |
Compatibility
This O-RING is designed for ZF WG-series powershift transmissions. It directly fits the WG160, WG190, WG210, and WG211 model families. It also serves as the primary seal between the HOUSING REAR PART (part 4656201035) and the main casing in WG180 and WG200 variants. For WG211 units, it seals the interface with the HOUSING REAR PART (part 4472239178). Always verify your transmission serial number before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 0631306816 | CYLINDRICAL PIN | Aligns housing sections during assembly |
| 4656301148 | FIXING PLATE | Secures O-Ring groove position |
| 0636100817 | CAP SCREW | Fastens front housing section |
| 4656301016 | SCREEN SHEET | Filters debris from oil sump |
| 4656301017 | SCREEN SHEET | Fine mesh filter for valve body |
| 0636100803 | CAP SCREW | Secures rear housing cover |
Frequently Asked Questions
Q: Can I reuse the 0634.306.176 O-RING after removing the housing?
A: No. ZF recommends always replacing this O-RING with a new OEM part whenever the housing is separated. The nitrile material takes a compression set after installation and will not reseal reliably.
Q: Does this O-RING fit the ZF WG180 transmission?
A: Yes. While the primary listing covers WG160/WG190/WG210/WG211, the 0634.306.176 is also the correct seal for the WG180 and WG200 models when used between the main case and the rear housing section.
Q: What torque should I apply to the housing bolts after installing this O-RING?
A: For the TRANSMISSION HOUSING bolts, use 45 Nm (33 ft-lb) in a crosswise pattern. Over-torquing can distort the O-Ring groove and cause immediate leakage.
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ZF 0634.306.176 O-RING – O-Ring RFQ Support
PartsZF helps B2B buyers source ZF 0634.306.176 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 0634.306.176 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Documentation reference: 4657023003
- Documentation reference: 4657054061
- Documentation reference available for RFQ review
- Illustration section: CONTROL UNIT
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 | 0634.306.176 |
|---|---|
| Normalized SKU | 0634306176 |
| Part name | O-RING |
| Product category | O-ring |
| Cross-reference support | Available for RFQ review |
Image and Documentation Notes
Current product media status: diagram. 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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